481. Idler pulley is used for
increasing velocity ratio
for applying tension
changing the direction of motion of belt
all of these
✅ The correct answer is option B.
Machine Design MCQs
482. In the levers of first type, the mechanical advantage is __________ one.
less than
equal to
more than
✅ The correct answer is option C.
483. A cotter joint is used to transmit
axial tensile load only
axial compressive load only
combined axial and twisting loads
axial tensile or compr
✅ The correct answer is option D.
484. Lewis form factor for composite and full depth involute system is (where T = Number of teeth)
none of these
✅ The correct answer is option A.
485. An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the
tip of the gear and flank of pinion
tip of the pinion and flank of gear
flanks of both gear and pinion
tip of both gear and p
✅ The correct answer is option A.
486. Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.
twice
four times
eight times
sixteen times
✅ The correct answer is option C.
487. In a bolt, the plane of shear should be across the threaded portion of the shank.
Correct
Incorrect
✅ The correct answer is option B.
488. In designing a sleeve coupling, length of the sleeve is taken as (where d = Diameter of the shaft)
d + 17 mm
2 d + 13 mm
2 d + 20 mm
3.5 d
✅ The correct answer is option D.
489. In a butt welded joint, the size of weld is __________ the throat of weld.
0.5 times
equal to
2 times
double
✅ The correct answer is option B.
490. The material used for brake lining should have __________ coefficient of friction.
low
high
✅ The correct answer is option B.