Engineering Mechanics MCQ Questions & Answers

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Each section contains 100 MCQs on Engineering Mechanics .

The unit of work or energy in S.I. units is

A) Newton B) Pascal C) Watt D) Joule

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is

A) $$\frac{{{\text{b}}{{\text{h}}^3}}}{4}$$ B) $$\frac{{{\text{b}}{{\text{h}}^3}}}{8}$$ C) $$\frac{{{\text{b}}{{\text{h}}^3}}}{{12}}$$ D) $$\frac{{{\text{b}}{{\text{h}}^3}}}{{36}}$$

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________ $$\sqrt {\frac{{{\text{gra}}}}{{\text{h}}}} .$$

A) Less than B) Greater than C) Equal to D) None of these

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The efficiency of a screw jack is maximum, when (where $$\alpha $$ = Helix angle and $$\varphi $$ = Angle of friction.)

A) $$\alpha = {45^ \circ } + \frac{\varphi }{2}$$ B) $$\alpha = {45^ \circ } - \frac{\varphi }{2}$$ C) $$\alpha = {90^ \circ } + \varphi $$ D) $$\alpha = {90^ \circ } - \varphi $$

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Efficiency of a screw jack is given by (where $$\alpha $$ = Helix angle and $$\varphi $$ = Angle of friction.)

A) $$\frac{{\tan \left( {\alpha + \varphi } \right)}}{{\tan \alpha }}$$ B) $$\frac{{\tan \alpha }}{{\tan \left( {\alpha + \varphi } \right)}}$$ C) $$\frac{{\tan \left( {\alpha - \varphi } \right)}}{{\tan \alpha }}$$ D) None of these

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

In a screw jack, the effort required to lift the load is given by (where W = Load lifted, α = Helix angle, and φ = Angle of friction.)

A) P = W tan (α - φ) B) P = W tan (α + φ) C) P = W tan (φ - α) D) P = W cos (α + φ)

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Joule is the unit of

A) Force B) Work C) Power D) Velocity

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

When trying to turn a key into a lock, following is applied

A) Coplanar force B) Non-coplanar forces C) Moment D) Couple

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Kinetic friction is the

A) Tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction B) Ratio of limiting friction and normal reaction C) The friction force acting when the body is just about to move D) The friction force acting when the body is in motion

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

100

Two non-collinear parallel equal forces acting in opposite direction

A) Balance each other B) Constitute a moment C) Constitute a couple D) Constitute a moment of couple

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

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Engineering Mechanics MCQ Questions & Answers | Mechanical Engineering