Strength Of Materials MCQ Questions & Answers

51

The assumption made in the theory of the reinforced cement concrete beam is that

A) All the tensile stresses are taken up by the steel reinforcement only B) There is a sufficient bond between steel and concrete C) The steel and concrete are stressed within its elastic limit D) All of the above

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Answer & Solution

Answer: Option D

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52

The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)

A) $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$ B) $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$ C) $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$ D) $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$

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Answer & Solution

Answer: Option B

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53

Young’s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length by

A) Half B) Same amount C) Double D) One-fourth

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Answer & Solution

Answer: Option B

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54

In order to avoid tearing off the plate at an edge, the distance from the center of the rivet hole to the nearest edge of the plate (i.e. margin) should be (where d = Diameter of rivet hole in mm)

A) d B) 1.5 d C) 2 d D) 2.5 d

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Answer & Solution

Answer: Option B

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55

It equal and opposite forces applied to a body tend to elongate it, the stress so produced is called

A) Internal resistance B) Tensile stress C) Transverse stress D) Compressive stress

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Answer & Solution

Answer: Option B

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56

Rupture stress is

A) Breaking stress B) Maximum load/original cross-sectional area C) Load at breaking point/Area D) Load at breaking point/neck area

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Answer & Solution

Answer: Option D

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57

The relation between Young's modulus (E) and bulk modulus (K) is given by

A) $${\text{K}} = \frac{{3{\text{m}} - 2}}{{{\text{mE}}}}$$ B) $${\text{K}} = \frac{{{\text{mE}}}}{{3{\text{m}} - 2}}$$ C) $${\text{K}} = \frac{{3\left( {{\text{m}} - 2} \right)}}{{{\text{mE}}}}$$ D) $${\text{K}} = \frac{{{\text{mE}}}}{{3\left( {{\text{m}} - 2} \right)}}$$

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Answer & Solution

Answer: Option D

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58

The relation between Young's modulus (E), shear modulus (C) and bulk modulus (K) is given by

A) $${\text{E}} = \frac{{3{\text{KC}}}}{{3{\text{K}} + {\text{C}}}}$$ B) $${\text{E}} = \frac{{6{\text{KC}}}}{{3{\text{K}} + {\text{C}}}}$$ C) $${\text{E}} = \frac{{9{\text{KC}}}}{{3{\text{K}} + {\text{C}}}}$$ D) $${\text{E}} = \frac{{12{\text{KC}}}}{{3{\text{K}} + {\text{C}}}}$$

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Answer & Solution

Answer: Option C

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59

Lame's theory is associated with

A) Thin cylindrical shells B) Thick cylindrical shells C) Direct and bending stresses D) None of these

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Answer & Solution

Answer: Option B

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60

Fatigue test is carried out for

A) Stresses varying between two limits of equal value, but of opposite sign B) Stresses varying between two limits of unequal value, but of opposite sign C) Stresses varying between two limits of unequal value but of same sign D) All of the above

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Answer & Solution

Answer: Option D

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

Strength Of Materials MCQ Questions & Answers | Mechanical Engineering