Mixed Deck — All MASS Topics Flashcards

An isometric drawing shows an object with:

Answer: Three faces at equal angles

Isometric views display three faces with equal 120° angles.

To be safe, the ladder should be pitched one-third of its operating height away from the building. What distance away from the structure should the ladder be pitched if the building is 30 meters tall and the working height is 21 meters?

Answer: 7 meters

The safety rule states the ladder should be pitched one-third of its *operating height* away from the building. The problem specifies the working height as 21 meters. Therefore, to find the correct distance, you simply calculate one-third of 21 meters. This calculation yields 7 meters, regardless of the total building height.

When checking the engine oil level, the dipstick reading should be:

Answer: Between the minimum and maximum marks

Oil should register between the minimum and maximum marks on the dipstick for proper engine lubrication.

Why should you signal even when you think no one is around?

Answer: Unseen road users or pedestrians may be present

Other road users or pedestrians you haven't noticed may rely on your signal.

When two shapes are congruent, they have:

Answer: Same shape and size

Congruent shapes match in both shape and size.

What does a bold line or shaded area on a load chart commonly indicate?

Answer: The point where the limitation changes from structural strength to stability (tipping)

The line separates capacities limited by structural strength from those limited by stability/tipping.

What should you inspect on the wheels besides the tires?

Answer: Lug nuts, rims, and bearings for security and damage

Lug nuts, rims, and bearings should be checked for tightness and damage to ensure wheel safety.

Which of the following is the BEST practice for ensuring safety when preparing to work on a high-pressure steam line?

Answer: Verify the line is properly isolated, de-pressurized, vented, and locked out.

High-pressure steam is extremely dangerous due to high temperatures and pressure. The only safe method is to follow formal procedures to verify that the steam line has been isolated from the source, completely de-pressurized and vented, and secured using Lockout/Tagout procedures. Assumptions and informal checks are unsafe and can lead to catastrophic failure.

In Massachusetts, what must you do at a stop sign before proceeding?

Answer: Come to a complete stop, then proceed when safe

A full stop is required at a stop sign, after which you may proceed when it is safe.

Does Massachusetts Dig Safe law apply to a homeowner installing a fence post by hand?

Answer: Yes, any excavation requires notification regardless of who digs

The law applies to all excavators including homeowners; any digging requires a Dig Safe notification.

A technical passage states: 'The efficiency of a mechanical system is the ratio of work output to work input, expressed as a percentage. It is calculated by dividing the Actual Mechanical Advantage (AMA) by the Ideal Mechanical Advantage (IMA) and then multiplying the result by 100.' A technician tests a pulley system and finds it has an IMA of 5 and an AMA of 4. What is the efficiency of this system?

Answer: 80%

Following the formula given in the passage, Efficiency = (AMA / IMA) * 100. Using the provided values: (4 / 5) * 100 = 0.8 * 100 = 80%.

A 2-stroke engine requires a precise fuel mixture of gasoline to oil at a 40:1 ratio. If a container is filled with 82 ounces of this mixture, exactly how many ounces are oil?

Answer: 2.0 ounces

The ratio 40:1 means for every 40 parts of gasoline, there is 1 part of oil, making a total of 41 parts in the mixture. To find the amount of oil, divide the total volume (82 ounces) by the total number of parts (41), which equals 2 ounces per part. Since oil represents 1 part, there are 2.0 ounces of oil.

An operator is instructed by a signal person to lift a load that the operator believes exceeds the crane's rated capacity. What is the correct course of action?

Answer: Refuse to handle the load until safety has been assured.

According to 520 CMR 6.08(c)(10), 'The operator shall be responsible for those operations under their direct control. When there is any doubt as to the safety of any action, the operator shall have the authority to stop and refuse to handle loads until safety has been assured.' The operator has the final authority and responsibility for safe operation.

Soft or unstable ground under an outrigger most directly threatens which type of capacity limit?

Answer: Stability-based (tipping) capacity

Settling ground reduces the effective stability base and can lead to tipping.

An operator holds a valid Massachusetts 1C hoisting license. Which of the following pieces of equipment are they permitted to operate?

Answer: A hydraulic telescoping boom without wire rope and a forklift

A Class 1C license in Massachusetts specifically covers equipment with hydraulic telescoping booms without wire ropes, as well as forklifts. Class 1A is required for lattice cranes, 1B for telescoping booms with wire rope, and Class 2 licenses (like 2A or 2B) are required for excavators and backhoes.

What is the primary safety reason for monitoring carbon monoxide levels in a combustion area?

Answer: CO is a toxic, odorless gas that can cause poisoning

Carbon monoxide is colorless and odorless and can cause poisoning or death, so continuous monitoring is essential.

When must headlights be turned on in Massachusetts?

Answer: From dusk to dawn, in poor visibility, and when using wipers

Headlights are required from a half-hour after sunset to a half-hour before sunrise, in low visibility, and whenever wipers are in continuous use.

Complete the sequence: 1, 4, 9, 16, ___?

Answer: 25

These are perfect squares, and 5 squared is 25.

As the load radius increases on a mobile crane, the rated capacity generally:

Answer: Decreases

Capacity drops as the load moves farther from the center of rotation because leverage on the crane increases.

The primary purpose of a job hazard analysis (JHA) is to:

Answer: Identify hazards in each task step before work begins

A JHA breaks tasks into steps to find and control hazards.