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.
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
Q23.
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
Q24.
When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to

a.

zero

b.

one

c.

π/2

d.

π

Discuss
Answer: (b).one
Q25.
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
Q26.
In a coupling rod of a locomotive, each of the four pairs is a __________ pair.

a.

sliding

b.

turning

c.

rolling

d.

screw

Discuss
Answer: (b).turning
Q27.
The sliding pairs, turning pairs and screw pairs form lower pairs.

a.

True

b.

False

c.

Can't say

d.

None of these

Discuss
Answer: (a).True
Q28.
When a particle moves round the circumference of a circle of radius r with ω rad/s, then its maximum acceleration is ω²r.

a.

Right

b.

Wrong

c.

Can't say

d.

None of these

Discuss
Answer: (a).Right
Q29.
A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of

a.

2 mm

b.

2.22 mm

c.

2.50 mm

d.

3.0 mm

Discuss
Answer: (b).2.22 mm
Q30.
The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to

a.

90° and 180°

b.

45° and 225°

c.

180° and 270°

d.

270° and 360°

Discuss
Answer: (b).45° and 225°
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