diameter of both the shafts is same
angle of twist of both the shafts is same
material of both the shafts is same
twisting moment of bot
✅ The correct answer is option D.
Machine Design MCQs
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.
larger than
smaller than
equal to
✅ The correct answer is option B.
Multiple threads are used to secure
low efficiency
high efficiency
high load lifting capacity
high mechanical advant
✅ The correct answer is option B.
Guest’s theory is used for
brittle materials
ductile materials
elastic materials
plastic materials
✅ The correct answer is option B.
The surface finish factor for a mirror polished material is
0.45
0.65
0.85
1
✅ The correct answer is option D.
For a bevel gear having the pitch angle θ , the ratio of formative number of teeth (TE) to actual number of teeth (T) is
1/sin θ
1/cos θ
1/tan θ
sin θ cos θ
✅ The correct answer is option B.
The effective stress in wire ropes during normal working is equal to the stress due to
axial load plus stress due to bending
acceleration/retardation of masses plus stress due to bending
axial load plus stress due to acceleration/retardation
bending plus stress du
✅ The correct answer is option A.
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.
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.
In a bolt, the plane of shear should be across the threaded portion of the shank.
Correct
Incorrect
✅ The correct answer is option B.