Practice Test: Question Set - 04
1. The power factor of a single phase load can be calculated if the instruments available are
- (A) One voltmeter and one ammeter
- (B) One voltmeter, one ammeter and one wattmeter
- (C) One voltmeter, one ammeter and one energy meter
- (D) Any of the above
2. In a single phase power factor meter the phase difference between the currents in the two pressure coils is
- (A) Exactly 0°
- (B) Approximately 0°
- (C) Exactly 90°
- (D) Approximately 90°
3. For measurements on high voltage capacitors, the suitable bridge is
- (A) Wien bridge
- (B) Modified De Santy's bridge
- (C) Schering Bridge
- (D) Any of the above
4. To measure a resistance with the help of a potentiometer it is
- (A) Necessary to standardize the potentiometer
- (B) Not necessary to standardize the potentiometer
- (C) Necessary to use a volt ratio box in conjunction
with the potentiometer
- (D) None of the above
5. The operating voltage of a Meggar is about
- (A) 6 V
- (B) 12 V
- (C) 40 V
- (D) 100 V
6. An ohmmeter is a
- (A) Moving iron instrument
- (B) Moving coil instrument
- (C) Dynamometer instrument
- (D) None of the above
7. A dynamometer wattmeter can be used for
- (A) Both D.C. and A.C.
- (B) D.C. only
- (C) A.C. only
- (D) Any of the above
8. The disc of an instrument using eddy current damping should be of
- (A) Conducting and magnetic material
- (B) Non-conducting and magnetic material
- (C) Conducting and nonmagnetic material
- (D) None of the above
9. The use of ________ instruments is merely confined within laboratories as standardizing instruments.
- (A) Absolute
- (B) Indicating
- (C) Recording
- (D) Integrating
10. An instrument transformer is used to extend the range of
- (A) Induction instrument
- (B) Electrostatic instrument
- (C) Moving coil instrument
- (D) Any of the above
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