Top 350+ Solved Applied Mechanics MCQ Questions Answer
Q. A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is
a. moving at constant velocity
b. accelerating forward while going around a curve of radius equal to the maximum height attained by the ball
c. 107 dynes
d. accelerating forwardA block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height
e. decelerating
Q. The angular velocity of earth is
a. 0.00727 sec-1
b. 0.000727 sec-1
c. 0.0000727 sec-1
d. 0.00000727 sec-1
e. None of the above
Q. The torque of 50 Nm is applied on the wheel operating a valve. If the wheel is rotated through two revolutions, work done in Newton-metres is given by
a. 628
b. 107 dynes
c. 314
d. 25
e. 100
Q. A horizontal load of 120 kg/mt is to be carried by a cable suspended between supports at same level and 60 mts apart. If the maximum permissible tension is 36,000 kg the required length of cable is
a. 63.3 mets
b. 62.5 mts
c. 60.8 mts
d. 107 dynes
e. 60.1 mts
Q. For a self locking lifting machine, the efficiency must be
a. 50 percent
b. 100 percent
c. more than 50 percent
d. 107 dynes
e. less than 50 percent
Q. The periodic time of a body moving in Simple Harmonic Motion is
a. Directly proportional to its angular velocity
b. Directly proportional to the weight of the body
c. Inversely proportional to the square of angular velocity
d. Directly proportional to the momentum of swinging body
e. Inversely proportional to the angular velocity
Q. A satellite orbits around the earth due to
a. Celestial force
b. Gravitational force
c. Centrifugal force
d. Centripetal force
e. All of the above
Q. The resultant of a force acting on a body will be zero, if the body
a. Rotates with uniform acceleration
b. Moves along a curved path
c. Rotates
d. Does not rotate
e. Rotates with uniform deceleration
Q. What will be the duration of day and night if the earth shrinks to half the present radius?
a. 6 hours
b. 12 hours
c. 107 dynes
d. 3 hours
e. 24 hours
Q. If you want to stop the car in the shortest distance on an icy road, you should
a. 107 dynes
b. not apply the brakes
c. pump' the brakes
d. push hard the brakes to lock the wheels
e. push just hard enough to prevent slipping
Q. A man pulls a cart with 100 N force from rest with an acceleration of 10 m/sec2 for 10 seconds. The work done by him is
a. 500 KJ
b. 50.96 KJ
c. 101.92 KJ
d. None of the above
e. Tapered bearing
Q. The shape of a suspended cable under its own weight is
a. Catenary
b. Elliptical
c. Cycloidal
d. Semi-circle
e. Parabolic