Free IST Mechanical Aptitude Questions and Answers

Question 1

Which type of simple machine is a seesaw?

Accepted Answer

Lever

Answer

Pulley

Answer

Inclined Plane

Answer

Screw

Question 2

If Gear A has 20 teeth and Gear B has 40 teeth, how many rotations will Gear A make when Gear B makes one rotation?

Accepted Answer

2 rotations

Answer

0.5 rotations

Answer

1 rotation

Answer

4 rotations

Question 3

Which of the following describes the mechanical advantage of an inclined plane?

Accepted Answer

The length of the plane divided by the height of the plane

Answer

The height of the plane divided by the length of the plane

Answer

The weight of the load divided by the length of the plane

Answer

The weight of the load divided by the height of the plane

Question 4

Which principle explains why a hydraulic press can lift a heavy object with a small force?

Accepted Answer

Pascal's Principle

Answer

Archimedes' Principle

Answer

Bernoulli's Principle

Answer

Newton's Third Law

Question 5

What happens to the effort force required to lift a load if the length of the lever arm is increased?

Accepted Answer

It decreases

Answer

It increases

Answer

It remains the same

Answer

It fluctuates

Question 6

In a wheel and axle system, what happens to the force applied if the radius of the wheel is larger than the radius of the axle?

Accepted Answer

The force is multiplied

Answer

The force is reduced

Answer

The force is equal

Answer

The force is negated

Question 7

Which of the following describes the function of a pulley system?

Accepted Answer

It changes the direction of the applied force and can also reduce the effort needed to lift a load

Answer

It only changes the direction of the applied force

Answer

It increases the load

Answer

It decreases the load