WTMA - Wiesen Test of Mechanical Aptitude Levers, Pulleys, and Gears Questions and Answers

Question 1

In the gear system shown, the driver gear (A) rotates clockwise. An idler gear (B) is placed between gear A and the driven gear (C). In which direction will gear C rotate?

Accepted Answer

Clockwise

Answer

Counter-clockwise

Answer

It will not rotate

Answer

It will alternate directions

Question 2

Which of the following lever classes always provides a mechanical advantage greater than 1, meaning the output force is always greater than the effort force?

Accepted Answer

Second-Class Lever

Answer

First-Class Lever

Answer

Third-Class Lever

Answer

All classes can provide this advantage

Question 3

A pulley system is set up to lift a heavy engine block. The system uses multiple pulleys, and the rope is threaded so that 4 rope segments are supporting the movable block attached to the engine. Ignoring friction, what is the mechanical advantage of this system?

Accepted Answer

4

Answer

2

Answer

3

Answer

8

Question 4

A large gear with 60 teeth is driven by a small pinion gear with 20 teeth. If the small pinion gear rotates at 300 RPM, what will be the approximate speed of the large gear?

Accepted Answer

100 RPM

Answer

900 RPM

Answer

300 RPM

Answer

150 RPM

Question 5

Imagine you are using a crowbar to lift a heavy rock. You place a small stone under the crowbar to act as a fulcrum. The rock is the load, and you push down on the end of the crowbar. This is an example of which class of lever?

Accepted Answer

First-Class Lever

Answer

Second-Class Lever

Answer

Third-Class Lever

Answer

Fourth-Class Lever

Question 6

In a pulley system, if you have to pull 10 feet of rope to lift a load 2 feet off the ground, what is the ideal mechanical advantage (IMA) of the system?

Accepted Answer

5

Answer

2

Answer

4

Answer

10