Theory of machines MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Theory of machines, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Theory of machines MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Theory of machines mcq questions that explore various aspects of Theory of machines problems. Each MCQ is crafted to challenge your understanding of Theory of machines principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Theory of machines MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Theory of machines. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Theory of machines knowledge to the test? Let's get started with our carefully curated MCQs!

Theory of machines MCQs | Page 3 of 48

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Q21.
When the axes of the shafts, over which the gears are mounted, move relative to a fixed axis, then the train is known as reverted gear train.

a.

Right

b.

Wrong

c.

Can't say

d.

None of these

Discuss
Answer: (b).Wrong
Q22.
Two pulleys of radii r1 and r2 and at distance x apart are connected by means of a cross belt drive. The length of the belt is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q23.
A shaft of mass (mc) and stiffness (s) is fixed at one end and carries a mass (m) at the other end. The natural frequency of its longitudinal vibration is equal to

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q24.
The ratio of velocities of the shafts connected by Hooke's joint is given by (where N and N1 = Speed of driving and driven shafts (in r.p.m.) respectively, ฮธ = Angle through which the arms of the cross turn, and ฮฑ = Angle of inclination between the two shafts)

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q25.
In under damped vibrating system, if x1 and x2 are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q26.
For a twin cylinder V-engine, the crank positions for primary reverse cranks and secondary direct cranks are shown in the below figure. The engine is a

a.

30° V-engine

b.

60° V-engine

c.

120° V-engine

d.

150° V-engine

Discuss
Answer: (a).30° V-engine
Q27.
In under damped vibrating system, the amplitude of vibration

a.

decreases linearly with time

b.

increases linearly with time

c.

decreases exponentially with time

d.

increases exponentially with time

Discuss
Answer: (c).decreases exponentially with time
Q28.
The ratio of the actual damping coefficient to the critical damping coefficient is called damping factor.

a.

Yes

b.

No

c.

Can't say

d.

None of these

Discuss
Answer: (a).Yes
Q29.
When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to

a.

zero

b.

one

c.

ฯ€/2

d.

ฯ€

Discuss
Answer: (b).one
Q30.
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

a.

0.2

b.

0.4

c.

0.6

d.

0.8

Discuss
Answer: (c).0.6
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