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Industrial Fluid and Power Question Paper - Jun 17 - Diploma In Mechanical Engineering (Semester 6) - Maharashtra State Board of Technical Education (MSBTE)
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Industrial Fluid Power - MAY 17
Diploma In Mechanical Engineering (Semester 6)
Total marks: 100
Total time: 3 Hours
INSTRUCTIONS
(1) Draw neat diagrams wherever necessary.
1.a. Attempt any THREE of the following:
1.a.i.
What is function of (i) oil reservoir (ii) pressure relief valve,
(iii) direction control valve, (iv) filters ?
(4 marks)
11516
1.a.ii.
Draw and explain working of pressure reducing valve.
(4 marks)
11517
1.a.iii.
Explain piston pump with neat sketch.
(4 marks)
11518
1.a.iv.
What is an accumulator ? Why accumulator is necessary for huge
hydraulic pressers ?
(5 marks)
11519
1.b. Attempt any ONE of the following:
1.b.i.
Write the causes and remedies for the following :
(6 marks)
11520
(i) Excess heat in oil
(ii) Noisy pump
(iii) Low pressure in system.
1.b.ii.
What is pressure compensated flow control valve ? Explain with sketch.
(6 marks)
11521
2. Attempt any TWO of the following:
2.a.
Compare meter-in-circuit with meter-out-circuit, draw neat sketch of
meter-in-circuit.
(8 marks)
11522
2.b.
Name any eight pipe or tube fitting with their application.
(8 marks)
11523
2.c.
What is function of filters ? Classify the filters and draw any two types of
filters.
(8 marks)
11531
3. Attempt any FOUR of the following:
3.a.
Explain 4-way-3 position direction control valve used in hydraulic system.
(4 marks)
11525
3.b.
Explain gear pump with neat sketch.
(4 marks)
11526
3.c.
Explain any four criteria for selection of hydraulic pump in hydraulic system.
(4 marks)
11527
3.d.
Name any four components of pneumatic system. What are the factors
considered while selecting them ?
(4 marks)
11532
3.e.
Draw labelled sketch of air lubricator.
(4 marks)
11533
4.a. Attempt any THREE of the following:
4.a.i.
What are actuators ? Draw a double acting cylinder.
(4 marks)
11530
4.a.ii.
Explain pressure relief valve in pneumatic system.
(4 marks)
11534
4.a.iii.
Explain with sketch, a pneumatic circuit for speed control of
bidirectional motor.
(4 marks)
11535
4.a.iv.
State any two applications of 3 × 2 DC valve. Draw symbol for the
same.
(5 marks)
11536
4.b. Attempt any ONE of the following:
4.b.i.
Explain with neat sketch the working of variable displacement vane
pump.
(6 marks)
11537
4.b.ii.
Compare pressure relief valve and pressure reducing valve.
(6 marks)
11538
5. Attempt any TWO of the following:
5.a.
List the factors to be considered for selecting the pipe while designing the
pneumatic system. Give specification of pipes for the pneumatic system.
(8 marks)
11539
5.b.
Draw and explain pneumatic meter in circuit to control of speed extension.
(8 marks)
11540
5.c.
Explain with neat sketch (position based) working of sequencing circuit for
two double acting Air cylinders.
(8 marks)
11541
6. Attempt any FOUR of the following:
6.a.
Draw speed control of single acting cylinder pneumatic circuit using 3 × 2 DC
valve.
(4 marks)
11542
6.b.
State any four reasons of failure of pneumatic seals.
(4 marks)
11543
6.c.
What are the advantages of pneumatic system over hydraulic systems ?
(4 marks)
11544
6.d.
Compare positive displacement pump with Rotodynamic pump.
(4 marks)
11545
6.e.
What are the various types of Hoses used in pneumatic system ?
(4 marks)
11546
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