421. A steel containing 0.8% carbon is known as
eutectoid steel
hyper-eutectoid steel
hypo-eutectqid steel
none of these
✅ The correct answer is option A.
Machine Design MCQs
422. The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is
1-Feb
1
2
4
✅ The correct answer is option C.
423. The ratio of endurance limit in shear to the endurance limit in flexure is
0.25
0.4
0.55
0.7
✅ The correct answer is option C.
425. The yield point in static loading is __________ as compared to fatigue loading.
higher
lower
same
✅ The correct answer is option A.
426. A cotter joint is used to connect two __________ rods.
co-axial
perpendicular
parallel
✅ The correct answer is option A.
427. The dynamic tooth load is due to
inaccuracies of tooth spacing
irregularities in tooth profiles
deflections of teeth under load
all of these
✅ The correct answer is option D.
428. For circumferential joint in boilers, the type of joint used is
butt joint with single cover plate
butt joint with double cover plate
lap joint with one ring overlapping the other
any one of the above
✅ The correct answer is option C.
429. When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is
0.2
0.35
0.5
0.65
✅ The correct answer is option C.