Q.1 A wound watch spring possesses energy stored in the form of ______ .
A. Potential energy
C. Mechanical energy
C. Kinetic energy
D. Mechanical potential energy
Ans-: D
Q.2 __________ of a body does not depend upon the angular velocity of the body.
A. Acceleration
B. Moment of inertia
C. Kinetic energy
D. Mass
Ans-: B
Q.3 For a machine to be self-locking , its efficiency should be ______.
A. 100 %
B. More than 50 %
C. Less than 50 %
D. 85 %
Ans-: C
Q.4 The value of acceleration due to ______ at poles as compared to at equator is greater.
A. Gravity
B. Weight
C. Latitude
D. Direction
Ans-: A
Q.5 The weight of an object would be ________ when it is placed at the centre of the earth.
A. Maximum
B. Zero
C. Minimum
D. Unpredictable
Ans-: C
Q.6 When a body falls freely under gravita-tional force, it possesses
A. Minimum weight
B. No weight
C. Maximum weight
D. No effect on weight
Ans-: B
Q.7 A jet engine work on the principle of
A. Conservation of energy
B. Conservation of linear momentum
C. Conservation of mass
D. None of the above
Ans-: B
Q.8 Which law provide the defination of force?
A. First law of thermodynamics
B. Law of energy conservation
C. First law of motion
D. Law of moments
Ans-: C
Q.9 The angle of repose is always _________ to angle of friction.
A. Equal
B. Less than
C. Greater than
D. Inversely proportional
Ans-: A
Q.10 The greatest angle, at which a plane must be inclined to the horizontal, before the body lying on it just slides down known as ___.
A. Angle of repose
B. Angle of friction
C. Coefficient of friction
D. None of the above
Ans-: A
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