Apprenticeship Exam Mechanical Aptitude and Principles

Question 1

A first-class lever has the fulcrum positioned:

Accepted Answer

Between the effort and the load

Answer

At the same point as the load

Answer

At one end of the lever

Answer

Beyond the load on the far side

Question 2

Two meshing gears have 20 teeth and 40 teeth. If the smaller gear rotates at 60 RPM, what is the speed of the larger gear?

Accepted Answer

30 RPM

Answer

120 RPM

Answer

60 RPM

Answer

15 RPM

Question 3

A single fixed pulley changes which of the following?

Accepted Answer

It changes the direction of the applied force without reducing effort

Answer

It reduces the amount of force needed to lift a load

Answer

It multiplies force by the number of rope segments

Answer

It moves along with the load being lifted

Question 4

What is the mechanical advantage of a lever with a 4-foot effort arm and a 1-foot resistance arm?

Accepted Answer

4

Answer

1

Answer

2

Answer

8

Question 5

An inclined plane is 10 feet long with a vertical rise of 2 feet. What is its mechanical advantage?

Accepted Answer

5

Answer

2

Answer

10

Answer

20

Question 6

In a hydraulic system, a piston with an area of 2 square inches receives a force of 10 pounds. What pressure is generated?

Accepted Answer

5 psi

Answer

2 psi

Answer

10 psi

Answer

20 psi

Question 7

A wheel and axle is most similar in operating principle to which simple machine?

Accepted Answer

Lever

Answer

Inclined plane

Answer

Wedge

Answer

Pulley