Apprenticeship Exam Mechanical Aptitude and Principles 2

Question 1

When two gears of equal size and equal tooth count are meshed together, the driven gear will:

Accepted Answer

Rotate at the same speed as the drive gear

Answer

Two meshing gears with equal tooth counts rotate at the same speed but in opposite directions.

Question 2

A compression spring has a spring constant of 50 lbs/inch and is compressed 2 inches from its natural length. What force is required?

Accepted Answer

100 lbs

Answer

Using Hooke's Law, force = spring constant × displacement: 50 lbs/inch × 2 inches = 100 lbs.

Question 3

Torque is best defined as:

Accepted Answer

A rotational force that causes or tends to cause rotation about an axis

Answer

Torque is a rotational force (moment) that causes an object to rotate around an axis, commonly measured in foot-pounds or Newton-meters.

Question 4

If you double the pressure in a pneumatic system while keeping the piston area the same, the output force will:

Accepted Answer

Double

Answer

Since Force = Pressure × Area, doubling the pressure while area stays constant directly doubles the output force.

Question 5

Which type of friction acts between two surfaces that are moving (sliding) against each other?

Accepted Answer

Kinetic friction

Answer

Kinetic (sliding) friction is the resistive force acting between surfaces that are in relative motion against each other.

Apprenticeship Exam Practice Test