GATE ME 2021 || Theory of machines Quiz 8

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Question 1

What is vibration isolator?

• AIt is an elastic mounting system that realized by incorporating
• BIt serves as strategy which lowers noise and vibrations thereby interrupting propagation path among source and receiver.
• CIt is a vibration generating machinery and processes showing total noise and vibration.
• DAll of above

Question 2

For an under damped system, if the ratio of two successive peak is 10, then the minimum damping ratio (ζ) will be

• A0.689
• B0.591
• C0.344
• DData insufficient

Question 3

For a system under simple harmonic motion, the acceleration is written as
where ω= Natural Frequency of vibration; x= displacement; ẋ=velocity

• A- ω ². x
• Bω. x
• C- ω ². ẋ
• Dω. ẋ

Question 4

The vibration analysis of a physical system may be summarized by

• AMathematical Modeling of a Physical System
• BFormulation of Governing Equations
• CMathematical Solution of the Governing Equations
• DAll of the above

Question 5

In a spring mass damper system (k=20N/m; m=2kg), The value of damped frequency (rad/sec) if the damper offers a resistance of 2N force when it vibrates with a constant velocity of 40cm/sec is:

• A0.968 rad/sec
• B1.908 rad/sec
• C29.38 rad/sec
• D2.908 rad/sec

Question 6

For a vibration system, equation of motion is given as
The value of frequency of damped vibration is __________ (in rad/s).

• A1.25
• B1.02
• C1.11
• D1.41

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