441. The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)
✅ The correct answer is option A.
Machine Design MCQs
442. The maximum normal stress theory is used for
brittle materials
ductile materials
plastic materials
non-ferrous materials
✅ The correct answer is option A.
443. A hollow saddle key is
a taper key which fits half in the key way of hub and half in the key way of shaft
a taper key which fits in a key way of the hub and is flat on the shaft
a taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
provided in pairs at r
✅ The correct answer is option C.
444. When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is
tensile stress
compressive stress
shear stress
bending stress
✅ The correct answer is option C.
445. According to I.B.R., the factor of safety of riveted joint should not be less than
1
2
3
4
✅ The correct answer is option D.
446. The cap screws are
slotted for a screw driver and are generally used with a nut
similar to tap bolts except that they are of small size and a variety of shapes of heads are available
used to prevent relative motion between the two parts
none of the above
✅ The correct answer is option B.
447. Which one of the following loading is considered for the design of axles?
Bending moment only
Twisting moment only
Combined bending moment and twisting moments
Combined action of ben
✅ The correct answer is option A.
448. For high speed engines, the cam follower should move with
uniform velocity
simple harmonic motion
uniform accleration and retardation
cycloidal motion
✅ The correct answer is option D.
449. The ratio of number of teeth to the pitch circle diameter in millimetres is called circular pitch.
Agree
Disagree
✅ The correct answer is option B.
450. The function of the washer is to
fill up the axial gap
provide bearing area
provide cushioning effect
absorb shocks and vibr
✅ The correct answer is option B.