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 2 of 48

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Q11.
For a twin cylinder V-engine, the crank positions for primary reverse cranks and secondary direct cranks are shown in the below figure. The engine is a

a.

30° V-engine

b.

60° V-engine

c.

120° V-engine

d.

150° V-engine

Discuss
Answer: (a).30° V-engine
Q12.
If ฯ‰/ฯ‰n = 2, where co is the frequency of excitation and ฯ‰n is the natural frequency of vibrations, then the transmissibility of vibration will the

a.

0.5

b.

1

c.

1.5

d.

2

Discuss
Answer: (b).1
Q13.
A disturbing mass m1 attached to the rotating shaft may be balanced by a single mass m2 attached in the same plane of rotation as that of m1, such that (where r1 and r2 are the radii of rotation of m1 and m2 respectively)

a.

m1r2 = m2r1

b.

m1r1 = m2r2

c.

m1m2 = r1r2

d.

none of these

Discuss
Answer: (b).m1r1 = m2r2
Q14.
In railway axle boxes, the bearing used is

a.

deep groove ball bearing

b.

double row self-aligning ball bearing

c.

double row spherical roller bearing

d.

cylindrical roller bearing

Discuss
Answer: (c).double row spherical roller bearing
Q15.
The dynamic friction is the friction experienced by a body, when the body

a.

is in motion

b.

is at rest

c.

just begins to slide over the surface of the other body

d.

none of the above

Discuss
Answer: (a).is in motion
Q16.
The steering of a ship means

a.

movement of a complete ship up and down in vertical plane about transverse axis

b.

turning of a complete ship in a curve towards right or left, while it moves forward

c.

rolling of a complete ship side-ways

d.

none of the above

Discuss
Answer: (b).turning of a complete ship in a curve towards right or left, while it moves forward
Q17.
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
Q18.
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
Q19.
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
Q20.
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
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