Electrical and Mechanical Concepts Quiz

Which of the following should be used to cut EMT?

• Pipe cutter

• Hacksaw

• Table saw

• Chop saw

Answer explanation

A hacksaw is the most suitable tool for cutting EMT (Electrical Metallic Tubing) due to its fine-toothed blade, which provides a clean cut. Pipe cutters are typically used for softer materials, while table and chop saws are not ideal for this application.

A die is used to _____.

• cut threads in conduit

• bend segments of conduit

• smooth the inside edge of conduit

• cut RMC and IMC

Answer explanation

A die is a tool specifically designed to cut threads in conduit, allowing for secure connections. The other options do not accurately describe the primary function of a die.

Which of the following eliminates wrinkling or flattening when bending PVC?

• Hickey

• Die

• Reamer

• Plug set

Answer explanation

A plug set is used to support the interior of PVC during bending, preventing wrinkling or flattening. Other options like hickey, die, and reamer do not serve this specific purpose.

Which of the following can be used to bend IMC?

• A reamer

• A hickey

• A die

• A hacksaw

Answer explanation

A hickey is a tool specifically designed for bending Intermediate Metal Conduit (IMC). Unlike a reamer, die, or hacksaw, which serve different purposes, a hickey provides the leverage needed to create bends in IMC effectively.

A pocket knife can be used to deburr _____.

• RMC

• IMC

• PVC

• EMT

Answer explanation

A pocket knife is effective for deburring EMT (Electrical Metallic Tubing) because it can smooth out sharp edges after cutting. The other materials listed (RMC, IMC, PVC) are not typically deburred with a pocket knife.

The formula π × D is used to calculate _____.

• diameter

• circumference

• radius

• surface area

Answer explanation

The formula π × D calculates the circumference of a circle, where D represents the diameter. Thus, the correct answer is circumference.

Two 90-degree bends in the same piece of conduit are required for a(n) _____.

• offset

• back-to-back bend

• kick

• parallel bend

Answer explanation

A parallel bend requires two 90-degree bends in the same conduit to create a pathway that runs parallel to the original line. This distinguishes it from other types of bends like offsets or kicks.

When creating an offset using 10° bends (with a multiplier of 6) to cross a 6-inch obstruction, the distance between bends is _____.

• 12 inches

• 24 inches

• 36 inches

• 42 inches

Answer explanation

To calculate the distance between bends for a 10° offset with a multiplier of 6, use the formula: Distance = 6 inches x 6 = 36 inches. Thus, the correct answer is 36 inches.

Which of the following is most commonly used to cut RMC and IMC?

• Pipe cutter

• Reciprocating saw

• Table saw

• Chop saw

Answer explanation

A chop saw is specifically designed for cutting metal pipes like RMC and IMC efficiently and accurately, making it the most commonly used tool for this purpose compared to the other options.

Which of the following describes circumference?

• The area of one of four quadrants of a circle

• The distance around a circle

• The distance from the center point of a circle to the edge

• The distance from one edge of a circle to the other

Answer explanation

Circumference refers to the distance around a circle, making 'The distance around a circle' the correct choice. The other options describe different aspects of a circle, such as area or radius.