WTMA Common Tools and Fasteners 2

Question 1

Which type of screwdriver bit is required for a Torx fastener?

Accepted Answer

Star-shaped (6-point)

Answer

Torx fasteners have a 6-pointed star recess that requires a matching star-shaped Torx bit.

Question 2

A bolt has a tensile strength rating. What does this rating indicate?

Accepted Answer

The maximum pulling force before failure

Answer

Tensile strength is the maximum axial pulling (tension) force a bolt can withstand before breaking.

Question 3

What is the primary purpose of a tap wrench?

Accepted Answer

Cutting internal threads in a hole

Answer

A tap wrench holds and turns a tap to cut internal (female) threads inside a drilled hole.

Question 4

Which fastener type is designed to be installed from one side without access to the back?

Accepted Answer

Pop (blind) rivet

Answer

Pop rivets (blind rivets) are designed for one-sided installation where the back of the joint is inaccessible.

Question 5

A mechanic uses a breaker bar instead of a ratchet. What advantage does the breaker bar provide?

Accepted Answer

It provides greater torque leverage without a ratcheting mechanism

Answer

A breaker bar's longer handle provides more torque leverage for loosening stubborn fasteners, without the internal ratchet that could flex or break under high loads.

WTMA - Wiesen Test of Mechanical Aptitude Practice Test

WTMA - Wiesen Test of Mechanical Aptitude Practice Test

WTMA Common Tools and Fasteners 2