191. The velocity ratio of a differential wheel and axle with D as the diameter of effort wheel and d1,and d2 as the diameters of larger and smaller axles respectively, is
✅ The correct answer is option D.
Engineering Mechanics MCQs
192. The force, by which the body is attracted, towards the centre of the earth, is called
impulsive force
mass
weight
momentum
✅ The correct answer is option C.
193. Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is __________ than that about X-X axis.
two times
same
half
✅ The correct answer is option A.
194. The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.
Correct
Incorrect
✅ The correct answer is option A.
195. A non-reversible machine is also called a self-locking machine.
Agree
Disagree
✅ The correct answer is option A.
196. The moment of inertia of a thin disc of mass m and radius r, about an axis through its centre of gravity and perpendicular to the plane of the disc is
mr2/2
mr2/4
mr2/6
mr2/8
✅ The correct answer is option A.
197. When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ proportional to its acceleration.
directly
inversely
✅ The correct answer is option A.
198. Whenever a force acts on a body and the body undergoes a displacement, then
work is said to be done
power is being transmitted
body has kinetic energy of translation
none of these
✅ The correct answer is option A.
199. In a screw jack, the effort required to lift the load is given by(where W = Load lifted, α = Helix angle, and φ = Angle of friction.)
P = W tan (α – φ)
P = W tan (α + φ)
P = W tan (φ – α)
P = W cos (α + φ)
✅ The correct answer is option B.
200. The loss of kinetic energy due to direct impact of two bodies __________ upon the value of coefficient of restitution.
depends
does not depend
✅ The correct answer is option A.