NCCER Core Curriculum Exam — Questions and Answers

Question 1: Which document outlines the specific duties and qualifications required for a construction position?

Safety Data Sheet
Job description (Correct answer)
Building permit
Change order

Correct answer: Job description

A job description details the duties, responsibilities, qualifications, and expectations for a specific position, helping workers understand what is required.

Question 2: On a set of construction drawings, which type of line is thick and solid, used to represent the main outlines of a building or structure that are visible in a particular view?

Center line
Hidden line
Dimension line
Object line (Correct answer)

Correct answer: Object line

Object lines, also known as visible lines, are the thickest and most prominent lines on a blueprint. They are used to show the major outlines of the features of the building, such as walls, floors, and roofs, that are directly visible from the perspective of the drawing.

Question 3: According to Ohm's Law, if voltage remains constant and resistance doubles, what happens to current?

Current is reduced by half (Correct answer)
Current doubles
Current remains the same
Current increases by four times

Correct answer: Current is reduced by half

Ohm's Law states I = V/R; when R doubles with constant V, current (I) is reduced by half.

Question 4: On a floor plan drawn at 1/4 inch = 1 foot scale, a wall measures 3 inches on the drawing. What is the actual length of the wall?

3 feet
16 feet
8 feet
12 feet (Correct answer)

Correct answer: 12 feet

At 1/4" = 1' scale, each quarter inch on the drawing represents one foot. A 3-inch line contains 12 quarter-inches, so the actual wall length is 12 feet.

Question 5: Before you start drilling, make sure the drill bit is ______.

grounded
double-insulated
tightened in the chuck (Correct answer)
properly oiled

Correct answer: tightened in the chuck

Before drilling, it is crucial to ensure the drill bit is securely tightened in the chuck. A loose bit can fly out during operation, causing serious injury or damage to the workpiece. Proper tightening ensures stability, accuracy, and safe operation of the drill.

Question 6: Which drawing in a set would you reference to determine the reinforcing steel requirements for a concrete foundation?

Architectural floor plan
Landscape plan
Structural drawing (Correct answer)
Mechanical drawing

Correct answer: Structural drawing

Structural drawings contain all information about the building's structural system including foundation details, reinforcing steel (rebar) specifications, beam sizes, column locations, and load-bearing requirements.

Question 7: What tool is best used to cut nails?

Chisel
Reciprocating saw (Correct answer)
Hammer
Circular saw

Correct answer: Reciprocating saw

A reciprocating saw is an excellent tool for cutting nails, especially when they are embedded in wood or other materials. Its aggressive, back-and-forth cutting action and ability to use specialized metal-cutting blades allow it to quickly and effectively cut through nails, making it useful for demolition, remodeling, or freeing stuck components.

Question 8: A statement that explains how a company does business is called a(n) _______.

company philosophy
mission statement (Correct answer)
reference
employee handbook

Correct answer: mission statement

A mission statement is a concise declaration that explains a company's purpose, its core values, and how it conducts business. It defines the organization's reason for existence and its primary objectives, guiding its operations and decision-making. This statement serves as a foundational principle for employees and stakeholders alike.

Question 9: Which of the following is NOT a good safety practice when working with power tools?

Secure work with clamps or a vise
Remove damaged tools from the work area
Follow instructions in the user's manual
Always keep your finger on the switch button while carrying a power tool (Correct answer)

Correct answer: Always keep your finger on the switch button while carrying a power tool

Keeping your finger on the switch button while carrying a power tool is a dangerous practice because it can lead to accidental activation. An unexpected start-up can cause serious injury to yourself or others, or damage to the tool or workpiece. Always ensure the switch is off and your finger is away from the trigger when transporting tools.

Question 10: The gunpowder cartridges used to power a power-actuated tool are called _______.

boosters (Correct answer)
brakers
canisters
compressors

Correct answer: boosters

The gunpowder cartridges used to power a power-actuated tool are specifically called boosters. These boosters contain a small explosive charge that generates the force necessary to drive fasteners into hard materials like concrete or steel, making them integral to the tool's operation.

Question 11: To prevent damage to your tools, always:

read the manufacturer's instructions (Correct answer)
store them in easy to get to places near outlets
pull the cord to disconnect them from the outlet
carry them by the cord

Correct answer: read the manufacturer's instructions

To prevent damage to tools and ensure user safety, it is always essential to read and follow the manufacturer's instructions. These guidelines provide specific information on proper operation, maintenance, storage, and safety precautions, which are crucial for extending the tool's lifespan and preventing accidents.

Question 12: A power miter saw combines a miter box with a ______.

crosscut saw
circular saw (Correct answer)
bandsaw
nail-cutter saw

Correct answer: circular saw

A power miter saw combines the precise angle-cutting capabilities of a miter box with the cutting power and speed of a circular saw blade. This integration allows for accurate crosscuts and miter cuts on various materials, making it a versatile and essential tool for woodworking and construction tasks.

Question 13: While reviewing a set of blueprints, you need to find information such as the project name, architect's contact information, drawing scale, and the date of the last revision. In which part of the drawing would you find this information consolidated?

Title Block (Correct answer)
Drawing Index
General Notes
Legend

Correct answer: Title Block

The title block, typically located in the bottom right corner of every drawing sheet, contains essential project information. This includes the project name and location, architect/engineer details, the drawing scale, revision history, sheet title, and sheet number.

Question 14: What does a revision cloud on a construction drawing indicate?

