Winter 2016 Applied Electrical and Electronic Engineering Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – III • EXAMINATION – WINTER- 2016
Subject Code: 3331905 Date: 30-11-2016
Subject Name: Applied Electrical and Electronic Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.

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Q.1 Answer any seven out of ten. 14

1. Define the term: (i) Resistance (ii) Power Factor

2. What are the functions of rectifier and UPS?

3. Write full name of (i) PCB (ii) IGBT (iii) CRO (iv) M.M.F.

4. State different applications of transformer.

5. What are the functions of MCB and ELCB?

6. Draw symbol of inductor and define inductance.

7. Which instruments can measure AC current in electric circuit?

8. What is the function of pole and pole shoe in DC machine?

9. Explain the importance of earthing.

10. Explain the importance of hysteresis loop.

Q.2 (a) Compare Electromotive force with potential difference. 03

OR

(a) Explain the factors affecting the resistance of conducting material. 03

(b) Draw construction diagram of clamp on meter and explain its working. 03

OR

(b) Draw voltage and current waveforms for lagging, leading and unity power factor. 03

(c) Define the following terms:
(i) Time Period (ii) Form factor (iii) Frequency (iv) Electric Current 04

OR

(c) Describe various types of fuses. 04

(d) Define the following terms:
(i) permeability, (ii) reluctance (iii) magnetic flux (iv) magnetic field strength 04

OR

(d) State the names of the tools used for wiring and explain function of any three. 04

Q.3 (a) Explain classification of transformer 03

OR

(a) Explain working principle of transformer 03

(b) Describe the probable causes if three phase squirrel cage induction motor fails to start. 03

OR

(b) Compare squirrel cage induction motor with slip ring induction motor 03

(c) Explain construction and working of permanent magnet type stepper motor. 04

OR

(c) State the names of the various parts of dc machine and explain function of any three. 04

(d) Explain the necessity of starter. 04

OR

(d) Derive the relation of line voltage and phase voltage in 3- phase star connection. 04

Q.4 (a) Draw & explain the connection diagram of single phase energy meter 03

OR

(a) Describe advantages of three phase system over single phase system 03

(b) Draw the circuit diagram of full wave bridge rectifier and explain its working. 04

OR

(b) State the different methods of earthing and explain any one. 04

(c) Describe the different types of wires. 07

Q.5 (a) Draw and explain block diagram of Programmable logic controller (PLC) 04

(b) Write a short note on Silicon Controlled Rectifier (SCR). 04

(c) State the advantages of PCB 03

(d) Explain Ohm’s law and write its limitation. 03

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