1) Temperature monitoring technique uses which of the following devices to measure temperature of the machining surfaces?
a. Pyrometers
b. Thermocouples
c. Thermometers
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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2) Which of the following statements is true about stroboscope?
a. Stroboscope is non-contact type frequency instrument
b. Stroboscope can measure frequency upto 5 Hz
c. Stroboscope uses electromagnetic radiations to measure frequency
d. All of the above
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Answer
Explanation
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ANSWER: Stroboscope is non-contact type frequency instrument
Explanation:
No explanation is available for this question!
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3) Which type of frequency measuring instrument has multiple reeds of different natural frequency to measure vibrations?
a. Fullarton tachometer
b. Frahm Tachometer
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Frahm Tachometer
Explanation:
No explanation is available for this question!
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4) Which type of instruments do not require separate power source for measuring vibratory response of a vibratory system?
a. Active instruments
b. Passive instruments
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Passive instruments
Explanation:
No explanation is available for this question!
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5) Which of the following instruments measure amplitude of a vibrating body?
a. Vibrometers
b. Seismometer
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Both a. and b.
Explanation:
No explanation is available for this question!
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6) Which of the following conditions is/are to be satisfied by the seismometer for it to be used as velometer?
a. It's natural frequency should be large
b. It's natural frequency should be small
c. It's output signal should be proportional to relative acceleration of the vibrating body
d. None of the above
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Answer
Explanation
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ANSWER: It's natural frequency should be small
Explanation:
No explanation is available for this question!
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7) Which of the following vibrometers have frequency ratio (ω/ωn) << 1?
a. Accelerometers
b. Velometers
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Accelerometers
Explanation:
No explanation is available for this question!
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8) In graph of (Transmissibility vs Frequency Ratio) shown below, the shaded region is called as____
a. Spring controlled region
b. Damping controlled region
c. Mass controlled region
d. None of the above
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Answer
Explanation
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ANSWER: Mass controlled region
Explanation:
No explanation is available for this question!
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9) Which type of monitoring system uses stroboscope to measure speed of the machine?
a. Portable condition monitoring system
b. Basic condition monitoring system
c. Computer based condition monitoring system
d. None of the above
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Answer
Explanation
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ANSWER: Basic condition monitoring system
Explanation:
No explanation is available for this question!
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10) Seismometer can be used to measure acceleration of any instrument only if _____
a. it's natural frequency is high
b. it generates output signal which is proportional to relative acceleration of the vibrating object
c. both a. and b.
d. none of the above
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Answer
Explanation
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ANSWER: both a. and b.
Explanation:
No explanation is available for this question!
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