271. The centre of gravity of a coupler link in a four bar mechanism will experience
no acceleration
only linear acceleration
only angular acceleration
both linear and angula
✅ The correct answer is option D.
Theory of machines MCQs
272. A rotor supported at A and B carries two masses as shown in the below figure. The rotor is
dynamically balanced
statically balanced
statically and dynamically balanced
not balanced
✅ The correct answer is option C.
273. Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
slow speed
moderate speed
highs peed
any one of these
✅ The correct answer is option C.
274. A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force
the reaction on me inner wheels increases and on the outer wheels decreases
the reaction on the outer wheels increases and on the inner wheels decreases
the reaction on the front wheels increases and on the rear wheels decreases
the reaction on the re
✅ The correct answer is option B.
276. The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.
greater than
less than
✅ The correct answer is option A.
277. Which of the following is a higher pair?
Belt and pulley
Turning pair
Screw pair
Sliding pair
✅ The correct answer is option A.
278. When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a
lower pair
higher pair
self-closed pair
force-closed pair
✅ The correct answer is option D.
279. The frictional torque transmitted by a disc or plate clutch is same as that of
flat pivot bearing
flat collar bearing
conical pivot bearing
truncated conical pivo
✅ The correct answer is option B.
280. The D-slide valve is also known as
inside admission valve
outside admission valve
piston slide valve
none of these
✅ The correct answer is option B.