Engineering Mechanics MCQ Questions & Answers

1

Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

A) 20 N B) 40 N C) 120 N D) None of these

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Answer & Solution

Answer: Option A

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2

The static friction

A) Bears a constant ratio to the normal reaction between the two surfaces B) Is independent of the area of contact, between the two surfaces C) Always acts in a direction, opposite to that in which the body tends to move D) All of the above

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Answer & Solution

Answer: Option D

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3

In the shown figure, the tension (T) in the string will be
Engineering Mechanics mcq question image

A) $$\frac{{{{\text{m}}_1}{{\text{m}}_2}{\text{g}}}}{{{{\text{m}}_1} + {{\text{m}}_2}}}$$ B) $$\frac{{2{{\text{m}}_1}{{\text{m}}_2}{\text{g}}}}{{{{\text{m}}_1} + {{\text{m}}_2}}}$$ C) $$\frac{{{{\text{m}}_1} + {{\text{m}}_2}}}{{{{\text{m}}_1}{{\text{m}}_2}{\text{g}}}}$$ D) $$\frac{{{{\text{m}}_1} + {{\text{m}}_2}}}{{2{{\text{m}}_1}{{\text{m}}_2}{\text{g}}}}$$

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Answer & Solution

Answer: Option B

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4

The term 'Centroid' is

A) The same as centre of gravity B) The point of suspension C) The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis D) None of the above

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Answer & Solution

Answer: Option A

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5

Two blocks ‘A’ and ‘B’ of masses 150 kg and 50 kg respectively are connected by means of a string as shown in the below figure. The tension in all the three strings __________ be same.
Engineering Mechanics mcq question image

A) Will B) Will not C) Either A or B D) None of these

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Answer & Solution

Answer: Option A

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6

The unit of angular acceleration is

A) N-m B) m/s C) m/s² D) rad/s²

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Answer & Solution

Answer: Option D

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7

The unit of angular velocity is

A) M/min B) Rad/s C) Revolutions/min D) Both (B) and (C)

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Answer & Solution

Answer: Option D

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8

The unit of force in S.I. units is

A) Kilogram B) Newton C) Watt D) Dyne

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Answer & Solution

Answer: Option B

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9

The unit of work in S.I. units is

A) Newton B) Erg C) Kg-m D) Joule

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Answer & Solution

Answer: Option D

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10

The weight of a body is due to

A) Gravitational pull exerted by the earth B) Forces experienced by body in atmosphere C) Force of attraction experienced by particles D) Gravitational force of attraction towards the centre of the earth

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Answer & Solution

Answer: Option D

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Engineering Mechanics MCQ Questions & Answers | Mechanical Engineering