Dynamics of Machinery Test Questions

Q.  Which type of earplugs contain silicon rubber and a fixing agent?

a. Semi insert protectors
b. Custom moulded earplugs
c. Pre-fabricated earplugs
d. Canal caps


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  Calculate damped natural frequency, if a spring mass damper system is subjected to periodic disturbing force of 30 N. Damping coefficient is equal to 0.76 times of critical damping coefficient and undamped natural frequency is 5 rad/sec
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MCQs:  Calculate critical speed of a vehicle which moves on a road having sinusoidal profile of wavelength 2.5 m. The mass of the vehicle is 300 kg and natural frequency of its spring suspension system is 8 rad/sec
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MCQs:  Which of the following instruments measure amplitude of a vibrating body?
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MCQs:  Which of the following statements is/are true for elastomers?
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MCQs:  Which of the following methods can be used to control the noise level at source?
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MCQs:  What is the function of frequency analyzer?
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MCQs:  Which instrument integrates sound pressure as a function of time over a period of time?
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MCQs:  What are the adverse effects of noise on the organizations?
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MCQs:  The process of maintaining appropriate noise level without considering economic factors is called as _____
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