Strength Of Materials MCQ Questions & Answers

21

Which of the following is a vector quantity

A) Energy B) Mass C) Momentum D) Angle

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Answer & Solution

Answer: Option C

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22

Which of the following is not a vector quantity

A) Weight B) Velocity C) Acceleration D) Force

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Answer & Solution

Answer: Option A

Solution:

Option A: Weight
Weight is a vector quantity as it has both magnitude and direction (directed towards the center of the Earth).

Option B: Velocity
Velocity is a vector quantity because it represents both the speed and direction of an object.

Option C: Acceleration
Acceleration is also a vector quantity, as it defines the rate of change of velocity and includes direction.

Option D: Force
Force is a vector quantity, as it has both magnitude and direction, acting on an object to cause acceleration.

Correct Explanation: While all the options might seem to have directional attributes, **Weight** is actually a vector quantity.

There is no option in the given choices that represents a scalar (non-vector) quantity.

23

Effect of a force on a body depends upon

A) Magnitude B) Direction C) Position or line of action D) All of the above

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Answer & Solution

Answer: Option D

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24

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

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Answer & Solution

Answer: Option D

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25

According to principle of transmissibility of forces, the effect of a force upon a body is

A) Maximum when it acts at the center of gravity of a body B) Different at different points in its line of action C) The same at every point in its line of action D) Minimum when it acts at the C.G. of the body

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Answer & Solution

Answer: Option C

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26

The centre of gravity (C.G.) of a solid hemisphere lies on the central radius

A) At distance $$\frac{{3{\text{r}}}}{2}$$ from the plane base B) At distance $$\frac{{3{\text{r}}}}{4}$$ from the plane base C) At distance $$\frac{{3{\text{r}}}}{5}$$ from the plane base D) At distance $$\frac{{3{\text{r}}}}{8}$$ from the plane base

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Answer & Solution

Answer: Option D

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27

D'Alembert's principle is used for

A) Reducing the problem of kinetics to equivalent statics problem B) Determining stresses in the truss C) Stability of floating bodies D) Designing safe structures

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Answer & Solution

Answer: Option A

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28

Tangent of angle of friction is equal to

A) Kinetic friction B) Limiting friction C) Angle of repose D) Coefficient of friction

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Answer & Solution

Answer: Option D

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29

A force is completely defined when we specify

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

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Answer & Solution

Answer: Option D

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30

A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve

A) Catenary B) Parabola C) Hyperbola D) Elliptical

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Answer & Solution

Answer: Option B

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Strength Of Materials MCQ Questions & Answers | Civil Engineering