381. The taper on a rectangular sunk key is
1 in 16
1 in 32
1 in 48
1 in 100
✅ The correct answer is option D.
Machine Design MCQs
382. The product of the diametral pitch and circular pitch is equal to
1
1/π
π
π x number of teeth
✅ The correct answer is option C.
383. A screw will be self locking, if
friction angle is less than helix angle
friction angle is more than helix angle
friction angle is equal to helix angle
efficiency of screw is
✅ The correct answer is option B.
384. In a flange coupling, the bolts are subjected to
tensile stress
compressive stress
shear stress
none of these
✅ The correct answer is option C.
385. The piston pin bearings in heavy duty diesel engines are
needle roller bearings
tapered rolierbearings
spherical roller bearings
cylindrical roller bea
✅ The correct answer is option A.
386. The buckling load will be maximum for a column, if
one end of the column is clamped and the other end is free
both ends of the column are clamped
both ends of the column are hinged
one end of the column
✅ The correct answer is option B.
387. A quarter turn belt drive is used when the shafts are arranged at right angles and rotate in one definite direction.
Yes
No
✅ The correct answer is option A.
388. Crowning on pulley helps
in decreasing the slip of the belt
in increasing the slip of the belt
to keep the belt in centre on a pulley while it is in motion
to increase pulley lif
✅ The correct answer is option C.
389. The Wahl’s stress factor (K) for springs is given by (where )
✅ The correct answer is option D.
390. A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as hollow saddle key.
Correct
Incorrect
✅ The correct answer is option A.