An area where demolition will occur
A zone requiring special weather protection
An area with underground utilities
An area that has been modified since the previous version of the drawing (Correct answer)

Correct answer: An area that has been modified since the previous version of the drawing

Revision clouds are irregular cloud-shaped outlines drawn around areas of a drawing that have been changed or updated since the previous revision, making it easy to identify what is different.

Question 15: One of the most common grounding systems used for protection against accidental electrical shock is the ____ system.

Two-wire
Three-wire (Correct answer)
Four-wire
Five-wire

Correct answer: Three-wire

The three-wire grounding system is a crucial safety feature in electrical installations. It includes a hot wire, a neutral wire, and a dedicated ground wire that provides a safe path for electricity to flow to the earth in case of a fault. This prevents dangerous electrical shocks by quickly tripping a circuit breaker or fuse.

Question 16: What is the maximum height at which a scaffold platform can be used without guardrails?

Guardrails are always required on scaffolds
4 feet
6 feet
10 feet (Correct answer)

Correct answer: 10 feet

OSHA requires guardrails on scaffolds when the working platform is 10 feet or more above the next lower level, which is different from the 6-foot general construction fall protection threshold.

Question 17: What type of door would work best for a 4,5 or even a 6-foot closet door?

None of the above
Sliding Closet Doors
Bifold Doors (Correct answer)
Hinges Doors

Correct answer: Bifold Doors

Bifold doors are ideal for wider closet openings, such as 4, 5, or 6 feet, because they fold in sections, requiring minimal swing space compared to traditional hinged doors. This design allows for a larger opening width than sliding doors, providing better access to the closet's contents. Their compact operation makes them highly practical for broad storage areas.

Question 18: Drill bits are held in place by _______.

chucks (Correct answer)
augers
carbides
grips

Correct answer: chucks

Drill bits are held in place by the chuck, which is the adjustable clamping mechanism at the end of the drill. The chuck's jaws grip the shank of the drill bit firmly, preventing it from slipping or detaching during the high-speed rotation required for drilling. This secure connection is essential for both safety and effective drilling.

Question 19: Some manufacturers suggest that each time you use a pneumatic nailer, the air inlet needs ____.

to be cleaned with a small wire brush
a few drops of oil (Correct answer)
a few drops of water
a shot of compressed air to clear any dust

Correct answer: a few drops of oil

Pneumatic nailers, like many air tools, require lubrication to maintain their internal components and ensure smooth operation. Adding a few drops of oil to the air inlet before each use helps to lubricate the moving parts, preventing wear, corrosion, and ensuring the tool functions efficiently and reliably over time.

Question 20: What is an as-built drawing?

A preliminary sketch made before construction begins
A conceptual rendering showing the finished building's appearance
A drawing used only for estimating material costs
A drawing that documents the actual constructed conditions including any deviations from the original plans (Correct answer)

Correct answer: A drawing that documents the actual constructed conditions including any deviations from the original plans

As-built drawings (also called record drawings) document the actual conditions of the completed construction, including all changes, modifications, and deviations from the original design drawings.

Question 21: Before replacing parts such as bits, blades, or discs on any tool, you must _______.

polish it with a fine steel wool
recharge the tool's battery
disconnect the power source (Correct answer)
inspect them for cracks

Correct answer: disconnect the power source

Before replacing parts such as bits, blades, or discs on any power tool, it is absolutely essential to disconnect the power source. This critical safety step prevents the tool from accidentally starting up while you are handling sharp components, thereby eliminating the risk of severe injury during maintenance or part changes.

Question 22: The smallest mark on an imperial ruler is:

1/4 inch
Millimeter
1/2 inch
1/16 inch (Correct answer)

Correct answer: 1/16 inch

On a standard imperial ruler, the smallest common increment marked is 1/16 of an inch. These fine divisions allow for precise measurements in construction and woodworking. While some specialized rulers might have smaller markings, 1/16 inch is the most common smallest unit for general use.

Question 23: What color is the grounding conductor required to be in standard US electrical wiring?

Red
Black
Green (Correct answer)
White

Correct answer: Green

The NEC requires equipment grounding conductors to be green, green with yellow stripes, or bare copper.

Question 24: What is the purpose of a detail drawing in a construction drawing set?

To provide a bird's-eye view of the entire project site
To show a small, specific area at an enlarged scale with precise construction information (Correct answer)
To list all materials needed for the entire project
To display the construction timeline and milestones

Correct answer: To show a small, specific area at an enlarged scale with precise construction information

Detail drawings zoom in on a small area of the building at a much larger scale to show precise construction methods, material connections, and dimensions that cannot be clearly shown on the general drawings.

Question 25: What does a section line with arrows on a floor plan indicate?

The direction of water drainage
The path for emergency evacuation
The location and viewing direction of a cross-section cut through the building (Correct answer)
The direction of prevailing winds

Correct answer: The location and viewing direction of a cross-section cut through the building

Section lines with arrows indicate where an imaginary cut has been made through the building, and the arrows show the direction the viewer is looking at the cut section.

Question 26: If a Code of Federal Regulations Standard does not specifically address a workplace hazard, which of the following must be invoked?

The general duty clause (Correct answer)
The Code of Construction Safety
The Workplace Safety and Insurance Act
The Worker's Safety Act of 1984

Correct answer: The general duty clause

If a Code of Federal Regulations Standard (like OSHA standards) does not specifically address a workplace hazard, the General Duty Clause of the OSH Act must be invoked. This clause requires employers to provide a workplace free from recognized hazards that are causing or are likely to cause death or serious physical harm to employees. It acts as a catch-all to ensure worker safety even when specific regulations are absent.

