August
T05/T24/TES034/TML034/EE/20150825
2015
Electric Machines
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 Explain single phase load? Explain delta-wye connection with
neutral.
15
OR
Q.1 Explain the following terms
1. Isolated transformer.
2. Autotransformers.
15
Q.2 Explain briefly DC generator magnetic effects of electric current.
15
OR
Q.2 Explain the motor function and transfer equations of DC motor.
15
Q.3 Write a short note on delta-wye connection with neutral.
5
Q.4 What are the advantages of three-phase transformer?
5
SECTION-B
Q.5 Explain the in brief Selwyn motor.
15
OR
Q.5 Explain the working or rotor in a three phase alternators a broad
level.
15
Q.6 Explain the construction and working a shaded pole induction
motor.
OR
15
Q.6 What is meant by a stepper motor? Explain its advantage
15
Q.7 Give the difference between single phase and three phase
alternators
5
Q.8 Give advantage and application of three phase motors.
5
Computer Generated Random Question Paper dated: 16-07-2015 15:27:53