Mechanical Aptitude FREE Mechanical Aptitude MCQ Question and Answers 2

Question 1

A wheelbarrow is an example of which class of lever?

Accepted Answer

Second-class lever

Answer

A wheelbarrow is a second-class lever because the load is between the fulcrum (wheel) and the effort (handles).

Question 2

If two gears are meshed together and the driving gear has 20 teeth while the driven gear has 40 teeth, what is the gear ratio?

Accepted Answer

1:2

Answer

The gear ratio is driving teeth to driven teeth, which is 20:40 or 1:2.

Question 3

What happens to the pressure in a hydraulic system when the area of the output piston is doubled while the input force remains the same?

Accepted Answer

Pressure stays the same

Answer

Pressure in the system depends on input force divided by input piston area, so changing the output piston area does not affect system pressure.

Question 4

A block is placed on an inclined plane at 30 degrees. Which force component acts parallel to the surface pulling the block downward?

Accepted Answer

mg sin 30°

Answer

The component of gravitational force parallel to an inclined surface is mg sin(theta).

Question 5

Which type of belt drive arrangement is used to reverse the direction of rotation of the driven pulley?

Accepted Answer

Crossed belt drive

Answer

A crossed belt drive causes the driven pulley to rotate in the opposite direction of the driving pulley.

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