Question 27: Material inventories and employee information can be stored on computer ________.

word processors
browsers
menus
databases (Correct answer)

Correct answer: databases

Databases are organized collections of information, making them ideal for storing and managing large amounts of structured data like material inventories and employee information. They allow for efficient storage, retrieval, and manipulation of data, enabling businesses to track resources, manage personnel records, and generate reports effectively.

Question 28: Each of the following would be considered company-confidential except ______.

your company's address (Correct answer)
a contract bid
your company's strategic plan
employee salaries

Correct answer: your company's address

Company-confidential information typically includes sensitive data like employee salaries, strategic plans, and contract bids, which could harm the business if disclosed. Your company's address, however, is generally public information, necessary for business operations, deliveries, and customer contact. It is not considered confidential in the same way as proprietary or internal financial data.

Question 29: Before plugging a saw into a power source, make sure the:

power switch is in the OFF position (Correct answer)
power switch is in the ON position
blade has been loosened
lower blade guard has been removed

Correct answer: power switch is in the OFF position

Before plugging a saw into a power source, it is a critical safety practice to ensure the power switch is in the OFF position. This prevents the saw from unexpectedly starting up immediately upon connection, which could cause serious injury or damage. Always verify the switch position before connecting power.

Question 30: Portable belt sanders are continuous-loop abrasive belts stretched between two ______.

springs
wheels
dowels
drums (Correct answer)

Correct answer: drums

Portable belt sanders utilize a continuous loop of abrasive material, known as a sanding belt, which is stretched and rotated between two drums. These drums drive the belt, allowing for efficient material removal and surface finishing across various applications. The drums are fundamental to the sander's operation.

Question 31: What is the current-carrying capacity (ampacity) of a 12 AWG copper conductor under standard conditions?

20 amperes (Correct answer)
40 amperes
30 amperes
15 amperes

Correct answer: 20 amperes

A 12 AWG copper conductor has an ampacity of 20 amperes as listed in NEC Table 310.12 under standard conditions.

Question 32: A person who is capable of identifying existing and predictable hazards and has authorization to take prompt corrective measures to eliminate such hazards is a _____ person.

qualified
proficient
eligible
competent (Correct answer)

Correct answer: competent

A 'competent person' is defined by OSHA as someone capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them. This designation is crucial in construction and other industries for ensuring on-site safety and compliance.

Question 33: In standard US 120V residential wiring, which wire is the ungrounded (hot) conductor?

Green wire
Black wire (Correct answer)
White wire
Bare copper wire

Correct answer: Black wire

The black wire is the ungrounded (hot) conductor in standard US residential wiring, carrying current from the panel to the load.

Question 34: What must be included in a site-specific safety plan before construction work begins?

Only the name of the safety officer and emergency phone numbers
A list of all workers and their home addresses
A comprehensive hazard assessment, emergency procedures, PPE requirements, and training documentation (Correct answer)
The project budget and timeline only

Correct answer: A comprehensive hazard assessment, emergency procedures, PPE requirements, and training documentation

A site-specific safety plan must comprehensively address all anticipated hazards, required PPE, emergency procedures, safety training requirements, and specific controls for the work being performed.

Question 35: Which of the following data is included on a material safety data sheet for a hazardous shipment?

Manufacturer's recommended product substitutes
How to contact the manufacturer of the substance (Correct answer)
Net weight criteria for packaging the container
The expiration date of the substance

Correct answer: How to contact the manufacturer of the substance

A Material Safety Data Sheet (MSDS), now often called a Safety Data Sheet (SDS), includes crucial information about hazardous substances, such as emergency procedures, handling precautions, and physical/chemical properties. Importantly, it also provides contact information for the manufacturer or importer. This ensures users can obtain further information or assistance if needed, promoting accountability and access to expert knowledge.

Question 36: When offering constructive criticism to a teammate, you should never ________.

compliment him or her first
point out incorrect techniques the first time they occur
write down your criticisms
criticize him or her in front of teammates or the supervisor (Correct answer)

Correct answer: criticize him or her in front of teammates or the supervisor

When offering constructive criticism, it is crucial to do so privately and respectfully to avoid embarrassing or humiliating the individual. Criticizing a teammate in front of others can damage their morale, create resentment, and undermine team cohesion. Private feedback allows for a more open and productive discussion focused on improvement.

Question 37: If you have a conflict with your supervisor, you should first ______.

think about the cause of the conflict (Correct answer)
discuss it with your teammates
leave a message with your supervisor
write down your thoughts

Correct answer: think about the cause of the conflict

Before approaching your supervisor about a conflict, it's essential to first reflect and understand the underlying causes of the disagreement. Identifying the root issues helps you articulate your concerns clearly and constructively, making the discussion more productive. This preparation allows for a more rational and less emotional approach to resolution.

Question 38: What is the purpose of a cripple stud in wall framing?

To provide the main structural support for the roof
To connect the sill plate to the foundation
To replace a damaged king stud
To fill the space above or below an opening such as a window or door (Correct answer)

Correct answer: To fill the space above or below an opening such as a window or door

Cripple studs are short studs that fill the framing space above a header or below a window sill, maintaining the regular stud spacing for sheathing attachment.

Question 39: Which type of circuit provides only one path for current to flow through all components?

Parallel circuit
Bridge circuit
Series circuit (Correct answer)
Combination circuit

Correct answer: Series circuit

In a series circuit, components are connected end-to-end in a single loop, providing only one path for current flow.

Question 40: When performing overhead work on scaffolding, what protective measures must be taken to prevent falling objects from striking a person below?

