Winter 2013 Applied Electrical and Electronics Engineering Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
Diploma Engineering - SEMESTER–III • EXAMINATION – WINTER 2013
Subject Code: 3331905 Date: 06-12-2013
Subject Name: Applied Electrical & Electronics Engineering
Time: 02:30 pm - 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. English version is considered to be Authentic.

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Q.1 (a) Define following terms (any seven)
1.RMS value 2.Reluctance 3.Permeability 4.Magnetic Flux 5.EMF 6.MMF
7.Average Value 8.Frequency. 07

(b) Explain construction of DC generator and classify it. 07

Q.2 (a) Draw and explain Hystresis loop and its importance. 07

(b) Name the types of wires and explain any four with diagram. 07

OR

(b) Draw the block diagram of CRO and explain its working. 07

Q.3 (a) Explain star and delta connection of three phase supply. 07

(b) Explain moving iron repulsion type ammeter with diagram. 07

OR

Q.3 (a) Explain Squirrel cage induction motor with its working. 07

(b) Draw and explain four diode full wave bridge rectifier. 07

Q.4 (a) (1) Why single phase motor is not self starting? 03
(2) How single phase induction motor can be started by split phasing? 04

(b) Explain Ohm’s law,and how alternating EMF is generated. 07

OR

Q. 4 (a) Draw and explain ELCB in detail. 07

(b) State the principle of transformer and Explain Autotransformer in detail. 07

Q.5 (a) Explain both N-type and P-type semiconductor in detail. 07

(b) Explain stages of PCB manufacturing Process. 07

OR

Q.5 (a) Draw and explain block diagram of PLC and state its Advantages,Disadvantages
and Applications. 07

(b) Classify capacitors and Expalain Mica capacitor in detail. 07

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Summer 2014 Applied Electrical and Electronics Engineering Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
Diploma Engineering - SEMESTER–III • EXAMINATION – SUMMER • 2014
Subject Code: 3331905 Date: 24-06-2014
Subject Name: Applied Electrical and Electronics Engineering
Time: 10:30 am - 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. English version is considered to be Authentic.

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Q.1 (a) Explain the construction and working of Miniature circuit breaker. 06

(b) Explain: Power factor, Phase difference, Permeance, Potential difference. 08

Q.2 (a) Compare Series and Parallel circuit. 07

(b) What is PLC? Draw and explain its block diagram. 07

OR

(b) Differentiate between core and shell type of transformer. 07

Q.3 (a) Explain the construction and working principle of single phase transformer. 07

(b) Draw and explain the block diagram of CRO. 07

OR

Q.3 (a) What are the types of single phase induction motor?Explain the working of
capacitor start –induction run type induction motor. 07

(b) Explain the construction of underground cable. 07

Q.4 (a) Derive the relationship between phase value and line value of voltage and
current for three phase Star connection. 07

(b) Explain the working of NPN transistor. 07

OR

Q. 4 (a) Explain the working of variable reluctance type stepper motor. 07

(b) Why fuses are used? Discuss their types. 07

Q.5 (a) What are the different types of fixed inductors 07

(b) Give the connection diagrams of different types of self-excited DC generator. 07

OR

Q.5 (a) State the advantages of PCB. 07

(b) Explain the functioning of clip on meter. 07

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Winter 2014 Applied Electrical and Electronic Engineering Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
Diploma Engineering - SEMESTER–III • EXAMINATION – WINTER • 2014
Subject Code: 3331905 Date: 05-12-2014
Subject Name: Applied Electrical and Electronic Engineering
Time: 10:30 am - 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. English version is considered to be Authentic.

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Q.1 Answer any seven out of ten. 14

1. What is difference between work & power?

2. What is single pole two way switch?

3. Give two advantages of autotransformer.

4. What is the function of earthing?

5. What is voltage regulation?

6. What is the function of commutator in DC generator?

7. Give limitations of ohms law.

8. What is PVC wire?

9. Give four conditions for ideal transformer.

10. What is rectifier efficiency?

Q.2 (a) Give construction of MCB & its working during fault condition. 03

OR

(a) Draw & explain the block diagram of optical fiber telecommunication. 03

(b) Explain the working of shaded pole single phase induction motor. 03

OR

(b) Give the construction of stator and slip ring type rotor of three phase induction motor. 03

(c) Explain the factors affecting the resistance of the conducting material. 04

OR

(c) Prove that =0.707 . 04

(d) Draw & explain the connection diagram of wattmeter. 04

OR

(d) Draw & explain the connection diagram of energy meter. 04

Q.3 (a) Draw & explain block diagram of UPS. 03

OR

(a) Give construction & working of Diac. 03

(b) Compare core & shell type of transformer. 03

OR

(b) Explain the construction of drag cup type AC servo motor. 03

© Compare cylindrical & projected pole type rotor. 04

OR

© Explain the working principal of DC motor. 04

(d) Prove = for star connection. 04

OR

(d) Give advantages of three phase system over single phase system. 04

Q.4 (a) How earth resistance is measured by voltmeter –ammeter method? 03

OR

(a) Give construction of optical fibre. 03

(b) Draw & explain the block diagram of microcontroller. 04

OR

(b) Explain the working of NPN transistor. 04

© Explain the different types of cables. 07

Q.5 (a) Explain construction of synchronous motor. 04

(b) Explain unshielded & shielded type of twisted pair cables. 04

© Why optocouplers are used? 03

(d) Give construction & working of full wave rectifier. 03

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Summer 2015 Applied Electrical and Electronic Engineering Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
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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Winter 2015 Applied Electrical and Electronic Engineering Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER –III EXAMINATION – WINTER 2015
Subject Code: 3331905 Date: 11/12 /2015
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. Draw the energy conversion diagram of thermal power station.

2. State difference between Direct Current and Alternating Current.

3. Define the Cork screw rule.

4. Define the Hysteresis loop.

5. State difference between EMF and Potential difference.

6. State only name of wire.

7. State the function of pole.

8. State the application of DC generator.

9. State the advantages of autotransformer.

10. State the function of rectifier.

Q.2 (a) How alternative EMF generated? Explain. 03

OR

(a) Explain the Ohm’s law. 03

(b) Compare series and parallel circuit. 03

OR

(b) Explain the underground cables with figure. 03

(c) State the types of fuse. 04

OR

(c) Explain the moving iron repulsion type ammeter. 04

(d) Explain the application of DC Motor. 04

OR

(d) Explain the slip ring type induction motor.04

Q.3 (a) Explain the capacitor start induction run type motor. 03

OR

(a) State advantages and dis advantages of AC Servomotor. 03

(b) State difference between openloop control system and closeloop control system. 03

OR

(b) Explain the need of trouble shooting chart and its advantages. 03

(c) Explain the working principal of transformer. 04

OR

(c) State difference between core type and sheel type transformer. 04

(d) Explain the application of transformer. 04

OR

(d) Explain the half wave rectifier with figure. 04

Q.4 (a) Draw and explain block diagram of regulated power supply. 03

OR

(a) Explain the revirable fuse. 03

(b) State cause of the electrical accident. 04

OR

(b) Explain the pipe earthling. 04

(c) Explain the classification of resistors. 07

Q.5 (a) Write short note on energy bends. 04

(b) Explain the P-type semiconductor. 04

(c) State the application of transistor. 03

(d) Write short note on diac.03

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Summer 2016 Applied Electrical and Electronic Engineering Question Paper

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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.

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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

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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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