Haryana State board of Technical education 2011 Basics of Electrical & Electronics Engineering , - Question Paper

No. of printed pages: four 30136/2525
Roll no. ...............

third semester
Civil engineering

Subject: Basics of Electrical & Electronics Engineering
Time: three hours Minimum Marks: 100
Instruction
Solve All parts.
part - A
Note: Attempt any 15 parts. Very short ans ques.. Answers should be of 1-2 lines and every ques. should be attempted in 1-2 minutes. [Each ques. contain two marks]

Q1. 1) Can transformer works on D.C.? Yes or no.
2) describe voltage.
3) In step down transformer the output voltage is less then input voltage. State true/false
4) describe current.
5) describe Power
6) Instrument used for measuring voltage is.................
7) Unit of energy is...........
8) In Diode electric current flows in both directions .true/false?
9) Star delta starter is used in ……. Motor.
10) How can direction of rotation of three phase motor be reversed?
11) What is earthing?
12) Write full form of ELCB?
13) Write full form MCB?
14) Transformer is based on the principle of …….. Induction.
15) describe Electrical energy?
16) An ideal transformer has ………….. Losses.
17) A transistor has …………. Terminal.


part – B
Note: Attempt any 10 parts. Short ans kind ques. to be answered in 3-5 line only .each ques. may be attempted in maximum five minute
[each ques. contain four marks]


Q.2 1) what is the difference ranging from a.c. and D.C. supply?
2) What is the principal of transformer?
3) State use of single phase induction motor?
4) List different accessories and parts of electrical installation.
5) Draw the circuit diagram to measure voltage, current and power in an A.C. circuit.
6) discuss why fuse is used in electrical circuit.
7) discuss plate earthing.
8) List the main component of distribution system.
9) discuss the difference ranging from 3 phase ac and single phase A.C. supply.

10) discuss working of induction motor.
11) elaborate the advantages of h.r.c. fuse over normal fuse?
12) elaborate precautions against electric shock?
13) What is the difference ranging from high and low voltage distribution system
14) Write in details 1 method of starting a three phase induction motor.
15) elaborate the advantages of electrical energy over other forms of energy?

SECTION-C
Note: Long ans kind ques.. Attempt any 3 ques.. every ques. contain 10 marks

1) Describe construction of a transformer. Write various parts of transformers.
2) Explain the methods for treatment of electrics shock.
3) Differentiate ranging from intrinsic and extrinsic semiconductors.
4) Explain characteristics and application of thyristor /SCR.
5) Describe conduit wiring. elaborate its advantage and disadvantage? Where this kind of wiring is is used?

Earning:   Approval pending.