Measurement and Instrumentation Multiple Choice Questions and Answers

81. 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

82. 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

83. 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

84. 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

85. 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

86. 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. All of the above

87. .............instruments are those which measure the total quantity of electricity delivered in a particular time.

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

88. A direct current can be measured by

1. a D.C. potentiometer directly
2. a D.C. potentiometer in conjunction with a standard resistance
3. a D.C. potentiometer in conjunction with a volt ratio box
4. none of the above

89. A dynamometer wattmeter can be used for

1. both D.C. and A.C.
2. D.C. only
3. A.C. only
4. any of the above

90. A moving iron instrument can be used for

1. D.C. only
2. A.C. only
3. both D.C. and A.C.