This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “DC Power Supplies”.
1. 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
View Answer
Explanation: Source of supply will be a battery, dry cell or full wave rectifier etc.
2. Which of the application’s filters used for?
a) Reducing ripples
b) Increasing ripples
c) Increasing phase change
d) Increasing amplitude
View Answer
Explanation: Ripples are ac components and filters are used for eliminating ac components from a signal.
3. 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
View Answer
Explanation: Load regulation is the process of fractional change of output voltage when load current is increased from zero to maximum value.
4. Which of the following generate output voltage much closer to true value?
a) True generator
b) Precision generator
c) Output generator
d) Accurate generator
View Answer
Explanation: Precision generators are one which generates output voltage much closer to the true value.
5. Why zener diodes are provided in dc supply?
a) For forward conduction
b) For reverse conduction
c) For reference voltage
d) For increasing amplitude
View Answer
Explanation: Zener diodes in dc power supplies are used for providing a reference voltage used for comparison.
6. Stability of output voltage is entirely depended on ______________
a) Stability of transformer
b) Stability of zener diode
c) Quality of wires
d) Capacitor values
View Answer
Explanation: Stability of zener diodes used is an important factor in determining the stability of output voltage in dc power supply.
7. For excellent stability, the zener diode is kept in temperature controlled casket.
a) True
b) False
View Answer
Explanation: Zener diode is kept on temperature controlled casket due to its low temperature coefficient which may lead to less stability.
8. For instrumentation system, precision variable voltage-reference system is necessary.
a) True
b) False
View Answer
Explanation: Precision variable voltage reference system is used for comparing voltage with a reference voltage and can be used in the instrumentation system.
9. Which of the following can be used as a comparator?
a) Zener diode
b) Diode
c) Operational amplifier
d) All of the mentioned
View Answer
Explanation: Operational amplifier can be used as a comparator circuit.
10. 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
View Answer
Explanation: Standard values of zener voltages are 5.1V, 5.6V, 6.2V and 9.1V etc.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
To practice all areas of Instrumentation Transducers, here is complete set of 1000+ Multiple Choice Questions and Answers.
- Check Instrumentation Transducers Books
- Practice Instrumentation Engineering MCQs
- Apply for Instrumentation Engineering Internship
- Check Instrumentation Engineering Books
