21. The shear force of a cantilever beam of length l carrying a uniformly distributed load of w per unit length is __________ at the free end.
zero
wl/4
wl/2
wl
✅ The correct answer is option A.
Strength of Materials MCQs
22. When a body is subjected to a direct tensile stress (σ) in one plane, the maximum shear stress is __________ the maximum normal stress.
equal to
one-half
two-third
twice
✅ The correct answer is option B.
23. Strain is equal to (where l = Original length, and δl = Change in length)
l/δl
δl/l
l.δl
l + δl
✅ The correct answer is option B.
24. When a change in length takes place, the strain is known as
linear strain
lateral strain
volumetric strain
shear strain
✅ The correct answer is option A.
27. The maximum shear stress developed in a beam of circular section is __________ the average shear stress.
equal to
4/3 times
1.5 times
twice
✅ The correct answer is option B.
28. In a watch, the spring is used to store strain energy. This energy is released
to stop the watch
to run the watch
to change the time
all of these
✅ The correct answer is option B.
29. When a body is subjected to a direct tensile stress (σ) in one plane, then maximum normal stress occurs at a section inclined at __________ to the normal of the section.
0°
30°
45°
90°
✅ The correct answer is option A.
30. If percentage reduction in area of a certain specimen made of material ‘A’ under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material ‘B’ is 40%, then
the material A is more ductile than material B
the material B is more ductile than material A
the ductility of material A and B is equal
the material A is brit
✅ The correct answer is option A.