Fall arrest system
Warning tags on the scaffold
Toeboards, debris nets, or canopies (Correct answer)
Alarm systems

Correct answer: Toeboards, debris nets, or canopies

When performing overhead work on scaffolding, protective measures like toeboards, debris nets, or canopies are essential to prevent falling objects from striking people below. Toeboards prevent small items from being kicked off, while debris nets and canopies catch larger falling objects. These measures are critical for maintaining a safe work environment and protecting workers on lower levels.

Question 41: When installing floor joists, what is the most common on-center spacing used in residential construction?

32 inches
24 inches
12 inches
16 inches (Correct answer)

Correct answer: 16 inches

Floor joists in residential construction are most commonly spaced 16 inches on center, which provides adequate support for typical residential floor loads while using materials efficiently.

Question 42: The contribution of each member of a group toward a common goal is called _____.

cooperation
collaboration
distribution
teamwork (Correct answer)

Correct answer: teamwork

Teamwork is defined as the collaborative effort of a group to achieve a common goal or complete a task in the most effective and efficient way. It emphasizes the collective contribution and cooperation of each member, where individual strengths are combined to reach shared objectives. This synergy is vital for project success and a positive work environment.

Question 43: To prevent electric shock, only use tools that have proper:

electric tape
220 voltage
chuck key
ground fault protection (Correct answer)

Correct answer: ground fault protection

To prevent electric shock, it is essential to use tools that have proper ground fault protection, such as a Ground Fault Circuit Interrupter (GFCI). A GFCI quickly detects imbalances in electrical current, indicating a ground fault, and immediately shuts off power, protecting users from electrocution, especially in damp or hazardous conditions.

Question 44: To prevent cave-ins when excavating, treat all soil as if it is_____ unless proven otherwise.

solid rock
Type B
Type C (Correct answer)
Type A

Correct answer: Type C

In excavation safety, soil is classified into types (A, B, C) based on its stability, with Type C being the least stable and most prone to cave-ins. To ensure maximum safety, OSHA regulations require treating all soil as if it is Type C unless a qualified person has determined otherwise through testing. This precautionary principle helps prevent dangerous trench collapses and protects workers.

Question 45: Identifying options and alternatives is an important part of _______.

starting a business
critical thinking skills (Correct answer)
developing a financial plan
developing an organizational chart

Correct answer: critical thinking skills

Identifying options and alternatives is a core component of critical thinking skills. This process involves analyzing a situation from multiple perspectives, brainstorming various solutions, and considering the potential outcomes of each choice. It moves beyond simple problem recognition to actively exploring diverse paths toward an effective resolution.

Question 46: A Porta-Power is an example of a(n) ____ tool.

electric
pneumatic
hydraulic (Correct answer)
battery

Correct answer: hydraulic

A Porta-Power is a well-known brand name for a portable hydraulic ram and pump system. These tools utilize hydraulic fluid under pressure to generate immense force, making them ideal for tasks requiring powerful pushing, spreading, or lifting, such as in auto body repair or heavy equipment maintenance.

Question 47: Which strategy is most effective for managing time on a construction project?

Prioritizing tasks based on deadlines and dependencies (Correct answer)
Delegating all tasks to other team members
Completing tasks as they come up without planning
Working on the easiest tasks first regardless of urgency

Correct answer: Prioritizing tasks based on deadlines and dependencies

Prioritizing tasks based on deadlines and dependencies ensures that critical-path work gets completed on schedule and resources are used efficiently.

Question 48: An example of an AC source of power is ______.

fluid pressure
a battery
air
a wall plug (Correct answer)

Correct answer: a wall plug

A wall plug, or electrical outlet, provides alternating current (AC) power from the main electrical grid. This is the standard form of electricity supplied to homes and businesses, used to power most corded tools and appliances. In contrast, batteries provide direct current (DC) power.

Question 49: Keep the drill's air vent clean with a _______.

drill bit
small brush or stick (Correct answer)
hand-held vacuum cleaner
chuck key

Correct answer: small brush or stick

The air vents on a drill are essential for cooling the motor during operation. Keeping these vents clean with a small brush or stick prevents dust and debris from accumulating, which could obstruct airflow. Blocked vents can lead to motor overheating and potential damage to the tool, reducing its lifespan and performance.

Question 50: What tool shaves off the thickness of lumber?

Band saw
Circular saw
Hammer
Planer (Correct answer)

Correct answer: Planer

A planer is a woodworking machine specifically designed to shave off thin layers of wood from the surface of lumber. Its primary function is to reduce the thickness of a board, create parallel faces, and achieve a smooth, consistent dimension. This is essential for preparing lumber for fine woodworking or construction projects.

Question 51: On a site plan, what do contour lines represent?

Underground utility routes
Property boundary markers
Planned landscaping areas
Lines of equal elevation showing the terrain's shape (Correct answer)

Correct answer: Lines of equal elevation showing the terrain's shape

Contour lines connect points of equal elevation on a site plan, showing the shape and slope of the terrain. Closely spaced contour lines indicate steep slopes, while widely spaced lines indicate gentle grades.

Question 52: When using an air wrench, ______.

hold the impact socket a few inches away from the material
keep your body stance balanced (Correct answer)
hold onto the compressor hose with one hand
use handheld sockets that are the right size

Correct answer: keep your body stance balanced

When using an air wrench, especially an impact wrench, it's important to maintain a balanced body stance. These tools can generate significant torque and kickback, so a stable posture provides better control and reduces the risk of losing balance or sustaining injury during operation. This ensures both safety and effective use of the tool.

