Engineering mechanics MCQ-: 07

Q.1 What is the escape velocity on the surface of the earth?

A. 11.2 km/sec

B. 11.2 m/sec

C. 1.5 km/sec

D. 2.5 m/sec

Ans-: A

Q.2 What happened , if the speed of rotation of earth decrease ?

A. The weight of the body will remain same

B. The weight of the body will decrease

C. The weight of the body will increase

D. None of the above

Ans-: C

Q.3 "If three forces acting on a particle keep it in equilibrium then each is proportional to the sine of the angle between the other two " .

A. Law of superposition

B. Lami's theorem

C. Pascal's law

D. Law of moments

Ans-: B

Q.4 A string which offers no resistance on bending at any point is called ?

A. Curve string

B. Bend string

C. Flexible string

D. Uniform string 

Ans-: C

Q.5 A machine is said to be _______ when the load gets lowered on removal of the effort.

A. Ideal

B. Irreversible

C. Reversible

D. None of the above

Ans-: C

Q.6 If an object is thrown in air with certain initial velocity and allowed to fall under influence of gravity, it will traverse along a certain path before falling on the ground ,known as _____.

A. Hyperbolic

B. Circular

C. Constant

D. Trajectory

Ans-: D

Q.7 Which type of shape trajectory have?

A. Circular

B. Parabolic

C. Hyperbolic

D. Straight

Ans-: B

Q.8  Rotational power P = torque × _______.

A. Angular velocity

B. Force

C. Acceleration

D. Angular viscosity

Ans-: A

Q.9 The point on the body at which a blow may be struck so that the reaction at the point of suspen-sion is zero.

A. Centre of gravity of the body

B. Centre of percussion

C. Centre of gravity

D. None of the above

Ans-: B

Q.10 Gravitation deals with the mutual attraction which exists between _____.

A. Bodies

B. Points

C. Systems

D. None on the above

Ans-: A