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 28 of 48

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Q271.
A rotor supported at A and B carries two masses as shown in the below figure. The rotor is

a.

dynamically balanced

b.

statically balanced

c.

statically and dynamically balanced

d.

not balanced

Discuss
Answer: (c).statically and dynamically balanced
Q272.
In the two rotor system as shown in the below figure (I1 < I2), a node of vibration is situated

a.

between I1, and I2 but nearer I1

b.

between I1, and I2 but nearer to I2

c.

exactly in the middle of the shaft

d.

nearer to I1 but outside

Discuss
Answer: (b).between I1, and I2 but nearer to I2
Q273.
In the below figure, PC is the connecting rod and OC is the crank making an angle ฮธ with the line of stroke PO and rotates with uniform angular velocity at ฯ‰ rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral C Q NO, the acceleration of the piston is zero when the crank OC and connecting rod PC are at right angles to each other.

a.

Correct

b.

Incorrect

c.

May be correct or incorrect

d.

None of these

Discuss
Answer: (a).Correct
Q274.
For the brake to be self locking, the force P at C shown in the below figure, should

a.

be zero

b.

act in upward direction

c.

act in downward direction

d.

none of these

Discuss
Answer: (a).be zero
Q275.
In the below figure, PC is the connecting rod and OC is the crank making an angle ฮธ with the line of stroke PO and rotates with uniform angular velocity at ฯ‰ rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral C Q NO, if N coincides with O, then

a.

acceleration and velocity of the piston P is zero

b.

acceleration and velocity of the piston P is maximum

c.

acceleration of the piston P is zero and its velocity is maximum

d.

acceleration of the piston P is maximum and its velocity is zero

Discuss
Answer: (c).acceleration of the piston P is zero and its velocity is maximum
Q276.
In the below figure, PC is the connecting rod and OC is the crank making an angle ฮธ with the line of stroke PO and rotates with uniform angular velocity at ฯ‰ rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral C Q NO. The acceleration of the piston P with respect to the crankpin C is given by

a.

ฯ‰² x NO

b.

ฯ‰² x CO

c.

ฯ‰² x CN

d.

ฯ‰² x QN

Discuss
Answer: (c).ฯ‰² x CN
Q277.
The velocity of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

a.

ฯ‰R cos ฮธ

b.

ฯ‰(R - r1)cos ฮธ

c.

ฯ‰(R - r1)sin ฮธ

d.

ฯ‰r1 sin ฮธ

Discuss
Answer: (c).ฯ‰(R - r1)sin ฮธ
Q278.
Which of the following property of the instantaneous centre is correct ?

a.

A rigid link rotates instantaneously relative to another link at the instantaneous centre for the configuration of the mechanism considered.

b.

The two rigid links have no linear velocity relative to each other at the instantaneous centre.

c.

The velocity of the instantaneous centre relative to any third rigid link is same whether the instantaneous centre is regarded as a point on the first rigid link or on the second rigid link.

d.

all of the above

Discuss
Answer: (d).all of the above
Q279.
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)

a.

2ฯ€. โˆš(q/I)

b.

2ฯ€ qI

c.

(1/2ฯ€). โˆš(q/I)

d.

1/2ฯ€

Discuss
Answer: (c).(1/2ฯ€). โˆš(q/I)
Q280.
If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be

a.

four times the first one

b.

same as the first one

c.

one fourth of the first one

d.

one and a half times the first one

Discuss
Answer: (c).one fourth of the first one
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