531. A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
castle nut
jam nut
ring nut
sawn nut
✅ The correct answer is option C.
Machine Design MCQs
532. The application of third type levers is found in
handle of a hand pump
hand wheel of a punching press
lever of a loaded safety valve
a pair of tongs
✅ The correct answer is option D.
533. For maximum power, the velocity of the belt will be
none of these
✅ The correct answer is option C.
534. An open belt drive is used when
shafts are arranged parallel and rotate in the opposite directions
shafts are arranged parallel and rotate in the same directions
shafts are arranged at right angles and rotate in one definite direction
driven shaft is to be started or stopped whenever desired without interferring with the driving shaft
✅ The correct answer is option B.
536. In unilateral system of tolerance, the tolerance is allowed on
one side of the actual size
one side of the nominal size
both sides of the actual size
both sides of the nominal size
✅ The correct answer is option B.
537. A transmission shaft includes
counter shaft
line shaft
over head shaft
all of these
✅ The correct answer is option D.
538. A column is known as a long column if the slenderness ratio is
40
50
70
100
✅ The correct answer is option D.
539. In a hydrodynamic lubricated bearing
there is a thick film of lubricant between the journal and the bearing
there is a thin film of lubricant between the journal and the bearing
there is no lubricant between the journal and the bearing
the lubricant is forced between the journal and the bearing, by external pressure
✅ The correct answer is option A.
540. The velocity of sliding __________ the distance of the point of contact from the pitch point.
is directly proportional to
is inversely proportional to
is equal to cos φ multiplied by
does not depend upon
✅ The correct answer is option A.