Dynamics of Machinary MCQs with answers Page - 15

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Q. Which instrument is used to record building vibrations or vibrations of huge structures like railway bridges?

  • (A) Stroboscope
  • (B) Accelerometer
  • (C) Vibrometer
  • (D) None of the above

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Q. Vibration measuring instruments are classified on the basis of ____________.

  • (A) contact between the vibrating system and measuring instrument
  • (B) the requirement of power source
  • (C) method of measurements
  • (D) all of the above

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Q. From the following, which one is also known as low-frequency Transducer?

  • (A) Stroboscope
  • (B) Accelerometer
  • (C) Vibrometer
  • (D) None of the above

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Q. From the following, which one is a type of vibration measuring instrument?

  • (A) Mechanical
  • (B) Electrical
  • (C) Magnetic
  • (D) All of the above

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Q. Main sources of noise pollution are

  • (A) Transportation equipment only
  • (B) Heavy machinery only
  • (C) Musical instruments
  • (D) Transportation equipment and heavy machinery

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Q. The sound can travel in air when:

  • (A) Particles of medium travel from one place to another
  • (B) There is no moisture in the atmosphere
  • (C) Disturbance travel from one place to another
  • (D) Both particles as well as disturbance travel from one place to another

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Q. White noise is random noise that has a audible frequency rangefrom

  • (A) 320 to 100 KHz
  • (B) 20 to 20KHtz
  • (C) 120 to 20KHtz
  • (D) 220 to 20KHtz

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Q. Which among the following has a constant power spectral density over a wide frequency range?

  • (A) White noise
  • (B) Black noise
  • (C) Pink noise
  • (D) Blue noise

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Q. Which is correct option for ear protection equipment?

  • (A) Headphone
  • (B) Use of cotton in ears
  • (C) Ear defeders ,Ear plugs
  • (D) All the above

A

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Q. The technique or method to absorb undesirable sounds by soft and porous

  • (A) Acoustic protection
  • (B) Unacoustic protection
  • (C) Audible protection
  • (D) Decibel protection

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