311. The lower layer of the beam as shown in the below figure, will be
in tension
in compression
neither in tension nor in compression
✅ The correct answer is option A.
Strength of Materials MCQs
312. The Young’s modulus of a material is 125 GPa and Poissons ratio is 0.25. The modulus of rigidity of me material is
30 GPa
50 GPa
80 GPa
100 GPa
✅ The correct answer is option B.
313. The hoop stress in a thin cylindrical shell is
longitudinal stress
compressive stress
radial stress
circumferential tensil
✅ The correct answer is option D.
314. Two solid shafts ‘A’ and ‘B’ are made of the same material. The shaft ‘A’ is of 50 mm diameter and shaft ‘B’ is of 100 mm diameter. The strength of shaft ‘B’ is __________ as that of shaft A.
one-half
double
four times
eight times
✅ The correct answer is option D.
315. In the below figure, the point E represents the maximum stress.
TRUE
FALSE
✅ The correct answer is option B.
316. Fatigue test is carried out for
stresses varying between two limits of equal value, but of opposite sign
stresses varying between two limits of unequal value, but of opposite sign
stresses varying between two limits of unequal value but of same sign
all of the above
✅ The correct answer is option D.
317. The tensile strength of ductile materials is __________ its compressive strength.
equal to
less than
greater than
✅ The correct answer is option C.
319. Modular ratio of the two materials is the ratio of
linear stress to linear strain
shear stress to shear strain
their modulus of elasticities
their modulus of rigid
✅ The correct answer is option C.
320. The polar moment of inertia of a hollow shaft of outer diameter (D) and inner diameter (d) is
✅ The correct answer is option C.