461. The radial distance of a tooth from the pitch circle to the top of the tooth is called
dedendum
addendum
clearance
working depth
✅ The correct answer is option B.
Machine Design MCQs
462. The endurance limit for a mirror polished material will be __________ as compared to unpolished material.
same
less
more
✅ The correct answer is option C.
463. The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that
it is subjected to a higher stress than the outer side
it is subjected to a higher cyclic loading than the outer side
it is more stretched than the outer side during the manufacturing process
it has a lower curvatu
✅ The correct answer is option B.
464. According to Indian standard specifications, a plain carbon steel designated by 40C8 contains carbon
0.20 to 0.40%
0.35 to 0.45%
0.40 to 0.60%
none of these
✅ The correct answer is option B.
465. Deep groove ball bearings are used for
heavy thrust load only
small angular displacement of shafts
radial load at high speed
combined thrust and ra
✅ The correct answer is option D.
466. The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)
d/8
d/6
d/4
d/2
✅ The correct answer is option C.
467. According to I.B.R., the thickness of the boiler shell should not be less than
4 mm
5 mm
6 mm
7 mm
✅ The correct answer is option D.
468. For low and moderate speed engines, the cam follower should move with
uniform velocity
simple harmonic motion
uniform accleration and retardation
cycloidal motion
✅ The correct answer is option B.
469. A localised compressive stress at the area of contact between two members is known as
tensile stress
bending stress
bearing stress
shear stress
✅ The correct answer is option C.
470. In the calculation of induced shear stress in helical springs, the Wahl’s stress factor is used to take care of
combined effect of transverse shear stress and bending stress in the wire
combined effect of bending stress and curvature of the wire
combined effect of transverse shear stress and curvature of wire
combined effect of tor
✅ The correct answer is option B.