Engineering Mechanics MCQ Questions & Answers

31

The maximum velocity of a particle moving with simple harmonic motion is

A) $$\omega $$ B) $$\omega {\text{r}}$$ C) $${\omega ^2}{\text{r}}$$ D) $$\frac{\omega }{{\text{r}}}$$

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Answer & Solution

Answer: Option B

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32

A particle inside a hollow sphere of radius r, having coefficient of friction µ can rest up to height of

A) $$\frac{{\text{r}}}{2}$$ B) $$\frac{{\text{r}}}{{\text{A}}}$$ C) $$\frac{{\text{r}}}{3}$$ D) 0.134 r

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Answer & Solution

Answer: Option D

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33

The centre of gravity of a uniform lamina lies at

A) The centre of heavy portion B) The bottom surface C) The midpoint of its axis D) All of the above

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Answer & Solution

Answer: Option C

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34

The range of projectile on a downward inclined plane is ________ the range on upward inclined plane for the same velocity of projection and angle of projection.

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

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Answer & Solution

Answer: Option B

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35

The coefficient of restitution for inelastic bodies is

A) Zero B) One C) Between zero and one D) More than one

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Answer & Solution

Answer: Option A

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36

A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to

A) 25 B) 50 C) 100 D) 250

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Answer & Solution

Answer: Option B

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37

Which of the following is a scalar quantity?

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

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Answer & Solution

Answer: Option B

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38

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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39

Which of the following statement is correct?

A) The periodic time of a particle moving with simple harmonic motion is the time taken by a particle for one complete oscillation B) The periodic time of a particle moving with simple harmonic motion is directly proportional to its angular velocity C) The velocity of the particle moving with simple harmonic motion is zero at the mean position D) The acceleration of the particle moving with simple harmonic motion is maximum at the mean position

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Answer & Solution

Answer: Option A

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40

Which of the following statement is correct?

A) The kinetic energy of a body during impact remains constant B) The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact C) The kinetic energy of a body before impact is less than the kinetic energy of a body after impact D) The kinetic energy of a body before impact is more than the kinetic energy of a body after impact

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Answer & Solution

Answer: Option D

Solution:

During an impact, some of the kinetic energy is lost due to deformation, heat, and sound.

As a result, the kinetic energy of a body before impact is typically more than the kinetic energy after the impact.

This loss of energy depends on the coefficient of restitution and the nature of the materials involved in the impact.

Engineering Mechanics MCQ Questions & Answers | Mechanical Engineering