AFCT Auto and Shop Information 3

Question 1

What component converts the up-and-down motion of pistons into rotational motion?

Accepted Answer

Crankshaft

Answer

The crankshaft converts the linear motion of pistons into the rotational motion needed to drive the wheels.

Question 2

What is the purpose of applying flux before soldering?

Accepted Answer

To clean the joint and prevent oxidation

Answer

Flux cleans metal surfaces of oxides and prevents new oxidation during soldering, allowing proper solder bonding.

Question 3

In a four-stroke engine, what happens during the compression stroke?

Accepted Answer

The piston moves up and compresses the air-fuel mixture

Answer

During compression, the piston moves upward with both valves closed, compressing the air-fuel mixture before ignition.

Question 4

What tool is used to cut threads on the outside of a cylindrical rod?

Accepted Answer

Die

Answer

A die cuts external threads on rods or bolts. A tap cuts internal threads inside holes.

Question 5

What does a vehicle's differential allow the wheels to do?

Accepted Answer

Rotate at different speeds during turns

Answer

The differential allows drive wheels to rotate at different speeds during turns since the outer wheel must travel farther than the inner wheel.

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