Mechanical Aptitude MCQ Questions and Answers 3

Question 1

What type of stress occurs when a material is pulled apart?

Accepted Answer

Tensile stress

Answer

Compressive stress

Answer

Shear stress

Answer

Torsional stress

Question 2

What is the primary purpose of a differential in a vehicle?

Accepted Answer

To allow wheels to rotate at different speeds during turns

Answer

To increase engine power

Answer

To reduce fuel consumption

Answer

To connect the engine to the transmission

Question 3

Which type of thread has a V-shaped profile and is most common for fasteners?

Accepted Answer

Metric/Unified thread

Answer

Square thread

Answer

Acme thread

Answer

Buttress thread

Question 4

What does a thermostat do in a cooling system?

Accepted Answer

Regulates coolant flow based on temperature

Answer

Pumps coolant through the system

Answer

Cools the air entering the engine

Answer

Measures the exact coolant temperature

Question 5

What mechanical advantage does a screw provide?

Accepted Answer

Conversion of rotational force into large linear force

Answer

Speed multiplication

Answer

Reduction of friction to zero

Answer

Direction change only

Question 6

What is the purpose of a keyway in a shaft?

Accepted Answer

To prevent relative rotation between the shaft and a mounted component

Answer

To reduce the shaft's weight

Answer

To allow the shaft to flex

Answer

To cool the shaft during operation