PEE-392C
End Semester Examination
5th
April 2022
Diploma in Electrical Engg.

Instructions
1. Please keep your audio/video turned ON during
entire duration of the examination.
2. Adjust your phone/PC so that examiner can see
you writing the answers.
3. Write the answers on a plain paper with your
name and Roll No. on top of it.
4. Show your answer sheet on screen/read your
answers when asked to do so.
PEE-392C Final Exam 0
5-4-22

Questions (A)
1. Define power factor. What is the value of PF of a
circuit at resonance?
2. Give the formula for electrical energy with commercial
unit.
3. Give the formula for Energy meter Percentage error.
The graph of percentage error v/s load current is a
straight line, True or False?
4. How do you calculate rated secondary current of a
single phase transformer?
5. Write briefly salient parts of an alternator and their
functions.
1
5-4-22 PEE-392C Final Exam
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Questions (B)
1. Give two different formulae for power factor.
2. What is the commercial unit of Electrical Energy?
How is it related to SI unit?
3. What is a transformer? What is the function of an
autotransformer?
4. In an electric circuit, ammeter is connected in
_______ with the load.
5. Name the various coils of a wattmeter.
2
5-4-22 PEE-392C Final Exam
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Questions (C)
1. Find the value of power factor of a circuit with
R = 3 Ω, XL
= 4 Ω. Is PF leading or lagging?
2. What is the meaning of creeping of energy meter?
3. Write the transformation ratio equation in terms of
primary and secondary currents for a 1-Ph T/F?
4. In an electric circuit, voltmeter is connected in _______
with the load.
5. Draw the approx. curve between load current and
terminal voltage at constant excitation for a single
phase alternator.
3
5-4-22 PEE-392C Final Exam
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Questions (D)
1. Find the value of power factor of a circuit with
R = 3 Ω, Xc
= 4 Ω. Is PF leading or lagging?
2. What is the commercial unit of Electrical Energy?
How is it related to SI unit?
3. Name the various tests to determine the
equivalent circuit parameters of a transformer.
4. In an electric circuit, voltmeter is connected in
_______ with the load.
5. Name the various coils of a wattmeter.
4
5-4-22 PEE-392C Final Exam
Send image of your answer sheet by WhatsApp latest by 10:20 AM