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 45 of 48

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Q441.
The ratio of maximum fluctuation of energy to the workdone per cycle is called

a.

fluctuation of energy

b.

maximum fluctuation of energy

c.

coefficient of fluctuation of energy

d.

none of these

Discuss
Answer: (c).coefficient of fluctuation of energy
Q442.
In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the steam lap and the angle of advance of the eccentric but keeping constant the travel and lead of the valve, This method will

a.

cause withdrawing or throttling of steam

b.

reduce length of effective stroke of piston

c.

reduce maximum opening of port to steam

d.

all of these

Discuss
Answer: (c).reduce maximum opening of port to steam
Q443.
In a differential band brake as shown in the below figure, if the length OB is greater than OA, then the force P at C should act in the downward direction.

a.

Yes

b.

No

c.

May be yes or no

d.

Can't say

Discuss
Answer: (b).No
Q444.
ABCD is a four bar mechanism in which AB = 310 mm and CD = 450 mm. AB and CD are both perpendicular to the fixed link AD, as shown in the below figure. If the velocity of B at this condition is v. Then the velocity of C is

a.

v

b.

2v/3

c.

3v/2

d.

9v/4

Discuss
Answer: (c).3v/2
Q445.
A torsional system with discs of moment of inertia I1 and I2 as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q446.
The centre of suspension and centre of percussion are not interchangeable.

a.

Correct

b.

Incorrect

c.

Can't say

d.

None of these

Discuss
Answer: (b).Incorrect
Q447.
The size of cam depends upon

a.

base circle

b.

pitch circle

c.

prime circle

d.

pitch curve

Discuss
Answer: (a).base circle
Q448.
In an open pair, the two elements of a pair

a.

have a surface contact when in motion

b.

have a line or point contact when in motion

c.

are kept in contact by the action of external forces, when in motion

d.

are not held together mechanically

Discuss
Answer: (d).are not held together mechanically
Q449.
The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r1 and r2 = External and internal radii of collar respectively)

a.

(1/2) ΞΌ W (r₁ + rβ‚‚)

b.

(2/3) ΞΌ W (r₁ + rβ‚‚)

c.

(1/2) ΞΌ W [(r₁³ - rβ‚‚³)/(r₁² - rβ‚‚²)]

d.

(2/3) ΞΌ W [(r₁³ - rβ‚‚³)/(r₁² - rβ‚‚²)]

Discuss
Answer: (a).(1/2) ΞΌ W (r₁ + rβ‚‚)
Q450.
Efficiency of a screw jack is given by

a.

tan (Ξ± + Ο†)/tanΞ±

b.

tanΞ±/tan (Ξ± +Ο†)

c.

tan (Ξ± - Ο†)/tanΞ±

d.

tanΞ±/tan (Ξ± - Ο†)

Discuss
Answer: (b).tanΞ±/tan (Ξ± +Ο†)
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