Question 53: When using a power drill. proper ground fault protection will prevent _______.

electric shock (Correct answer)
excess noise
you from losing your grip
drilling into electrical wire

Correct answer: electric shock

Proper ground fault protection, typically provided by a GFCI, is specifically designed to detect and interrupt electrical current flow when a ground fault occurs. This rapid interruption prevents the flow of electricity through a person's body, thereby protecting against electric shock. It is a vital safety measure when using power tools, especially in damp or wet conditions.

Question 54: When is it necessary to use a full-body harness and lanyard on a construction site?

When working at heights of 6 feet or more above a lower level in general construction (Correct answer)
Whenever working outdoors
Only when working on roofs steeper than 8/12 pitch
When carrying tools weighing more than 25 pounds

Correct answer: When working at heights of 6 feet or more above a lower level in general construction

OSHA requires fall protection, including personal fall arrest systems like harnesses and lanyards, when construction workers are exposed to falls of 6 feet or more to a lower level.

Question 55: What tool is used to drive a three-inch screw?

Cordless drill (Correct answer)
Wrench
Hammer
Screwdriver

Correct answer: Cordless drill

A cordless drill, equipped with the appropriate driver bit, is the best tool for driving a three-inch screw. Its powerful motor and adjustable torque settings allow it to drive long screws quickly and efficiently into various materials without stripping the screw head or fatiguing the user. A manual screwdriver would be impractical and much slower for such a task.

Question 56: Why is it important for construction workers to understand basic computer skills?

Workers must build their own project management software
Digital tools are increasingly used for scheduling, documentation, and communication (Correct answer)
Computer skills replace the need for hands-on trade knowledge
All construction work is now performed using robots

Correct answer: Digital tools are increasingly used for scheduling, documentation, and communication

Modern construction increasingly relies on digital tools for project scheduling, daily reports, plan viewing, timekeeping, and team communication, making basic computer literacy an essential employability skill.

Question 57: While walking through a construction site, you notice a cluttered walkway with extension cords running across the path, a pile of scrap lumber with nails sticking out, and a puddle of water from an unknown source. These are all examples of what?

A designated staging area
Unsafe conditions (Correct answer)
Standard operating procedures
Acceptable risks

Correct answer: Unsafe conditions

Poor housekeeping, which includes cluttered walkways, tripping hazards like cords, and materials with protruding nails, creates unsafe conditions. These conditions significantly increase the risk of slips, trips, falls, and other injuries on a job site.

Question 58: Which signal should a worker give to a crane operator to indicate 'stop' using standard hand signals?

One arm raised with a closed fist
Both arms waving overhead in large circles
Both arms extended outward with palms down, moving arms back and forth horizontally (Correct answer)
One arm extended with palm up, making a circular motion

Correct answer: Both arms extended outward with palms down, moving arms back and forth horizontally

The standard hand signal for 'stop' is both arms extended outward from the body with palms down, moving the arms back and forth horizontally in a sweeping motion.

Question 59: The speed at which stock is pushed through a saw blade is the ________.

rip guide
parallel
miter
feed rate (Correct answer)

Correct answer: feed rate

The speed at which stock (material) is pushed through a saw blade is known as the feed rate. Adjusting the feed rate is essential for efficient cutting, preventing the blade from binding, and achieving a clean cut without overheating the blade or motor. An appropriate feed rate ensures optimal performance and safety.

Question 60: What is the purpose of a drawing schedule in a construction document set?

To document material delivery dates
To list the order in which drawings should be reviewed
To set the construction timeline and worker shifts
To provide a table listing specifications for repetitive elements like doors, windows, or finishes (Correct answer)

Correct answer: To provide a table listing specifications for repetitive elements like doors, windows, or finishes

Drawing schedules are tabular formats that organize specifications for repetitive building elements such as doors, windows, room finishes, and fixtures, using reference symbols keyed to the floor plans.

Question 61: How many 2x4 blocks 22 1/2 inches long can be cut from a 2x4 that is 8 feet long?

2
8
4 (Correct answer)
6

Correct answer: 4

To determine how many 22 1/2 inch blocks can be cut from an 8-foot 2x4, first convert 8 feet to inches (8 feet * 12 inches/foot = 96 inches). Then, divide the total length by the length of each block: 96 inches / 22.5 inches = 4.26. Since you cannot cut a fraction of a block, only 4 full blocks can be obtained from the 8-foot board.

Question 62: Poor housekeeping, excessive noise, and inadequate guards for moving parts are examples of:

unavoidable hazards
acceptable risks
unsafe conditions (Correct answer)
unsafe acts

Correct answer: unsafe conditions

Unsafe conditions refer to any environmental or equipment-related factors in the workplace that could lead to an accident or injury. Poor housekeeping (clutter), excessive noise (hearing damage), and inadequate guards (contact with moving parts) are all examples of hazardous states of the workplace, rather than actions taken by individuals.

Question 63: Which type of conduit is approved for outdoor use, wet locations, and direct burial?

ENT (Electrical Non-metallic Tubing)
Flexible Metal Conduit (FMC)
EMT (Electrical Metallic Tubing)
Rigid Metal Conduit (RMC) (Correct answer)

Correct answer: Rigid Metal Conduit (RMC)

Rigid Metal Conduit (RMC) is the most durable conduit type and is approved for outdoor, wet, and direct burial applications.

Question 64: Before you plug any saw into a power source, make sure the ______.

speed is set to LOW
power switch in the OFF position (Correct answer)
lower blade guard is pulled back
work has been clamped down

Correct answer: power switch in the OFF position

Before plugging any saw into a power source, it is a critical safety practice to ensure the power switch is in the OFF position. This prevents the saw from unexpectedly starting up immediately upon connection, which could cause serious injury or damage. Always verify the switch position before connecting power.

