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1) Which of the following statements is/are true? 1. Magnification factor is minimum at resonance 2. The maximum value of amplification factor increases as damping factor decreases 3. The maximum value of amplification factor increases as damping factor increases 4. Magnification factor is maximum at resonance a. Statement 1 and statement 2 b. Statements 1,2 and 3 c. Statement 2 and statement 4 d. All the above statements are true
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2) What is meant by geometric modeling? a. Representation of an object with graphical information b. Representation of an object with non-graphical information c. Both a. and b. d. None of the above
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3) Simulation is a process which _________ a. involves formation of a prototype b. explores behavior of a model by varying input variables c. develops geometry of an object d. all of the above
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4) Which of the following statements is/are true? a. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction b. Shaft vibrates with maximum frequency when rotors rotate in same direction c. Zero node behavior is observed in rotors rotating in opposite direction d. All of the above
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5) 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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6) 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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7) 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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8) Which of the following methods can be used to reduce excitation level at the source? a. Lubrication of joints b. Balancing inertia forces c. Both a. and b. d. None of the above
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9) Which of the following is a type of untuned vibration absorber? a. Houdaille damper b. Torsional vibration absorber c. Centrifugal pendulum absorber d. All of the above
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10) Which basic document describes general requirements for measurement and evaluation of machine vibrations using shaft measurements? a. ISO – 10816-1 b. ISO – 7919-1 c. Both a. and b. d. None of the above
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