NCCER CORE Hand Tool Identification and Use Questions and Answers 1 — Questions and Answers
Question 1: An electrician needs to make a small, precise loop at the end of a solid copper wire to connect it to a screw terminal. Which of the following pliers is best suited for this specific task?
- Lineman's pliers
- Tongue-and-groove pliers
- Needle-nose pliers (Correct answer)
- Slip-joint pliers
Correct answer: Needle-nose pliers
Needle-nose pliers (also called long-nose pliers) have long, tapered jaws perfect for detailed work, such as forming loops in wire, especially in tight spaces like a junction box. Lineman's pliers are too bulky for this, tongue-and-groove pliers are for pipes and large objects, and slip-joint pliers are for general gripping, not fine wire forming.
Question 2: To prevent rounding the corners of a brass hex nut on a plumbing fixture, which type of wrench provides the most surface contact and is the best choice for the job?
- Open-end wrench
- Box-end wrench (Correct answer)
- Pipe wrench
- Adjustable wrench
Correct answer: Box-end wrench
A box-end wrench has a closed loop that fits completely over a hex nut, gripping it on all six flat sides. This distributes the turning force evenly and significantly reduces the risk of slipping and rounding the corners, which is especially important on softer metals like brass.
Question 3: Over time, the striking end of a cold chisel can deform and spread out, creating a hazard. What is this condition called, and what is the correct safety procedure?
- Flattening; the chisel should be discarded and replaced immediately.
- Peening; the end should be hammered back into a rough shape.
- Flaring; the end should be coated with a heavy grease.
- Mushrooming; the head should be ground back to its original shape. (Correct answer)
Correct answer: Mushrooming; the head should be ground back to its original shape.
The deformation on the struck end of a chisel is called a "mushroomed" head. This condition is hazardous because the metal can become brittle and sharp fragments can fly off when struck. The correct safety procedure is to grind the head to remove the mushrooming and restore a slight chamfer.
Question 4: Which of the following handsaws is specifically designed with a very thin, narrow blade held under tension in a C-shaped frame, making it ideal for cutting intricate curves and shapes in wood?
- Ripsaw
- Hacksaw
- Coping saw (Correct answer)
- Crosscut saw
Correct answer: Coping saw
A coping saw is characterized by its thin blade and frame, which allows it to make tight, curved cuts. It is used for tasks like cutting joints for molding and other detailed woodworking. Ripsaws and crosscut saws are for straight cuts in wood, while hacksaws are primarily for cutting metal.
Question 5: A screw head has a single, straight slot across its diameter. Which type of screwdriver should be used for this fastener?
- Phillips
- Slotted (Flathead) (Correct answer)
- Torx
- Robertson
Correct answer: Slotted (Flathead)
A screw with a single straight indentation is designed to be driven by a slotted, or flathead, screwdriver. The other types are designed for specific, shaped recesses: Phillips for a cross shape, Torx for a star shape, and Robertson for a square shape.
Question 6: Which of the following is a fundamental practice for preventing rust and ensuring the longevity of metal hand tools like wrenches, chisels, and hammers?
- Storing them in an open, easily accessible bin.
- Washing them with harsh chemical degreasers after every use.
- Keeping them clean, dry, and applying a light coat of oil. (Correct answer)
- Painting all metal surfaces with a thick layer of enamel.
Correct answer: Keeping them clean, dry, and applying a light coat of oil.
The most effective and standard way to care for metal hand tools is to keep them clean and dry and to apply a light film of oil or other rust-preventative product. This creates a barrier that protects the metal from moisture and prevents corrosion. Improper storage or the use of harsh chemicals can damage the tools.
NCCER CORE Hand Tool Identification and Use Questions and Answers 1
An electrician needs to make a small, precise loop at the end of a solid copper wire to connect it to a screw terminal.
Which of the following pliers is best suited for this specific task?