Question 65: The first step to starting a new business is to _______.

establish a business philosophy
select a location for the business
develop a marking plan
evaluate the need for such a business (Correct answer)

Correct answer: evaluate the need for such a business

The foundational first step in starting any new business is to thoroughly evaluate the market need or demand for the product or service you plan to offer. Without a clear understanding of customer needs and market viability, even the best business plan or location will likely fail. This initial assessment helps ensure the business has a genuine purpose and potential for success.

Question 66: When nailing 2x6 inch joists, what nail should be used?

18 d
12 d (Correct answer)
All of the above can be used.
20 d

Correct answer: 12 d

For fastening 2x6 inch joists, a 12d (12-penny) nail is typically the appropriate size. The 'd' refers to the penny system, which historically indicated nail length. A 12d nail is long enough to provide sufficient penetration and holding power when joining two pieces of dimensional lumber like 2x6s, ensuring a strong structural connection.

Question 67: Which type of fire extinguisher is appropriate for fires involving energized electrical equipment?

Class C — dry chemical or CO2 (Correct answer)
Class D — dry powder for metals
Class B — foam
Class A — water-based

Correct answer: Class C — dry chemical or CO2

Class C fire extinguishers use non-conductive agents like dry chemical or carbon dioxide, making them safe to use on fires involving energized electrical equipment.

Question 68: What does AWG stand for in the context of electrical wire sizing?

Approved Wiring Guide
American Wire Gauge (Correct answer)
American Wiring Group
Amperage Wire Grade

Correct answer: American Wire Gauge

AWG stands for American Wire Gauge, the standard US system for specifying wire diameter where smaller numbers indicate larger wire sizes.

Question 69: What tool would be used to cut crown molding?

Hammer
Planer
Miter saw (Correct answer)
Circular saw

Correct answer: Miter saw

A miter saw is the ideal tool for cutting crown molding due to its ability to make precise angle cuts (miters) and bevel cuts. Crown molding requires compound angles to fit correctly, and a miter saw allows for accurate adjustments to achieve these complex cuts, ensuring tight and professional-looking joints.

Question 70: A craftsperson is looking at a floor plan with a scale of 1/4" = 1'-0". Using an architect's scale, they measure a wall to be 3 1/2 inches long. What is the actual length of the wall?

14 feet (Correct answer)
10 feet
7 feet
12 feet

Correct answer: 14 feet

The scale 1/4" = 1'-0" means that every quarter-inch on the drawing represents one foot in reality. To find the actual length, you divide the measured length (3.5 inches) by the scale factor (0.25 inches per foot). 3.5 / 0.25 = 14. Therefore, the actual length of the wall is 14 feet.

Question 71: The activity that consists of breaking a job into its component tasks and then analyzing each step for potential hazards is called a _____.

safety pre-assessment
hazardous incident simulation
job safety analysis (Correct answer)
safety breakdown structure

Correct answer: job safety analysis

The activity that consists of breaking a job into its component tasks and then analyzing each step for potential hazards is called a job safety analysis (JSA). A JSA identifies hazards, assesses risks, and determines the safest way to perform each task. This systematic approach helps prevent accidents and injuries by proactively addressing potential dangers before work begins.

Question 72: A common problem on the job site that contributes to delays is _____.

absenteeism (Correct answer)
closed-mindedness
personality conflicts
fear of change

Correct answer: absenteeism

Absenteeism is a common and significant problem on job sites that directly contributes to delays. When employees are frequently absent, it disrupts workflow, reduces productivity, and often requires other team members to pick up the slack, leading to project setbacks and increased costs. Consistent attendance is crucial for maintaining project schedules.

Question 73: What does professionalism in the construction industry primarily involve?

Wearing the most expensive safety equipment available
Arriving early but leaving before the shift ends
Demonstrating reliability, respect, and a strong work ethic (Correct answer)
Working independently without communicating with the team

Correct answer: Demonstrating reliability, respect, and a strong work ethic

Professionalism is demonstrated through consistent reliability, respectful interactions with coworkers and supervisors, and maintaining a strong work ethic throughout the workday.

Question 74: What is the correct sequence of steps for lockout/tagout (LOTO) before working on electrical equipment?

Turn off the main breaker and post a warning sign
De-energize, lock out the energy source, tag it, and verify zero energy state (Correct answer)
Wear rubber gloves and test with a voltage meter before proceeding
Notify coworkers, wear PPE, and begin work

Correct answer: De-energize, lock out the energy source, tag it, and verify zero energy state

Proper LOTO requires de-energizing the equipment, applying a lockout device, attaching a warning tag, and verifying zero energy before work begins.

Question 75: Critical thinking is the process of _____.

searching for jobs, then applying and interviewing
evaluating the need, then developing business and marketing plans
distrusting new ideas
evaluating information, then reaching a conclusion or making a decision (Correct answer)

Correct answer: evaluating information, then reaching a conclusion or making a decision

Critical thinking is a systematic process that involves objectively analyzing and evaluating information, arguments, and evidence to form a reasoned judgment or make an informed decision. It goes beyond simply accepting information at face value, encouraging deeper analysis and thoughtful consideration of various perspectives. This process is vital for effective problem-solving and decision-making in any field.

