Top 350+ Solved Applied Mechanics MCQ Questions Answer
Q. A force of 100 Newtons acts for 0.5 seconds on a body of mass 20 kg which is initially at rest. The velocity attained by the body is
a. 20 m/s
b. 5 m/s
c. 2.5 m/s
d. 0.5 m/s
e. 107 dynes
Q. The motion of a bicycle wheel is
a. Curvilinear
b. Translatory
c. Linear
d. Rotary as well as translatory
e. Rotary
Q. A particle in simple Harmonic Motion while passing through mean position will have
a. Maximum kinetic energy and minimum potential energy
b. Average kinetic energy and average potential energy
c. Minimum kinetic energy and maximum potential energy
d. Maximum kinetic energy and maximum
e. Minimum kinetic energy and minimum potential energy
Q. A bullet is fired from a fifle. If the rifle recoils freely, the kinetic energy of the rifle
a. will be the same as the kinetic energy of the bullet
b. will be less than the kinetic energy of the bullet
c. 107 dynes
d. will be more than the kinetic energy of the bullet
Q. The locus of a point on a thread unwound from a cylinder will be
a. A circle
b. A cycloid
c. A straight line
d. A spiral
e. An involute
Q. The moment of inertia of a thin spherical shell is
a. Mr2
b. 1/2 Mr2
c. 1/3 Mr2
d. 2/3 Mr2
e. None of the above
Q. A train travels between two stations 15 km apart in 18 minutes. If the train accelerates for a part of journey uniformly followed by uniform retardation, the maximum speed attained by the train during the journey will by
a. 125 km/hr
b. 107 dynes
c. 80 km/hr
d. 100 km/hr
e. 60 km/hr
Q. A man is standing ner the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platorm will decrease if he
a. extends his arms outwards
b. 107 dynes
c. moves towards the axis of rotation
d. jumps out from that platform
e. take out his coat and throws away
Q. A apinning ballet dancer draws her arms close to her chest. She will now
a. 107 dynes
b. spin at the same rate
c. spin faster
d. spin slower
e. stop spinning
Q. The moment of inertia of a solid sphere of radius r is
a. Mr2
b. 1/8 Mr2
c. 2/3 Mr2
d. m4
e. 1/2 Mr2
Q. A stone of wight 100 kg is thrown vertically upwards by a man of height y = 1.8 m with an initial velocity of 20 m/sec. The maximum height to which it will rise would be
a. 22.2 m
b. 26 m
c. 15.1 m
d. 20.2 m
e. 10 m
Q. The breaking strength of a rope is 400 N. A fireman weighing 60 kg slides down the rope. The rope will break if
a. 107 dynes
b. the acceleration is 7.5 m/s2
c. the acceleration is 1.2 m/s2
d. the acceleration is 3.1 m/s2
e. the slides with an acceleration of 15 m/s2
Q. In case of a beam subjected to pure bending
a. 107 dynes
b. the stress intensity in any fibre is proportional to the distance of the fibre from the neutral axis
c. the stress intensity in any fibre is proportional to the distance of the fibre from the load carrying end
d. the stress intensity in any fibre is uniform
e. the nature of stress in any fibre is identical
Q. A non-reversible machine has efficiency
a. less than 50%
b. nearly 100%
c. between 75% and 99%
d. more than 50%
e. 107 dynes