191. In a full journal bearing, the angle of contact of the bearing with the journal is
120°
180°
270°
360°
✅ The correct answer is option D.
Machine Design MCQs
192. When a belt drive is transmitting maximum power,
effective tension is equal to centrifugal tension
effective tension is half of centrifugal tension
driving tension on slack side is equal to centrifugal tension
driving tension on tig
✅ The correct answer is option D.
193. For crank shaft bearings, the ratio of the length of the journal to its diameter is less than unity.
Correct
Incorrect
✅ The correct answer is option A.
194. If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as
T sec3 φ
T sec2 φ
T/sec3 φ
T cosec φ
✅ The correct answer is option A.
195. The wear load should be __________ the dynamic load.
equal to
less than
greater than
✅ The correct answer is option B.
196. A steel containing more than 0.8% carbon is known as eutectoid steel.
Yes
No
✅ The correct answer is option B.
197. Oldham coupling is used to connect two shafts
which are perfectly aligned
which are not in exact alignment
which have lateral misalignment
whose axes intersect a
✅ The correct answer is option C.
198. In a steam engine, the valve rod is connected to an eccentric rod by means of
cotter joint
knuckle joint
universal joint
flange coupling
✅ The correct answer is option B.
199. If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio
increases
decreases
remains unchanged
✅ The correct answer is option C.
200. A bushed pin flexible coupling is used to connect two shafts whose axes intersect at a small angle.
Yes
No
✅ The correct answer is option B.