Top 350+ Solved Applied Mechanics MCQ Questions Answer
Q. The necessary condition of equilibrium of a body is
a. The algebraic sum of horizontal components of all forces must be zero
b. The algebraic sum of vertical components of all forces must be zero
c. The algebraic sum of forces about a point must be zero
d. All the above
e. None of the above
Q. The displacement of a particle under going rectilinear motion along the x-axis is given by x = 2t3 + 21t2 + 60t + 6 metres.
a. 27 m/s2
b. 18 m/s2
c. 36 m/s2
d. 9 m/s2
e. 107 dynes
Q. A couple consists of a force P acting at a point A whose coordinates are (-1,2,4) m and force - F acting at a point whose coordinates are (2,3, -2)m. If F = 3i + 2j - 4k in kg units the moment of the couple in kg - m units would be
a. 8i - 6j - 3k
b. 12i - 3j + k
c. 16i - 12j - 6k
d. 4i - 3j + k
e. 8i + 5j + 3k
Q. A block slides down a smooth inclined plane when released from the top while another falls freely from the same point. The value of which parameter in the two cases will be identical?
a. Time taken to reach the ground
b. Kinetic energy at the ground
c. Momentum at the ground
d. Velocity while touching the ground
e. Kinetic energy after one second
Q. The sag in a tape 100 ft long held between two supports 8 ft aprat at the same level is
a. 3.32 ft
b. 0.98 ft
c. 2.73 ft
d. 1.87 ft
e. 107 dynes
Q. A piece of wetted wood just floats in water. When placed in an oil of specific gravity 0.75, it will
a. Float with upside down
b. Sink
c. Float for sometime and then sink
d. Float with 3/4 of volume above the liquid surface
e. Float with 1/4 of volume above the liquid level
Q. Which of the following statement is incorrect?
a. A body can have energy without having momentum
b. A body cannot have kinetic energy without having momentum
c. A body in motion will always have kinetic energy more than the potential energy
d. None of the above
e. 107 dynes
Q. The value of acceleration due to gravity is 980 cm/sec2. Its value in meter per (hour)2 will be
a. 1.27 x 108
b. 127
c. 1270
d. 1.27 x 107
e. 1270000
Q. The torque acting on a system is zero. Which of the following will be conserved?
a. Angular velocity
b. Linear momentum
c. 107 dynes
d. Angular momentum
e. Moment of inertia
Q. Our weight will be zero under all of the following conditions EXCEPT
a. 107 dynes
b. We are at the centre of the earth
c. When we are ascending in a lift with acceleration of 4.9 m/s2
d. We are orbiting in a satellite
e. When we are freely faling
Q. A clock with a second pendulum is gaining 5 minutes a day. To correct it
a. The eccentricity of bob with pendulum should be decreased
b. The length of the pendulum should be decreased
c. The length of pendulum should not be changed
d. The length of the pendulum should be increased
e. The eccentricity of bon with pendulum should be increased
Q. Which of the following is not a projectile?
a. Bullet coming out of a revolver
b. Arrow released from a bow
c. Lifting of a balloon
d. Throwing a cricket ball from one player to another
e. None of the above
Q. The piston of a steam engine moves in S.H.M. The crank rotates at 180 r.p.m. and the stroke length is 2 metres. The linear velocity of the piston when it is at a distance of 1 metre from the centre is
a. 8.88 m/sec
b. 16.32 m/sec
c. 5.88 m/sec
d. 8.16 m/sec
e. Zero
Q. A cage weighing 200 kg is lowered down a mine shaft with uniform acceleration. In the first 5 sec the cage reaches a depth of 20 m. The tension in the cord lowering the cage would be
a. 836 kg
b. 167.2 kg
c. 100 kg
d. 41.8 kg
e. 200 kg
Q. Static friction is always
a. greater than the dynamic driction
b. either greater or more than the dynamic friction
c. less than the dynamic friction
d. 107 dynes
e. equal to the dynamic friction