Mechanical Aptitude FREE Mechanical Aptitude MCQ Question and Answers 3

Question 1

A pipe with a large diameter connects to a pipe with a small diameter. As water flows from the large pipe into the small pipe, what happens to the flow velocity?

Accepted Answer

Velocity increases

Answer

According to the continuity equation, when the cross-sectional area decreases the fluid velocity must increase to maintain constant flow rate.

Question 2

Which simple machine is best represented by a screw?

Accepted Answer

An inclined plane wrapped around a cylinder

Answer

A screw is fundamentally an inclined plane wrapped in a spiral around a central shaft.

Question 3

Two springs with spring constants k1 = 100 N/m and k2 = 200 N/m are connected in parallel. What is the combined spring constant?

Accepted Answer

300 N/m

Answer

Springs in parallel have their constants added, so the combined constant is 100 + 200 = 300 N/m.

Question 4

A 10 kg object moves at 5 m/s. What is its kinetic energy?

Accepted Answer

125 J

Answer

Kinetic energy = 0.5 × m × v² = 0.5 × 10 × 25 = 125 J.

Question 5

What is the primary purpose of a flywheel in a mechanical system?

Accepted Answer

To store rotational energy and smooth out power delivery

Answer

A flywheel stores rotational kinetic energy and releases it to maintain consistent power output during fluctuations.

Mechanical Aptitude Test Practice Test

Mechanical Aptitude Test Practice Test

Mechanical Aptitude FREE Mechanical Aptitude MCQ Question and Answers 3