Summer 2016 Applied Electrical and Electronic Engineering Question Paper

**********

GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – III • EXAMINATION – SUMMER 16
Subject Code: 3331905 Date: 27.05.2016
Subject Name: Applied Electrical And Electronic Engineering
Time: 02:30 PM TO 05:00 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.

***********

Q.1 Answer any seven out of ten. 14

1. What is difference between work and power?

2. Explain DC system and AC System.

3. State the limitations of Ohm’s Law.

4. Write full name of (1) BJT (2) ELCB (3) PLC (4)IGBT.

5. State the different types of DC generator.

6. Draw symbolic representation of DIODE and state its application.

7. What is the function of FUSE?

8. Write the difference between Microprocessor and Microcontroller?

9. State the advantages of earthing?

10. What is the function of RECTIFIER?

Q.2 (a) State the advantages of three phase ac system over single phase ac system. 03

OR

(a) Explain the Hysteresis Loop. 03

(b) Explain factors affecting resistance of material. 03

OR

(b) An iron ring of 225cm mean diameter is wound with a coil of 550 turns carrying a current of 4A.Calculate the flux density in the ring if the relative permeability of iron is 1000. 03

(c) Define following terms:
(i) Instantaneous Value (ii) Frequency (iii) Form Factor (iv) RMS Value. 04

OR

(c) List out the common faults occurring in three phase and single phase induction motor. 04

(d) Explain the comparison between conventional and Auto transformer. 04

OR

(d) Explain the comparison between synchronous motor and induction motor. 04

Q.3 (a) Enlist types of wires and explain any one in brief. 03

OR

(a) Draw the net sketch of underground cable and explain its all layers in brief. 03

(b) What is the function of Wattmeter and Energy meter? Draw circuit connection diagram for wattmeter and energy meter. 03

OR

(b) Explain V- I characteristics of P-N junction diode. 03

(c) Compare electric and magnetic circuit. 04

OR

(c) Explain measurement of AC voltage and frequency using C.R.O. 04

(d) Explain the necessity of starter for DC motor. 04

OR

(d) Compare squirrel cage and slip ring induction motor. 04

Q.4 (a) Explain two transistor model of Silicon Controlled Rectifier. 03

OR

(a) Compare cylindrical and salient/projected pole type rotor. 03

(b) Explain the working of PNP transistor. 04

OR

(b) Explain the construction of Opto coupler and write its application. 04

(c) Derive the relationship between phase value and line value of voltage and current
for three phase Star connection. 07

Q.5 (a) Derive the E.M.F. equation of transformer. 04

(b) Explain the method of insulation resistance using Megger. 04

(c) Draw and explain block diagram of UPS. 03

(d) List out different types of Resistor,Inductor and Capacitor. 03

************