Q. In considering friction of a V-thread, the virtual coefficient of friction (μ1) is given by
β
Correct Answer: (D)
μ1=
μ
cosβ
Theory Of Machine MCQs | Page - 1
Dear candidates you will find MCQ questions of Theory Of Machine here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. The lower pairs are _________ pairs.
β
Correct Answer: (A)
Self-closed
Q. In a coupling rod of a locomotive, each of the four pairs is a ________ pair.
β
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.
Q. A kinematic chain is known as a mechanism when
β
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.
Q. A pantograph is a mechanism with
β
Correct Answer: (A)
Lower pairs
Q. A ball and a socket forms a
β
Correct Answer: (D)
Spherical pair
Q. In a gear having involute teeth, the normal to the involute is a tangent to the
β
Correct Answer: (B)
Base circle
Q. A mechanism is an assemblage of
β
Correct Answer: (C)
Four or more than four links
Q. Which of the following statement is correct as regard to the difference between a machine and a structure?
β
Correct Answer: (D)
All of the above
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
β
Correct Answer: (B)
Slightly less than 95 mm
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