below the critical speed
near the critical speed
above the critical speed
none of these
✅ The correct answer is option B.
Mechanical Engineering MCQs
When a closely-coiled helical spring is subjected to an axial load, it is said to be under
bending
shear
torsion
crushing
✅ The correct answer is option C.
Ceramic tools are fixed to tool body by
soldering
brazing
welding
clamping
✅ The correct answer is option B.
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 friction present between the steam and the nozzle surfaces reduces the heat drop by
10 to 15 percent
15 to 25 percent
25 to 40 percent
40 to 60 percent
✅ The correct answer is option A.
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.
The motion between a pair which takes place in __________ is known as incompletely constrained motion.
one direction only
more than one direction
✅ The correct answer is option B.
In TIG arc welding, the welding zone is shielded by an atmosphere of
helium gas
argon gas
either (a) or (b)
none of these
✅ The correct answer is option C.
If the ratio of corresponding velocities at corresponding points are equal, then the model and the prototype are said to have dynamic similarity.
Correct
Incorrect
✅ The correct answer is option B.