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.

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Theory of machines MCQs | Page 17 of 48

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Q161.
The displacement of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r1 = Minimum radius of the cam, and ฮธ = Angle turned through by the cam)

a.

R(1 - cos ฮธ)

b.

(R - r1)(1 - cos ฮธ)

c.

R(1 - sin ฮธ)

d.

(R - r1)(1 - sin ฮธ)

Discuss
Answer: (b).(R - r1)(1 - cos ฮธ)
Q162.
The contact ratio is the ratio of

a.

length of pair of contact to the circular pitch

b.

length of arc of contact to the circular pitch

c.

length of arc of approach to the circular pitch

d.

length of arc of recess to the circular pitch

Discuss
Answer: (b).length of arc of contact to the circular pitch
Q163.
An exact straight line motion mechanism is a

a.

Scott-Russell's mechanism

b.

Hart's mechanism

c.

Peaucellier's mechanism

d.

all of these

Discuss
Answer: (d).all of these
Q164.
A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is ฮฑ. The effort applied parallel to the plane is given by (where ฮผ = tan ฯ† = Coefficient of friction between the plane and the body)

a.

P = W tan ฮฑ

b.

P = W tan (ฮฑ + ฯ†)

c.

P = W (sin ฮฑ + ฮผ cos ฮฑ)

d.

P = W (cos ฮฑ + ฮผ sin ฮฑ)

Discuss
Answer: (c).P = W (sin ฮฑ + ฮผ cos ฮฑ)
Q165.
In vibration isolation system, if ฯ‰/ฯ‰n > 2, then for all values of damping factor, the trans-missibility (i.e. the ratio of the force transmitted to the force applied) will be less than unity.

a.

True

b.

False

c.

Can't say

d.

None of these

Discuss
Answer: (a).True
Q166.
The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by

a.

ฯ‰²(r1 - r2)(1 - cos2ฮธ)

b.

ฯ‰²(r1 + r2)(1 + cos2ฮธ)

c.

ฯ‰²(r1 + r2)

d.

ฯ‰²(r1 - r2)(1 - sin² ฮธ)

Discuss
Answer: (c).ฯ‰²(r1 + r2)
Q167.
In a four bar chain or quadric cycle chain

a.

each of the four pairs is a turning pair

b.

one is a turning pair and three are sliding pairs

c.

two are turning pairs and two are sliding pairs

d.

three are turning pairs and one is a sliding pair

Discuss
Answer: (a).each of the four pairs is a turning pair
Q168.
When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be

a.

ฯ‰² r {(n + 1)/n}

b.

ฯ‰² r {(n - 1)/n}

c.

ฯ‰² r {n/(n + 1)}

d.

ฯ‰² r {n/(n - 1)}

Discuss
Answer: (b).ฯ‰² r {(n - 1)/n}
Q169.
The example of successfully constrained motion is a

a.

motion of an I.C. engine valve

b.

motion of the shaft between a foot-step bearing

c.

piston reciprocating inside an engine cylinder

d.

all of the above

Discuss
Answer: (d).all of the above
Q170.
Which one of the following can completely balance several masses revolving in different planes on a shaft?

a.

A single mass in different planes

b.

Two masses in any two planes

c.

A single mass in one of the planes of the revolving masses

d.

Two equal masses in any two planes

Discuss
Answer: (b).Two masses in any two planes
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