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DIPLOMA ENGINEERING – SEMESTER – III • EXAMINATION – SUMMER 2015
Subject Code: 3331905 Date:18 - 05- 2015
Subject Name: Applied Electrical & Electronics Engineering
Time: 2:30 pm to 5:00 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. What will happen when transformer is connected to DC supply?
2. Draw symbolic representation of DIODE & state its application.
3. Draw connection diagram for measurement of power using wattmeter.
4. Write full name of (1) SCR (2) MCB (3) PMMC (4) ELCB.
5. What is the function of FUSE?
6. State the different types of DC generator.
7. State fleming’s Right hand rule.
8. Write difference between wire & cable.
9. Explain the term FRINGING.
10. State the applications of DIAC & TRIAC.
Q.2 (a) Explain Ohm’s law and write its limitation. 03
OR
(a) Explain the construction of optical fiber. 03
(b) State the advantages of PCB. 03
OR
(b) Explain the comparison between microprocessor & microcontroller. 03
(c) Draw and explain digital multimeter. 04
OR
(c) Explain the working of PNP transistor. 04
(d) Explain the comparison between synchronous motor & induction motor. 04
OR
(d) Write short note on UPS. 04
Q.3 (a) Explain the factors affecting the resistance of the conducting material. 03
OR
(a) State the advantages of three phase system over single phase system. 03
(b) Draw and explain the block diagram of CRO. 03
OR
(b) Explain the working of DC generator. 03
(c) Draw and explain the general construction of cable. 04
OR
(c) Derive an EMF equation of single phase transformer. 04
(d) Explain the necessity of starter. 04
OR
(d) What is an earthing ? write its importance. 04
Q.4 (a) List out any three common faults occurring in single phase induction motor. 03
OR
(a) Write an advantages of any three single phase induction motor. 03
(b) Draw the symbol of PNP & NPN transistor with its pin identification. 04
OR
(b) Difine :- (1) time period (2) instantaneous value (3) frequency (4) cycle. 04
(c) A 11KV/6.6KV,50 HZ Single phase transformer has maximum flux density is 1.21 tesla and No. of turns in primary winding is 5400 then calculate (1) area of core (2) No. of turns in secondary winding (3) transformation ratio (4) turns ratio (5) volt/turn. 07
Q.5 (a) State the comparison between electric & magnetic circuit. 04
(b) Define :- (1) resistance (2) reluctance (3) current (4) magnetic flux. 04
(c) State the advantages and disadvantages of PLC. 03
(d) Explain the method of insulation resistance using Megger. 03
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