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 1 of 48

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Q1.
Two pulleys of radii r1 and r2 and at distance x apart are connected by means of a cross belt drive. The length of the belt is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q2.
A shaft of mass (mc) and stiffness (s) is fixed at one end and carries a mass (m) at the other end. The natural frequency of its longitudinal vibration is equal to

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q3.
The ratio of velocities of the shafts connected by Hooke's joint is given by (where N and N1 = Speed of driving and driven shafts (in r.p.m.) respectively, ฮธ = Angle through which the arms of the cross turn, and ฮฑ = Angle of inclination between the two shafts)

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q4.
In under damped vibrating system, if x1 and x2 are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q5.
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
Q6.
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
Q7.
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
Q8.
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
Q9.
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
Q10.
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
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