Quiznetik
Electronic Circuits 1 | Set 3
1. HVDC transmission has as compared to HVAC transmission.
A. smaller transformer size
B. smaller conductor size
C. higher corona loss
D. smaller power transfer capabilities
Correct : B. smaller conductor size
2. The negative polarity is used in the monopolar link because it
A. uses less conductor size
B. is safer
C. produces less radio interference
D. has less resistance
Correct : C. produces less radio interference
3. Which of the following can be a source of supply in dc power supplies?
A. battery
B. dry cell
C. full wave rectifier
D. all of the mentioned
Correct : D. all of the mentioned
4. Which of the application’s filters used for?
A. reducing ripples
B. increasing ripples
C. increasing phase change
D. increasing amplitude
Correct : A. reducing ripples
5. Which of the following represent a change of output voltage when load current is increased?
A. line regulation
B. load regulation
C. current regulation
D. voltage regulation
Correct : B. load regulation
6. Which of the following generate output voltage much closer to true value?
A. true generator
B. precision generator
C. output generator
D. accurate generator
Correct : B. precision generator
7. Why zener diodes are provided in dc supply?
A. for forward conduction
B. for reverse conduction
C. for reference voltage
D. for increasing amplitude
Correct : C. for reference voltage
8. Stability of output voltage is entirely depended on
A. stability of transformer
B. stability of zener diode
C. quality of wires
D. capacitor values
Correct : B. stability of zener diode
9. For excellent stability, the zener diode is kept in temperature controlled casket.
A. true
B. false
Correct : A. true
10. For instrumentation system, precision variable voltage-reference system is necessary.
A. true
B. false
Correct : A. true
11. Which of the following can be used as a comparator?
A. zener diode
B. diode
C. operational amplifier
D. all of the mentioned
Correct : C. operational amplifier
12. Which of the following are not the standard value of Zener diodes?
A. 5.1 v
B. 5.6 v
C. 5.8v
D. 6.2v
Correct : C. 5.8v