261. A pendulum which executes one beat per second is known as
simple pendulum
compound pendulum
torsional pendulum
second’s pendulum
✅ The correct answer is option D.
Engineering Mechanics MCQs
262. The velocity ratio for the third system of pulleys is
n
n2
2n
2n – 1
✅ The correct answer is option D.
263. A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)
P = W tanα
P = W tan(α + φ)
P = W (sinα + μcosα)
P = W (cosα + μsinα)
✅ The correct answer is option C.
264. Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.
Yes
No
✅ The correct answer is option A.
265. The range of a projectile is maximum, when the angle of projection is
30°
45°
60°
90°
✅ The correct answer is option B.
266. Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is
bh3/4
bh3/8
bh3/12
bh3/36
✅ The correct answer is option D.
267. If a number of forces are acting at a point, theirresultant will be inclined at an angle θ with the horizontal, such that
tan θ = ∑H/∑V
tan θ = ∑V/∑H
tan θ = ∑Vx∑H
✅ The correct answer is option B.
268. The total time taken by a projectile to reach maximum height and to return back to the ground, is known as time of flight.
Yes
No
✅ The correct answer is option A.
270. Moment of inertia of a circular section about an axis perpendicular to the section is
πd3/16
πd3/32
πd4/32
πd4/64
✅ The correct answer is option C.