Theory Of Structures MCQ Questions & Answers

51

Gradually applied static loads do not change with time their

A) Magnitude B) Direction C) Point of application D) All the above

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Answer & Solution

Answer: Option D

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52

The yield moment of a cross section is defined as the moment that will just produce the yield stress in

A) The outer most fibre of the section B) The inner most fibre of the section C) The neutral fibre of the section D) The fibre everywhere

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Answer & Solution

Answer: Option A

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53

Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as

A) Compound beams B) Indeterminate beams C) Determinate beams D) Composite beams

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Answer & Solution

Answer: Option D

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54

At yield point of a test piece, the material

A) Obeys Hooke’s law B) Behaves in an elastic manner C) Regains its original shape on removal of the load D) Undergoes plastic deformation

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Answer: Option D

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55

The load on a spring per unit deflection, is called

A) Stiffness B) Proof resilience C) Proof stress D) Proof load

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Answer & Solution

Answer: Option A

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56

A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm², the bending strain energy stored in the bar, is

A) 411 N mm B) 511 N mm C) 611 N mm D) 711 N mm

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Answer & Solution

Answer: Option C

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57

A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm² is:

A) 4.0 mm B) 4.5 mm C) 5.0 mm D) 5.5 mm

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Answer & Solution

Answer: Option C

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58

For beams of uniform strength, if depth is constant,

A) Width $${\text{b}} \propto {\text{M}}$$ B) Width $${\text{b}} \propto \sqrt {\text{M}} $$ C) Width $${\text{b}} \propto 3\sqrt {\text{M}} $$ D) Width $${\text{b}} \propto \frac{1}{{\text{M}}}$$

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Answer: Option A

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59

A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised

A) Steel experiences tensile force B) Brass experiences compressive force C) Composite beam gets subjected to a couple D) All the above

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Answer & Solution

Answer: Option D

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60

A compound bar consists of two bars of equal length. Steel bar cross-section is 3500 mm² and that of brass bar is 3000 mm². These are subjected to a compressive load 1,00,000 N. If E_b = 0.2 MN/mm² and E_b = 0.1 MN/mm², the stresses developed are:

A) $${\sigma _{\text{b}}}$$ = 10 N/mm², $${\sigma _{\text{s}}}$$ = 20 N/mm² B) $${\sigma _{\text{b}}}$$ = 8 N/mm², $${\sigma _{\text{s}}}$$ = 16 N/mm² C) $${\sigma _{\text{b}}}$$ = 6 N/mm², $${\sigma _{\text{s}}}$$ = 12 N/mm² D) $${\sigma _{\text{b}}}$$ = 5 N/mm², $${\sigma _{\text{s}}}$$ = 10 N/mm²

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Answer & Solution

Answer: Option A

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Theory Of Structures MCQ Questions & Answers | Civil Engineering