4030531 - Control of Electrical machines. 14- Mark important Questions

 

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CEM IMPORTANT QUESTIONS FOR OCT 2023 BOARD EXAM

Control of electrical machines 

Unit 1

1. Simple ON-OFF Motor control circuit

2.Capacitive and inductive proximity sensor

3.Push button switch and selector switch 

4.contractor and solenoid type contractor and solenoid valve

Unit-2 

1.DOL starter

2. Semi and automatic star delta starter

3. secondary frequency  accelerator starter

4.Counter emf.starter 

Unit-3

1.Different trouble spot

2.Control circuit and power circuit of battery

3.Control circuit of elevator

4. Procedure for troubleshooting control circuits

Unit-4 

1. Block diagram and operation of PLC

2 .PLC Scan 

3. Input and output module of PLC

4. Logic input and analog input

Unit-5

1.Ladder logic for star delta  and DOL starter 

2.Program and Programming language of PLC

3.Relay types instruction used in PLC 

4.Sequence of operation CTD and CTU

CEM VVI IMPORTANT QUESTIONS👇

CEM Important Questions: 

UNIT-1:

1. Explain the working of Electrical & Mechanical Interlocking of Drives with a neat sketch.

2. Explain the working of an Electronic Timer with neat sketch.

3. Explain the working of float switch with neat sketch….

UNIT-2:

1. Draw the control circuit of Semi-automatic (or) Automatic Star-Delta starter with a neat sketch.

2. Explain the working of Automatic Rotor Resistance starter with a neat sketch.

3. Explain the working of Two speed pole changing motor with neat sketch.

UNIT-3:

1. Draw and explain the control circuit of Planner machine.

2. Draw and explain the working of Automatic water level operation of motor.

3. What are the trouble spot in control circuit.

UNIT-4:

1. Explain the working of operation of PLC with each block diagram.

2. With a neat sketch, explain about PLC Scan.

3. Compare hardwire control system versus PLC system.

UNIT-5:

1. Explain the ladder logic diagram for star-delta starter with control circuit.

2. Explain the Ladder Logic Diagram for Automatic rotor resistance starter with control circuit.

3. Develop a Ladder Logic Diagram for EB to Generator changeover system and explain the sequence of operation.

Control of Electrical machines. 14- Mark important Questions

 

Unit 1

1. Draw the control circuit of electrical and mechanical interlocking

and explain briefly.

 2. Explain with circuit diagram the principle of operation of single

phasing preventer.

 3. Explain the working principle of electronic timer. 

4. Explain the working principle of Pneumatic timer.

 5. Explain the working principle of solid state relay

Unit 2

6. Draw and explain the construction and working of jogging and

inching of DC motor. 

7. Draw the connection diagram of two winding for two speed control

in induction motor. 

8. Explain with neat circuit diagram the working of automatic star-delta

starter. 

9. Explain with neat circuit diagram the working of series relay starter.

 10. Explain the operation with a control circuit, how dynamic

braking is done in cage induction motor. 11. Draw the control circuit for automatic rotor resistance starter

for three phase slip ring induction motor and explain. 

Unit-3

12. Explain the circuit operation of electric oven. 

13. Explain skip hoist and it’s control circuit. 14. Explain the mechanical arrangements and control circuit of

automatic control of a water pump. 15. Explain air compressor and it’s control circuit.

16. Explain the trouble spot in control circuit.

 Unit-4

17. Draw the schematic and wiring diagram for input/output

modules and explain. 

18. Draw the Block diagram of a PLC system and explain the

function of each block. 

19. Explain the process of PLC scan.

 20. Explain in detail about the different programming devices. 

21. Explain the various criteria for selection of suitable PLC. 

Unit-5

22. Develop a ladder logic diagram for rotor resistance starter. 

23. Develop a ladder logic diagram for automatic star-delta starter.

 24. Develop a ladder logic diagram for DOL starter

25. Develop a ladder logic diagram for EB to generator change

over system. 

26. Explain with  block diagram the operation of SCADA.