Question 76: Before drilling through a material, always:

disconnect the power source
drive a nail in first
find out what is on the other side (Correct answer)
reinsert the chuck key

Correct answer: find out what is on the other side

Before drilling through any material, it is critically important to determine what is on the other side. This precaution prevents accidental damage to hidden electrical wires, plumbing pipes, or structural components, which could lead to costly repairs, electric shock, or other serious hazards. Always verify the area behind your drilling point.

Question 77: Never use a circular saw that doesn't have an upper blade guard because the ______.

saw will not cut cleanly
guard protects you from touching the blade (Correct answer)
trigger lock will not work properly
saw kerf will be too wide

Correct answer: guard protects you from touching the blade

Never use a circular saw that doesn't have an upper blade guard because this guard is a crucial safety feature. It protects you from accidental contact with the rapidly spinning blade, which can cause severe injury. The guard also helps contain debris and prevents the blade from being exposed when not in use.

Question 78: What information is typically found in the title block of a construction drawing?

Worker shift schedules and contact numbers
Building inspection results and compliance certificates
Project name, drawing number, scale, date, and architect information (Correct answer)
Material cost estimates and supplier contacts

Correct answer: Project name, drawing number, scale, date, and architect information

The title block is a standardized area on a construction drawing that contains essential reference information including the project name, drawing number, scale, revision date, and the names of the architect or engineer who prepared it.

Question 79: The adjustable tool rest on a bench grinder should be positioned ___ inch from the wheel.

1/2
1/8 (Correct answer)
1/4
3/4

Correct answer: 1/8

On a bench grinder, the adjustable tool rest must be positioned no more than 1/8 inch from the grinding wheel. This small gap is a critical safety measure that prevents the workpiece from being jammed between the rest and the wheel, which could cause kickback, damage the workpiece, or lead to serious injury.

Question 80: A measure of the probability, consequences, and exposure related to an event is referred to as _____.

risk (Correct answer)
evaluation
hazard
safety

Correct answer: risk

A measure of the probability, consequences, and exposure related to an event is referred to as risk. In safety management, risk assessment involves evaluating the likelihood of a hazard causing harm and the severity of that harm. Understanding risk allows for the implementation of appropriate control measures to minimize potential negative outcomes and improve safety.

Question 81: What does GFCI stand for in electrical work?

Ground Fault Current Indicator
General Fault Circuit Interrupter
Ground Fault Circuit Interrupter (Correct answer)
Ground Flow Current Interrupter

Correct answer: Ground Fault Circuit Interrupter

GFCI stands for Ground Fault Circuit Interrupter, a device that detects ground faults and cuts power to prevent electrical shock.

Question 82: Which conflict resolution approach is recommended when a disagreement arises between coworkers on a job site?

Agreeing with the other person to avoid confrontation regardless of safety implications
Ignoring the issue and hoping it resolves itself
Discussing the issue calmly and focusing on finding a mutually acceptable solution (Correct answer)
Reporting the other person to management immediately without attempting discussion

Correct answer: Discussing the issue calmly and focusing on finding a mutually acceptable solution

Calm, direct discussion focused on finding a mutually acceptable solution is the recommended first step for resolving workplace conflicts before they escalate.

Question 83: A system that protects workers from hazardous energy while they work with machines and equipment is referred to as _____.

a barricade system
an energy-neutral system
lockout/tagout (Correct answer)
a disconnect

Correct answer: lockout/tagout

Lockout/tagout (LOTO) is a safety procedure used to ensure that dangerous machines are properly shut off and not able to be started up again prior to the completion of maintenance or servicing work. It protects workers from hazardous energy by physically locking and tagging energy-isolating devices, preventing accidental energization or release of stored energy. This system is critical for preventing serious injuries or fatalities during machine servicing.

Question 84: Never use a circular saw without a lower blade guard because the:

guard protects you from the blade and falling particles (Correct answer)
wood will split
trigger lock won't work
saw blade may fall off

Correct answer: guard protects you from the blade and falling particles

The lower blade guard on a circular saw is a critical safety feature. Its primary purpose is to cover the exposed part of the blade when the saw is not cutting, preventing accidental contact with the spinning blade. Additionally, it helps to contain sawdust and other debris that can be ejected during cutting, protecting the operator from flying particles.

Question 85: When setting up a portable extension ladder to access a roof, what is the minimum distance the top of the ladder must extend above the point of support (e.g., the edge of the roof)?

It must be exactly even with the edge.
1 foot (0.3 meters)
3 feet (0.9 meters) (Correct answer)
5 feet (1.5 meters)

Correct answer: 3 feet (0.9 meters)

According to OSHA standards for ladder safety, when a portable ladder is used to access an upper landing surface, the ladder side rails must extend at least 3 feet above the upper landing surface to provide a secure handhold for workers getting on and off the ladder.

Question 86: A dashed line on a floor plan typically represents an object or feature that is:

a visible, primary outline.
the central axis of a symmetrical object.
to be demolished.
hidden from view in that specific plan. (Correct answer)

Correct answer: hidden from view in that specific plan.

Dashed lines, often called hidden lines, are used on construction drawings to indicate edges or features that are not visible from the current viewpoint. For example, on a floor plan, they might show a beam in the ceiling above or a foundation element below.

Question 87: Discrimination towards an individual based on race, sex, religion, cultural issues, or language barriers is known as _______.

derogatory conduct
conflict
abuse
harassment (Correct answer)

Correct answer: harassment

Discrimination towards an individual based on protected characteristics like race, sex, religion, cultural issues, or language barriers is legally and ethically defined as harassment. Harassment creates a hostile work environment and is unacceptable, violating workplace policies and often anti-discrimination laws. It undermines respect and equality in the workplace.

Question 88: What does the term 'housekeeping' refer to in construction site safety?

