# 7000+ Mechanical Engineering Aptitude Questions & Answers - 1

Question: 1

Static friction is always

(A) equal to the dynamic friction

(B) either greater or more than the dynamic friction

(C) greater than the dynamic friction

(D) less than the dynamic friction

Ans: C

greater than the dynamic friction

Question: 2

The limiting force of friction is

(A) the friction force acting when the body is just about to move

(B) the friction force acting on a body when it is in motion

(C) the value of friction force which cannot exceed under a situation

(D) the value of friction force which stops the movement of the body

Ans: A

the friction force acting when the body is just about to move

Question: 3

The moment of inertia of an area is always least with respect to

(A) central axis

(B) vertical axis

(C) bottom most axis

Ans: A

central axis

Question: 4

A particle in simple harmonic motion while passing through mean position will have

(A) minimum kinetic energy and minimum potential energy

(B) minimum kinetic energy and maximum potential energy

(C) maximum kinetic energy and minimum potential energy

(D) maximum kinetic energy and maximum potential energy

Ans: D

maximum kinetic energy and maximum potential energy

Question: 5

The centre of percussions is

(A) the point of application of the resultant of all the forces tending to cause a body to rotate about a central axis

(B) the point of application of the resultant of gravity and buoyancy forces of the body

(C) the point in a body about which it can rotate horizontally and oscillates under the influence of gravity

(D) the same as centre of gravity

Ans: A

the point of application of the resultant of all the forces tending to cause a body to rotate about a central axis

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