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 43 of 48

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Q421.
The component of the acceleration, perpendicular to the velocity of the particle, at the given instant is called

a.

radial component

b.

tangential component

c.

coriolis component

d.

none of these

Discuss
Answer: (a).radial component
Q422.
The maximum efficiency of spiral gears is (where ฮธ = Shaft angle, and ฯ† = Friction angle)

a.

sin (ฮธ + ฯ†) + 1/ cos (ฮธ - ฯ†) + 1

b.

cos (ฮธ - ฯ†) + 1/ sin (ฮธ + ฯ†) + 1

c.

cos (ฮธ + ฯ†) + 1/ cos (ฮธ - ฯ†) + 1

d.

cos (ฮธ - ฯ†) + 1/ cos (ฮธ + ฯ†) + 1

Discuss
Answer: (c).cos (ฮธ + ฯ†) + 1/ cos (ฮธ - ฯ†) + 1
Q423.
When the crank is at the inner dead centre, in a reciprocating steam engine, then the acceleration of the piston will be

a.

ฯ‰²r. (n + 1)/n

b.

ฯ‰²r. (n - 1)/n

c.

ฯ‰²r. n/(n + 1)

d.

ฯ‰²r. n/(n - 1)

Discuss
Answer: (a).ฯ‰²r. (n + 1)/n
Q424.
When the tip of a tooth undercuts the root on its mating gear, it is known as interference.

a.

Agree

b.

Disagree

c.

Can't say

d.

None of these

Discuss
Answer: (a).Agree
Q425.
Under logarithmic decrement, the amplitude of successive vibrations are

a.

constant

b.

in arithmetic progression

c.

in geometric progression

d.

in logarithmic progression

Discuss
Answer: (c).in geometric progression
Q426.
The efficiency of a screw jack is maximum, when (where ฮฑ = Helix angle, and ฯ† = Angle of friction)

a.

ฮฑ = 45° + ฯ†/2

b.

ฮฑ = 45° - ฯ†/2

c.

ฮฑ = 90° + ฯ†

d.

ฮฑ = 90° - ฯ†

Discuss
Answer: (b).ฮฑ = 45° - ฯ†/2
Q427.
A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of arm about the centre of bigger gear is

a.

2

b.

3

c.

4

d.

5

Discuss
Answer: (d).5
Q428.
In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is Constant, then

a.

open belt drive is recommended

b.

crossed belt drive is recommended

c.

both open belt drive and crossed belt drive is recommended

d.

the drive is recommended depending upon the torque transmitted

Discuss
Answer: (b).crossed belt drive is recommended
Q429.
The critical speed of a shaft depends upon its

a.

mass

b.

stiffness

c.

mass and stiffness

d.

stiffness and eccentricity

Discuss
Answer: (c).mass and stiffness
Q430.
Which of the following mechanism is an approximate straight line motion mechanism?

a.

Watt's mechanism

b.

Grasshopper mechanism

c.

Robert's mechanism

d.

all of these

Discuss
Answer: (d).all of these
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