Pune University BE Exam Papers Manufacturing Automation and Control

Pune University BE Exam Papers Manufacturing Automation and

Control

B.E. (Production) MANUFACTURING AUTOMATION AND CONTROL (2008 Pattern) (Sem. – I)

Time: 3 Hours]                                                                                           [Max. Marks :100

Instructions to the candidates:

1)           Answer any three questions from each section.

2)           Answers to the two sections should be written in separate books.

3)           Neat diagrams must be drawn wherever necessary.

4)           Figures to the right indicate full marks.

5)           Assume suitable data, if necessary.

SECTION – I

Q1) a) Explain primary functions and quality properties of a hydraulic fluid. [4]

b)           What are the basic characteristics of positive displacement pumps. [4]

c)            Explain with neat sketch the gear pump and also derive an expression for its flow.   [8]

OR

Q2) a) Explain the procedure to design the reservoir used in hydraulic circuit.

[8]

b) A pump has displacement of 80 cm3/rev. if delivers 77 liters/min when operated at 1000 r.p.m and 70 bar. If the input torque of the prime mover is 100 N-m, [8]

i)              What is the overall efficiency of the pump?

ii)           What is the theoretical torque required to operate the pump?

Q3) a) Draw neat sketch and explain working of hydraulic circuit for drilling machine.   [8]

b)           Explain the procedure of selecting a directional control valve in typical circuit.         [8]

OR

 

Q4) a) Draw neat sketch and explain working of hydraulic circuit for sequencing of two double acting cylinder.                                                                                [8]

b) With the help of sketches explain different types of accumulators with industrial applications.                                                                                              [8]

Q5) Draw a neat sketch and explain working of (any three) :                  [18]

a)             Shuttle valve.

b)            Time delay valve.

c)            Proportional valve.

d)           FRL unit in pneumatic systems.

OR

Q6) a) Draw a pneumatic circuit to actuate the two cylinder in following sequence :        [10]

i)              Cylinder 1 extend

ii)           Cylinder 2 extend

iii)         Cylinder 1 retract

iv)         Cylinder 2 retract

b) Explain with the help of neat sketch fluidic devices also state its advantages and disadvantages.                                                                                           [8]

SECTION – II

Q7) a) Explain i) Address bus ii) Data bus iii) Instruction set of typical microprocessor.  [8]

b) Explain pin diagram of 8085 microprocessor.                                                                                             [8]

OR

Q8) a) Explain with neat sketch various components of PLC.                   [8]

b)            Construct a ladder diagram for following boolean equations [8]

i)              y = (x1 + x2). (x3 + x4)

ii)           y = (x1.x2)

Q9) a) What are A/D and D/A convertors? Discuss how they can be interfaced with a microprocessor.                                                                                [8]

b) Draw a ladder diagram to actuate a motor control relay. When the motor is “ON” a red lamp glows and when the motor is “OFF” green lamp glows. Explain various logic gates used in ladder diagram.                                                                           [8]

OR

Q10)a) What is meant by PID control? Explain with the help of a diagram the working of PID control used in machine tools.                                                       [8]

b) Write short notes on :                                                                          [8]

i)              Linear feedback control system.

ii)           Optimal control system.

Q11)a) Explain various transfer mechanism used in automated system. [6]

b)            Explain design for automated system.                                                  [6]

c)            What factors should be considered while deciding types of transfer device to be used in automated systems.                                                                                  [6]

OR

Q12)Short notes on any three :                                                                     [18]

a)            Indexing mechanism.

b)            Continuous transfer system.

c)            Feeders used in factory automations.

d)            Synchronous and non-synchronous material transfer.

Pune University BE Exam Papers Manufacturing Automation and Control

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