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B.E.E.E important 14 marks
Unit-1
1. Construction and care and maintenance of Lead Acid battery
2.On line and off line ups and maintenance of ups
3.ELCB and MCB CIRCUIT BREAKER
4.methods of charging
Unit-2
1.Construction, working and types of transformer
2.Stepper motor
3. Auto transformer
4. AC and DC servo motor
Unit-3
1.CB , CC and CE configuration
2. PN junction.diode
3.Half wave and full wave rectifier
4. LDR and PIN Diode
Unit-4
1.Kmap
2. Universal NAND or NOR gate
3. Multiplex, demultiplexer and decoder
4.Parity generator and number sums
Unit-5
1.Jkms flip flop
2.D and T flip.flop
3. Serial in serial out register
4. 4 bit synchronous counter
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BASIC OF ELECTRICAL AND ELECTRONICS ENGINEERING
3 MARKS QUESTIONS
UNIT-I
1. State the difference between AC and DC
2. Define cycle
3. Define RMS value
4. What is meant by 3 phase
5. State any two advantages of three phase over single phase
6. Define peak factor
7. State the needs for UPS
8. What is meant by on line UPS
9. Define frequency in AC quantity
10. Define primary cell and secondary cell
UNIT –II
1. What is transformer
2. Write the expression for emf equation of transformer
3. How are transformer classified based on the construction
4. State the different types of servo motor
5. Define voltage ratio of a transformer
6. What is effiency of transformer
7. Define stepper motor
8. State any two application of stepper motor
9. What is servo motor
10. State any two application of servo motor
11. What is meant by earthing and its types
12. State the need for fuse ? function for fuse?
UNIT –III
1. Define diode and draw the symbol of diode
2. State the application of diode
3. Define zener breakdown
4. Define avalanche breakdown
5. State the application of zener diode
6. Define rectifier and its types
7. Define ripple factor
8. Define transistor and its types
9. Define peak inverse voltage
10. Draw the symbol of LED and LDR
11. State the application of LED
12. State the application of LDR
UNIT –IV
1. Define ASCII code and BCD code
2. Draw the symbols of NOR and NAND gates
3. Define demorgans theorems
4. What is the use karnaugh map
5. Define redundant
6. Define multiplexer and demultiflexer
7. Define encoder
8. Define decoder
9. Convert the decimal number 926 to its equivalent binary ,octal and hexadecimal
10. Explain the uses of parity bit
11. Explain various types of laws used in Boolean algebra
12. Explain half adder
13. Explain half subtractor
14. Explain full adder and draw its truth table
15. Explain full subtractor and draw its truth table
Unit –V
1. Define flip flop
2. Define SR flip flop
3. Define JK Flip flop
4. Define D flip flop
5. Define T flipflop
6. Define synchronous counter
7. Define asynchronous counter
8. Compare synchronous counter and asynchronous counter
9. Explain toggling in flip flop
10. Explain the need for a master slave flip flop
11. Define shift register and its types
12. Define master salve flip flop
Part –B (14 Marks Questions)
UNIT –I
1. Explain the constructional details of lead acid battery
2. Briefly explain the care and maintenance of lead acid battery
3. Explain with block diagram the working of ON-Line UPS
4. Explain with block diagram the working of OFF-Line UPS
5. Explain the maintenance of UPS and specification and ratings of UPS
6. Explain in detail about the different method of charging of batteries
UNIT-II
1. (i) Explain the working principle of transformer
(ii) explain the construction of transformer
2. Explain the construction and working of stepper motor and write the applications
3. What are factors to be considered for selecting a motor for a particular application
4. Explain the operation of DC servo motor
5. Explain the operation of AC servo motor
6. What is the need of earthing? List the types of earthing? Explain it?
UNIT-III
1. With the diagram explain forward biasing and reverse biasing of PN Junction diode
2. Explain the principle of operation of zener diode
3. Explain the operation of full wave rectifier with diagram
4. Explain the operation of half wave rectifier with diagram
5. Explain the operation of Bridge rectifier with diagram
6. (i) Explain the principle of operation of LED
(ii) Explain the principle of operation of LDR
(iii) with neat diagram , explain transistor as a switch
7. (i) Explain the working principle of NPN transistor
(ii) Explain the working principle of PNP transistor
8. Explain in detail about
(i) CE configuration
(ii) CB Configuration
(iii) CC configuration
UNIT – IV
1. Construct AND and OR logic gates by using NAND gates
2. Construct EXOR logic gate by using only NOR gates
3. With the logic diagram explain half adder and full subtractor
4. With the logic diagram explain full adder and half subtractor
5. With the logic diagram explain encoder and decoder
6. State and prove De-Morgan’s theorem (7 Marks)
UNIT-V
1. Draw the logic diagram of JKMS flip flop and explain its operation
2. Draw the logic diagram of JK flip flop and explain its operation
3. Draw the logic diagram of J flip flop and explain its operation
4. Draw the logic diagram of D flip flop and explain its operation
5. Explain the operation of a 4 bit ripple up counter with logic diagram , wave forms and
truth table
6. With the logic diagram explain the operation of parallel in – serial out shift register
7. With the logic diagram explain the operation of Serial in – serial out shift register
8. Explain four modes of operation in which the 4 bit shift register can be used
9. With the logic diagram , explain the operation of decade counter, waveforms and
truth table
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