Measurement and Instrumentation

101. Which of the following are integrating instruments?

1. Ammeters
2. Voltmeters
3. Wattmeters
4. Ampere-hour and watt-hour meters

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102. Which of the following devices may be used for extending the range of instruments?

1. Shunts
2. Multipliers
3. Current transformers
4. Potential transformers
5. All of the above

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103. Which of the following devices should be used for accurate measurement of low D.C. voltage?

1. Small range moving coil voltmeter
2. D.C. potentiometer
3. Small range thermocouple voltmeter
4. None of the above

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104. Which of the following essential features is possessed by an indicating instrument?

1. Deflecting device
2. Controlling device
3. Damping device
4. All of the above

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105. Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured?

1. Absolute instruments
2. Indicating instruments
3. Recording instruments
4. Integrating instruments

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106. Which of the following is an essential part of a motor meter?

1. An operating torque system
2. A braking device
3. Revolution registering device
4. All of the above

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107. Which of the following is measured by using a vector voltmeter?

1. Amplifier gain and phase shift
2. Filler transfer functions
3. Complex insersion loss
4. All of the above

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108. Which of the following meters are not used on D.C. circuits

1. Mercury motor meters
2. Commutator motor meters
3. Induction meters
4. None of the above

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109. Which of the following properties a damping oil must possess?

1. Must be a good insulator
2. Should be non-evaporating
3. Should not have corrosive action upon the metal of the vane
4. The viscosity of the oil should not change with the temperature
5. All of the above

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