Strength Of Materials MCQ Questions & Answers

1

The springs in brakes and clutches are used to

A) To apply forces B) To measure forces C) To store strain energy D) To absorb shocks

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Answer & Solution

Answer: Option A

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2

In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is

A) More B) Less C) Same D) More/less depending on composition

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Answer & Solution

Answer: Option B

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3

The stress developed in a material at breaking point in extension is called

A) Breaking stress B) Fracture stress C) Yield point stress D) Ultimate tensile stress

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Answer & Solution

Answer: Option A

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4

For steel, the ultimate strength in shear as compared to in tension is nearly

A) Same B) Half C) One third D) Two third

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Answer & Solution

Answer: Option B

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5

A tensile test is performed on a mild steel round bar. Its diameter after fracture will

A) Remain same B) Increase C) Decrease D) Depend upon rate of loading

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Answer & Solution

Answer: Option C

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6

The buckling load for a given material depends on

A) Slenderness ratio and area of cross-section B) Poisson's ratio and modulus of elasticity C) Slenderness ratio and modulus of elasticity D) Slenderness ratio, area of cross-section and modulus of elasticity

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Answer & Solution

Answer: Option D

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7

The Rankine's constant for a mild steel column with both ends hinged is

A) $$\frac{1}{{750}}$$ B) $$\frac{1}{{1600}}$$ C) $$\frac{1}{{7500}}$$ D) $$\frac{1}{{9000}}$$

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Answer & Solution

Answer: Option C

Solution:

We have defined the term Rankine constant in the previous section while deriving the alternate form of the Rankine formula. The Rankine constant denoted by 𝜶 was given as
α=σc/π2E
This Rankine constant is different for various materials. The Rankine constant for some of the materials used in the construction of columns is given in the table below:

Materials	Rankine Constant (α)
Wrought Iron	1/9000
Cast Iron	1/1600
Mild Steel	1/7500
Strong Timber	1/750

8

During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm². Ultimate tensile strength of specimen is

A) 4 tonnes/cm² B) 8 tonnes/cm² C) 16 tonnes/cm² D) 22 tonnes/cm²

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Answer & Solution

Answer: Option B

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9

A simply supported beam 'A' of length ‘l’, breadth ‘b’ and depth ‘d’ carries a central load ‘W’. Another beam 'B' of the same dimensions carries a central load equal to 2W. The deflection of beam 'B' will be __________ as that of beam 'A'.

A) One-fourth B) One-half C) Double D) Four times

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Answer & Solution

Answer: Option C

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10

Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter $$\frac{{\text{D}}}{2}.$$ The strength of shaft 'B' is _________ as that of shaft 'A'

A) One-eighth B) One-fourth C) One-half D) Four times

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Answer & Solution

Answer: Option A

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Strength Of Materials MCQ Questions &amp; Answers | Mechanical Engineering

Strength Of Materials MCQ Questions & Answers | Mechanical Engineering