124) The example of successfully constrained motion is a

motion of an I.C. engine valve

motion of the shaft between a foot-step bearing

piston reciprocating inside an engine cylinder

all of the above

Answer is:

all of the above

Explanation:

When the motion between the elements, forming a pair,is such that the constrained motion is not completed by itself, but by some other means, then the motion is said to be successfully constrained motion.

Theory of Machines MCQ with Answers

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125) The angle which the normal reaction makes with the resultant reaction is called angle of friction.

Agree

Disagree

Answer is:

Agree

126) Which one of the following can completely balance several masses revolving in different planes on a shaft?

A single mass in different planes

Two masses in any two planes

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

Two equal masses in any two planes

Answer is:

Two masses in any two planes

127) When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than

0.25

0.5

Answer is:

2

128) When the nature of contact between the elements of a pair is such that it can turn or revolve about a fixed axis, the pair is known as a rolling pair.

Correct

Incorrect

Answer is:

Incorrect

Theory of Machines MCQ with Answers

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124) The example of successfully constrained motion is a

all of the above

Theory of Machines MCQ with Answers

Related Theory of Machines MCQ with Answers

125) The angle which the normal reaction makes with the resultant reaction is called angle of friction.

Agree

126) Which one of the following can completely balance several masses revolving in different planes on a shaft?

Two masses in any two planes

127) When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than

2

128) When the nature of contact between the elements of a pair is such that it can turn or revolve about a fixed axis, the pair is known as a rolling pair.

Incorrect

Theory of Machines MCQ with Answers