SECTION-3

#### Strength of Material MCQ

##### Q31. With elastic limit in a loaded material, stress is

(a) inversely proportional to strain
(b) directly proportional to strain
(c) equal to strain
(d) none of the above.

Ans:(b) directly proportional to strain

##### Q32. The ratio of linear stress to linear strain is known as

(a) Poisson’s ratio
(b) bulk modulus
(c) modulus of rigidity
(d) modulus of elasticity.

Ans:(d) modulus of elasticity.

##### Q33. The ratio of lateral strain to longitudinal strain is called

(a) Poisson’s ratio
(b) bulk modulus
(c) modulus of rigidity
(d) modulus of elasticity.

Ans:(a) Poisson’s ratio

##### Q34. The ratio of shear stress to shear strain is called

(a) Poisson’s ratio
(b) bulk modulus
(c) modulus of rigidity
(d) modulus of elasticity.

Ans:(c) modulus of rigidity

##### Q35. The ratio of normal stress of each face of a solid cube to volumetric strain is called

(a) Poisson’s ratio
(b) bulk modulus
(c) modulus of rigidity
(d) modulus of elasticity.

Ans:(b) bulk modulus

(a) 1 cm
(b) 0.2 cm
(c) 0.1 cm
(d) 0.15 cm.

Ans:(c) 0.1 cm

(a) N/m
(b) N/m2
(c) Nm/S
(d) no unit.

Ans:(b) N/m2

##### Q38. The stress at any section of a rod (due to its own weight) of length (l) and diameter (d) rigidly fixed at the upper end and hanging is

(a) directly proportional to x
(b) inversely proportional to x
(c) directly proportional to x
(d) inversely proportional to x
where x = Distance of section from the lower end.

Ans:(a) directly proportional to x

##### Q39. The elongation produced in a rod (by its own weight) of length (l) and diameter (d) rigidly fixed at the upper end and hanging is equal to

(a)  wl/2E
(b)  wl2/2E
(c)  wl3/2E
(d)  wl4/2E
where w = Weight per unit volume of the rod, E = Modulus of elasticity.

Ans:(b)  wl2/2E

##### Q40. The ratio of modulus of rigidity to modulus of elasticity for a Poisson’s ratio of 0.25 would be

(a) 0.5
(b) 0.4
(c) 0.3
(d) 1.0

Ans:(b) 0.4

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##### Read More Sections of Strength of Material

Each section contains maximum 80 Questions. To practice more questions visit other sections.

Strength of Material MCQ – Section-1

Strength of Material MCQ – Section-2

Strength of Material MCQ – Section-3

Strength of Material MCQ – Section-4

Strength of Material MCQ – Section-5

Strength of Material MCQ – Section-6