WTMA - Wiesen Test of Mechanical Aptitude Wheels, Axles, and Rotation Questions and Answers

Question 1

Two bicycles, A and B, are traveling side-by-side at the exact same speed. Bicycle A has larger wheels than Bicycle B. Which statement is true about the rotation of the wheels?

Accepted Answer

The wheels of Bicycle A are rotating at a slower RPM.

Answer

The wheels of both bicycles are rotating at the same RPM.

Answer

The wheels of Bicycle B are rotating at a slower RPM (revolutions per minute).

Answer

The size of the wheel does not affect the RPM at a constant speed.

Question 2

Gear A is turning clockwise and is meshed directly with Gear B. Gear B is on the same axle as Gear C, which is smaller. Gear C is meshed directly with Gear D. In which direction is Gear D turning?

Accepted Answer

Clockwise

Answer

Counter-clockwise

Answer

It will not turn.

Answer

The direction is indeterminate.

Question 3

In a simple wheel and axle system, such as a winch used to lift a heavy bucket from a well, where is the effort force typically applied to gain a mechanical advantage?

Accepted Answer

To the handle on the outer edge of the wheel.

Answer

To the axle, to rotate the wheel.

Answer

To the rope attached to the bucket.

Answer

Equally to both the wheel and the axle.

Question 4

A mechanic is trying to loosen a stubborn, rusted bolt. After failing with a standard wrench, which of the following actions would be MOST effective in helping them loosen the bolt?

Accepted Answer

Using a wrench with a longer handle or adding a pipe to extend it.

Answer

Applying the same force closer to the bolt.

Answer

Using a wrench with a shorter handle.

Answer

Pushing on the wrench at a 45-degree angle to the handle.

Question 5

Which of the following best describes the fundamental purpose of a solid axle in a simple two-wheel cart?

Accepted Answer

To connect the wheels and ensure they rotate together at the same rate.

Answer

To reduce the overall weight of the cart.

Answer

To provide suspension for a smoother ride.

Answer

To act as the primary braking mechanism.

Question 6

How does using wheels and an axle make it easier to move a heavy object across a flat surface compared to simply dragging it?

Accepted Answer

By converting high sliding friction into much lower rolling friction.

Answer

By increasing the normal force between the object and the surface.

Answer

By lowering the object's center of gravity.

Answer

By eliminating all frictional forces entirely.