MODEL QUESTION PAPER - INDUSTRIAL DRIVES AND CONTROL-6th SEM ELECTRICAL & ELECTRONICS ENGINEERING

Department Of Technical Education

DIPLOMA IN

ELECTRICAL & ELECTRONICS ENGINEERING

Sixth Semester

 

MODEL QUESTION PAPER

Subject: - INDUSTRIAL DRIVES and CONTROL

 

Max Marks: 100                                                                                                        Duration: 3 Hrs

 

Instruction:

                         1. Section one is compulsory

                         2. Answer any two full questions from each of the remaining 3 sections

 

Section – I

 

1  a) Fill in the blanks with appropriate word / words                                               (1 X 5 = 5)

 

i)                    In II quadrant operation the motor produces _________ Torque.

ii)                  Free running is absent in _________ traction service

iii)                In industrial robotics _________ motor is used

iv)                The _________ diagram is the basic diagram from which other circuits diagrams are developed

v)                  The area between speed time curve and time axis gives _________

 

b) Write a short note on multi quadrant operation of motors                                                  (5)

 

Section – II

 

2  a) Draw the process flow diagram of paper mill and explain different                                   9

Stages

b) Select suitable for the following and justify a) Sugar Centrifuge                                            3

c) Select suitable motors for the following and justify your selection                                         3

I) Cranes & Hoist

 

3  a) Draw the process flow diagram of the cement mill and explain different

Stages                                                                                                                                            7

b) Select suitable FHP motor for the following and state the reasons                                          4

i) Robotics ii) cnc

 

c)  Select suitable motor for the following and state the reasons                                                 4

i) Compressors ii) sugar centrifuge Machine

 

4  a) Explain four types of drives                                                                                                8

b) State advantages of electric drive                                                                                      2

c) Draw the block diagram of slip recovery system for wound rotor

Induction motor and explain its operation                                                                              5

 

 

 

 

Section – III

 

5  a) Explain speed time curve in main service line                                                                  9

b) List the advantages and disadvantages of electric traction                                                             3

c) Explain single arm pantograph current collector                                                                   3

 

6   a] explain diesel electric traction                                                                                         7

b) Explain regenerative braking for 3 – phase induction motor                                                4

c) Explain train lighting                                                                                                            4

 

7  a) what is preventive maintenance list its advantages & disadvantages                               8

b) Explain different causes and remedies of troubles in electric traction                                 5

c) State the motors used in electric traction                                                                               2

 

Section – IV

 

8  a) Draw the block diagram of the open loop and closed loop control

System and explain                                                                                                                    9

b) Describe automatic control system                                                                                        3

c) List the different diagrams used in motor control circuit                                                      3

 

9  a) Describe closed loop speed control of motor                                                                    7

b) Define motor control circuit                                                                                                  4

c) Develop forward and reverse motor control circuit                                                               4

 

10  a) Describe advantages of distributed control system                                                         8

b) Explain functional requirements of distributed process control system                                5

c] Define motor control centre                                                                                                   2