CIT 352

PC System and Peripheral Repair

Chapter 3 : Troubleshooting and Repair of Power Supply

DAE Computer Information Technology | Third Year

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Chapter 3 (Troubleshooting and Repair of Power Supply) - MCQs

Chapter:03 (Troubleshooting and Repair of Power Supply)

Question 1:

Regulated power supplies are used in __________

Mobile chargers Measurement devices Computers All of the above

Question 2:

The voltage regulator output impedance is _______

Very small High Very high None of the above

Question 3:

The Zener current is maximum when the load current is ___________

Zero Infinity One None of the above

Question 4:

The Zener diode made of _______

Silver Silicon Copper None of the above

Question 5:

The regulated DC power supply also called ________

Linear power supply Non-linear power supply Both a and b None of the above

Question 6:

Rectification can be done by using ______

Transformers Bridge rectifiers Conductors None of the above

Question 7:

The output of the rectification is ______

Unidirectional Bidirectional Multidirectional None of the above

Question 8:

The circuits are ________ in switch-mode power supply

Simple Complex Moderate None of the above

Question 9:

In switch-mode power supply the regulation of voltage is done by controlling _________

Duty cycle Voltage range Both a and b None of the above

Question 10:

The noise and interference in switch-mode power supply is _______

Very less Less More None of the above

Question 11:

The source of supply is _______ in DC power supplies

Full wave rectifier Battery Delay All of the above

Question 12:

A Zener diode utilises ………… characteristic for voltage regulation

Forward Reverse Both forward and reverse None of the above

Question 13:

Another name for Zener diode is ………… diode

Breakdown Voltage Power Current

Question 14:

Which of the following can be a source of supply in dc power supplies?

Battery Dry cell Full wave rectifier All of the mentioned

Question 15:

Which of the following might not be needed in a power supply?

The transformer The filter The rectifier All of the above are generally needed

Question 16:

In. a supply designed to provide high power at low voltage, the best rectifier design would probably be:

Half-wave Full-wave, center-tap Bridge Voltage multiplier

Question 17:

The part of a power supply immediately preceding the regulator is:

The transformer The rectifier The filter The ac input

Question 18:

Transient suppression minimizes the chance of:

Diode failure Transformer failure Filter capacitor failure Poor voltage regulation

Question 19:

If a half-wave rectifier is used with 117-V rms ac (house mains), the average dc output voltage is about:

52.7 V 117 V 105 V 328 V

Question 20:

The output of a rectifier is:

60-Hz ac Pulsating dc Smooth dc 120-Hz ac

NOTE
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INSTRUCTOR
MUHAMMAD BIN JAMEEL
BSC ENGG. CIVIL

PBTE DAE CIT-352 PC System and Peripheral Repair | Chapter 3 : Troubleshooting and Repair of Power Supply | MCQs