Theory Of Machine MCQ Questions with answers and solutions Page 1

Q. In considering friction of a V-thread, the virtual coefficient of friction (μ1) is given by

(A) μ1 = μsinβ
(B) μ1 = μcosβ
(C) μ1= μ sinβ
(D) μ1= μ cosβ

💬 Discuss

✅ Correct Answer: (D) μ1= μ cosβ

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Q. The lower pairs are _________ pairs.

(A) Self-closed
(B) Force-closed
(C) Friction closed
(D) None of these

💬 Discuss

✅ Correct Answer: (A) Self-closed

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Q. In a coupling rod of a locomotive, each of the four pairs is a ________ pair.

(A) Sliding
(B) Turning
(C) Rolling
(D) Screw

💬 Discuss

✅ Correct Answer: (C) Rolling

Explanation: A coupling rod in a locomotive is a crucial component that connects the driving wheels of the locomotive. It plays a vital role in transmitting motion from the piston to the wheels. The question is asking about the type of pair formed by each connection between the coupling rod and the driving wheel.

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Q. A kinematic chain is known as a mechanism when

(A) None of the links is fixed
(B) One of the links is fixed
(C) Two of the links are fixed
(D) None of these

💬 Discuss

✅ Correct Answer: (B) One of the links is fixed

Explanation: A kinematic chain is a combination of links connected in a specific order, allowing relative motion between them. When one of the links in a kinematic chain is fixed or stationary, it is termed a mechanism. This fixed link provides a frame of reference against which the motions of other links are observed. The fixed link is often referred to as the "ground" or "frame" link, and it serves as a foundation for the movement and analysis of the remaining links in the kinematic chain.

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Q. A pantograph is a mechanism with

(A) Lower pairs
(B) Higher pairs
(C) Rolling pairs
(D) Turning pairs

💬 Discuss

✅ Correct Answer: (A) Lower pairs

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Q. A ball and a socket forms a

(A) Turning pair
(B) Rolling pair
(C) Screw pair
(D) Spherical pair

💬 Discuss

✅ Correct Answer: (D) Spherical pair

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Q. In a gear having involute teeth, the normal to the involute is a tangent to the

(A) Pitch circle
(B) Base circle
(C) Addendum circle
(D) Dedendum circle

💬 Discuss

✅ Correct Answer: (B) Base circle

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Q. A mechanism is an assemblage of

(A) Two links
(B) Three links
(C) Four or more than four links
(D) All of these

💬 Discuss

✅ Correct Answer: (C) Four or more than four links

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Q. Which of the following statement is correct as regard to the difference between a machine and a structure?

(A) The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
(B) The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
(C) A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work
(D) All of the above

💬 Discuss

✅ Correct Answer: (D) All of the above

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Q. In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is

(A) 95 mm
(B) Slightly less than 95 mm
(C) Slightly more than 95 mm
(D) 45 mm

💬 Discuss

✅ Correct Answer: (B) Slightly less than 95 mm

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Theory Of Machine

Theory Of Machine MCQs | Page - 1

Q. In considering friction of a V-thread, the virtual coefficient of friction (μ1) is given by

Q. The lower pairs are _________ pairs.

Q. In a coupling rod of a locomotive, each of the four pairs is a ________ pair.

Q. A kinematic chain is known as a mechanism when

Q. A pantograph is a mechanism with

Q. A ball and a socket forms a

Q. In a gear having involute teeth, the normal to the involute is a tangent to the

Q. A mechanism is an assemblage of

Q. Which of the following statement is correct as regard to the difference between a machine and a structure?

Q. In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is

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