August
2015
V62/T07041/EE/20150818
Electrical Engineering
Instructions
Marks-80
Time: 3 Hrs
1. All questions are compulsory.
2. “Long Answer type Question (LAQ)” is a supply type
question of 15 marks which required a typical answer of about
60-80 lines in bout 32-40 minutes.
3. “Sort Answer type Question (SAQ)” is a supply type question
of 5 marks which required a typical answer of about 15-20 lines
in bout 08-10 minutes.
4. Figures to the right indicate marks allotted to the questions.
5. Assume suitable data if necessary
6. Use a nonprogrammable type of scientific calculator is
allowed
Marks
SECTION-A
Q.1 A series combination of a resistance of 100Ὠ and a capacitance of
50 microfarad is connected to a 230V, 50Hz supply. Determine:
i) Current in the circuit.
ii) Voltage across the resistance and capacitance.
iii) Power factor of the circuit.
iv) Power consumed. Draw a phase’s diagram.
15
OR
Q.1 Differentiate between AC and DC quantities. Show its significance.
15
Q.2 List the advantage and disadvantages of three-phase transformers.
Comment briefly on their types and constructional features.
15
OR
Q.2 Show diagrammatically different types of D.C. Motors and give
their industrial uses.
15
Q.3 What is an alternating current? Compare it with a direct current.
5
Q.4 Define the electronic type single energy meters
5
SECTION-B
Q.5 What is stepper motor? Explain the construction and principle of
working of
i) Variable Reluctance stepper motor
ii) Permanent magnet stepper motor.
15
OR
Q.5 Compare different types of single-phase induction motors and state
their applications.
15
Q.6 Define the following terms:
i) Centrifugal pumps
ii) Submersible pumps.
iii) Deep well turbine pumps
15
OR
Q.6 Describe the construction and operation of the coreless-induction
furnace, State its applications.
15
Q.7 What is rotating magnetic field? How it differ from an alternating
field?
5
Q.8 What are the different methods which is used for 3 phase induction
motor.
5
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