Top 350+ Solved Applied Mechanics MCQ Questions Answer
Q. A uniform cylinder of weight W is rolling while slipping on a rough horizontal surface under the influence of a horizontal force. The force of friction between the cylinder and the surface is
a. Indeterminate
b. Proportional to the coefficient of dynamic friction
c. Determinate but depends on the acceleration of the cylinder
d. 107 dynes
e. Proportional to the coefficient of static friction
Q. The forces which meet at one point but their lines of action do not lie in one plane, are called
b. Coplanar noncurrent forces
c. Non-coplanar nonconcurrent forces
d. Intersecting forces
e. Coplanar concurrent forces
Q. The locus of instantaneous centre of a moving rigid body
a. Epicycloid
b. Straight line
c. Involute
d. Cycloid
e. Centrode
Q. When all the forces acting on a body lie in one plane and their lines of action meet at one point, the forces
a. constitute a moment
b. constitute a couple
c. are known as coplaner-concurrent forces.
d. are known as non-coplaner forces
e. 107 dynes
Q. A force F = 2i + 3j - k is passing through the origin. Its moment about point (1, 1, 0) is
a. Zero
b. 2i + 3j
c. i - j - k
d. i + j
e. i + j + k
Q. Efficiency of a screw jack in maximum when its 31 helix angle, ? is
a. 45 + ?/2
b. 107 dynes
c. ?
d. 45 - ?/2
e. 45?
Q. When two concurrent and coplaner forces P and Q act at an angle of 180?, their resultant will be a
a. moment equal to PQ
b. couple
c. (P-Q)
d. 107 dynes
e. zero
Q. A man lifts a stone weighting 300 g from the ground to a height of 2m and throws it horizontally with a velocity of 6 m/sec. The work done by the man is
a. 7.686 J
b. 11.286 J
c. 5.886 J
d. 8.343 J
e. Tapered bearing
Q. A body of weight 100 kg is placed on a horizontal plane. A horizontal force of 30 kg is applied and the block is just on the point of motion. The angle of friction is
a. About 16?
b. 30?
c. 45?
d. 60?
e. None of the above
Q. If the above tape weights 0.001 kg/ft, sag is
a. 2.73 ft
b. 3.13 ft
c. 2.90 ft
d. 3.03 ft
e. 107 dynes
Q. A body whose true weight is 14 kg appears to weigh 15 kg when weighed with the help of a spring balance in a moving lift. The acceleration of the lift at the time was
a. 1 m/sec2
b. 0.7 m/sec2
c. 0.5 m/sec2
d. 1.4 m/sec2
e. 0.35 m/sec2
Q. Which of the following pair will have identical dimensions?
a. Pressure and surface tension
b. Work and kinetic energy
c. Momentum and force
d. Moment of inertia and angular momentum
e. None of the above
Q. A particle is moving in Simple Harmonic Motion in a simple pendulum with some period of oscillation. Now in order to double the period of oscillation
a. The length of pendulum should be quadrupled
b. The length of pendulum should be doubled
c. The mass of the bob should be halved
d. The length of pendulum should be reduced to one fourth
e. The mass of the bob should be doubled
Q. Under which circumstances will have zero velocity and be still accelerating?
a. The bob of a simple pendulum when at its mean position
b. 107 dynes
c. A steamer while taking a turn
d. A ball at its highest point of its rise when thrown up
e. Tyres of a stationary automobile