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!

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Theory of machines MCQs | Page 10 of 48

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Q91.
A body is said to be under forced vibrations, when

a.

there is a reduction in amplitude after every cycle of vibration

b.

no external force acts on a body, after giving it an initial displacement

c.

a body vibrates under the influence of external force

d.

none of the above

Discuss
Answer: (a).there is a reduction in amplitude after every cycle of vibration
Q92.
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and ฮด = Static deflection of the body)

a.

1/2ฯ€ × โˆš(s/m)

b.

1/2ฯ€ × โˆš(g/ฮด)

c.

0.4985/โˆšฮด

d.

any one of these

Discuss
Answer: (d).any one of these
Q93.
The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft, and tan ฯ† = Coefficient of friction between the shaft and bearing)

a.

r sin ฯ†

b.

r cos ฯ†

c.

r tan ฯ†

d.

None of these

Discuss
Answer: (a).r sin ฯ†
Q94.
The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where ฮผ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

a.

ฮผ W R

b.

ฮผ W R

c.

ฮผ W R

d.

ฮผ W R

Discuss
Answer: (d).ฮผ W R
Q95.
If the damping factor for a vibrating system is unity, then the system will be

a.

over damped

b.

under damped

c.

critically damped

d.

without vibrations

Discuss
Answer: (c).critically damped
Q96.
In vibration isolation system, if ฯ‰/ฯ‰n < 2, then for all values of damping factor, the trans-missibility will be (where ฯ‰ = Angular speed of the system, ฯ‰n = Natural frequency of vibration of the system)

a.

less than unity

b.

equal to unity

c.

greater than unity

d.

zero

Discuss
Answer: (c).greater than unity
Q97.
When a point at the end of a link moves with constant angular velocity, its acceleration will have

a.

radial component only

b.

tangential component only

c.

coriolis component only

d.

radial and tangential components both

Discuss
Answer: (a).radial component only
Q98.
The time taken by a particle for one complete oscillationis known as periodic time.

a.

Agree

b.

Disagree

c.

Can't say

d.

None of these

Discuss
Answer: (a).Agree
Q99.
The danger of breakage and vibration is maximum

a.

below the critical speed

b.

near the critical speed

c.

above the critical speed

d.

none of these

Discuss
Answer: (b).near the critical speed
Q100.
The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ฯ‰ = Angular speed of crank, r = Radius of crank, ฮธ = Angle of inclination of crank with the line of stroke, and n = Ratio of the lengm of connecting rod to radius of crank)

a.

m.ฯ‰².r sin ฮธ

b.

m.ฯ‰².r cos ฮธ

c.

m.ฯ‰².r

d.

m.ฯ‰².r

Discuss
Answer: (b).m.ฯ‰².r cos ฮธ
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