Cleaning the construction office and break areas
Maintaining an organized and clean work area free of debris and tripping hazards (Correct answer)
Storing personal belongings in designated lockers
Hiring a cleaning service for the completed building

Correct answer: Maintaining an organized and clean work area free of debris and tripping hazards

Construction site housekeeping means keeping work areas organized, clean, and free of unnecessary materials, debris, and hazards that could cause slips, trips, or falls.

Question 89: What tool is best used to install shingles?

Pneumatic nailer (Correct answer)
Screwdriver
Drill
Staple gun

Correct answer: Pneumatic nailer

A pneumatic nailer, specifically a roofing nailer, is the best tool for installing shingles. It rapidly drives nails with consistent depth and power, significantly increasing efficiency and reducing fatigue compared to manual nailing. This ensures shingles are securely fastened according to manufacturer specifications.

Question 90: When gas welding or burning, welders are required to wear tinted goggles or welding hoods with a filter lens of not less than a _____ shade.

No. 8
No. 2
No. 10
No. 4 (Correct answer)

Correct answer: No. 4

When gas welding or burning, welders are required to wear tinted goggles or welding hoods with a filter lens of not less than a No. 4 shade. This specific shade provides adequate protection against the intense light and harmful ultraviolet radiation produced during these processes. Using the correct filter lens is crucial for preventing eye damage such as arc flash or cataracts.

Question 91: What does the abbreviation 'O.C.' mean on a construction drawing?

Outside corner
Original construction
Open circuit
On center — the distance measured from the center of one member to the center of the next (Correct answer)

Correct answer: On center — the distance measured from the center of one member to the center of the next

O.C. stands for 'on center,' indicating that the specified dimension is measured from the center of one structural member to the center of the adjacent member.

Question 92: On power tools, you should never engage the _____.

bit shank
booster
trigger lock (Correct answer)
locking spring

Correct answer: trigger lock

On power tools, you should never engage the trigger lock unless specifically instructed for a particular operation and with extreme caution. The trigger lock keeps the tool running continuously without the user holding the trigger, removing immediate control over stopping the tool. This significantly increases the risk of accidents or loss of control, making it a major safety hazard.

Question 93: Kickback occurs with a table saw when the ______ kicks back.

table
material or stock (Correct answer)
saw
worker

Correct answer: material or stock

Kickback on a table saw refers to the dangerous event where the workpiece, or 'material/stock,' is suddenly and forcefully thrown back towards the operator. This usually happens when the material binds between the blade and the fence, or when the blade pinches the wood. It is a serious hazard that can cause severe injury.

Question 94: What is the primary purpose of a Job Safety Analysis (JSA)?

To calculate the cost of safety equipment for a project
To break down a job into steps and identify potential hazards at each step (Correct answer)
To document completed safety training for regulatory compliance
To determine which workers should be assigned to specific tasks

Correct answer: To break down a job into steps and identify potential hazards at each step

A Job Safety Analysis systematically breaks down a task into individual steps and identifies the potential hazards associated with each step, along with controls to mitigate those hazards.

Question 95: What minimum safe distance must unqualified workers maintain from overhead power lines up to 50kV, per OSHA 1926.416?

15 feet
20 feet
5 feet
10 feet (Correct answer)

Correct answer: 10 feet

OSHA 1926.416 requires unqualified workers to stay at least 10 feet away from overhead power lines energized up to 50kV.

Question 96: Which type of construction drawing shows the exterior appearance of a building from a specific side?

Detail drawing
Section
Elevation (Correct answer)
Floor plan

Correct answer: Elevation

Elevations are orthographic drawings that show the exterior appearance of a building as viewed from a specific direction — typically labeled as north, south, east, and west elevations.

Question 97: A worker who has been discriminated against for asserting his or her OSHA rights has the right to file a complaint within a _____ period.

15-day
60-day
30-day (Correct answer)
5-day

Correct answer: 30-day

OSHA (Occupational Safety and Health Administration) protects workers from discrimination for exercising their safety rights. If a worker believes they have been discriminated against, they have a 30-day period from the date of the alleged discrimination to file a complaint with OSHA. This timeframe ensures timely investigation and protection of worker rights, encouraging a safe work environment.

Question 98: What is PL-400?

Plywood specification
Type of construction adhesive (Correct answer)
Number of teeth on a hacksaw
Drill bit size

Correct answer: Type of construction adhesive

PL-400 is a well-known brand and type of heavy-duty construction adhesive. It is widely used in building for bonding various materials, including wood, concrete, and metal, providing a strong and durable hold. Its specific formulation makes it suitable for demanding construction applications.

Question 99: When stepping off a ladder onto a platform or roof, the top of the ladder should extend above the point where the ladder touches the platform or roof by at least _____.

5 feet
2 feet
3 feet (Correct answer)
4 feet

Correct answer: 3 feet

When stepping off a ladder onto a platform or roof, the top of the ladder should extend at least 3 feet above the landing surface. This extension provides a secure handhold for workers as they transition on and off the ladder, significantly improving stability and preventing falls. It is a critical safety requirement for ladder use to ensure safe access and egress.

Question 100: In a standard 240V residential circuit, what color is typically used for the second hot conductor?

White
Black
Red (Correct answer)
Green

Correct answer: Red

In a 240V circuit, the second ungrounded (hot) conductor is typically red, while the first hot conductor is black.

NCCER Core Curriculum Exam

This exam certifies individuals in fundamental construction skills, safety, and knowledge essential for entry-level craft professionals.

100

Questions

120 min

Time Limit

70%

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