141. The partial balancing means
balancing partially revolving masses
balancing partially reciprocating masses
best balancing of engines
all of these
✅ The correct answer is option B.
Theory of machines MCQs
142. The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by
ω2(r1 – r2)(1 – cos2θ)
ω2(r1 + r2)(1 + cos2θ)
ω2(r1 + r2)
ω2(r1 – r2)(1 – sin2 θ
✅ The correct answer is option C.
143. Which of the following mechanism is an approximate straight line motion mechanism?
Watt’s mechanism
Grasshopper mechanism
Robert’s mechanism
all of these
✅ The correct answer is option D.
145. When a rigid body is suspended vertically and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
simple pendulum
compound pendulum
torsional pendulum
second’s pendulum
✅ The correct answer is option B.
147. The arrangement is called bevel gearing, when two __________ are connected by gears.
intersecting and coplaner shafts
non-intersecting and non-coplaner shafts
parallel and coplaner shafts
parallel and non-copla
✅ The correct answer is option A.
148. In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to
minimise the effect of primary forces
minimise the effect of secondary forces
have perfect balancing
to start the locomotiv
✅ The correct answer is option B.
150. The time taken by a particle for one complete oscillationis known as periodic time.
Agree
Disagree
✅ The correct answer is option A.