Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 6th Sem New 2162004 Hydraulic And Pneumatic Systems Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VI (New) EXAMINATION ? WINTER 2019
Subject Code: 2162004 Date: 06/12/2019
Subject Name: Hydraulic & Pneumatic Systems
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Write pros and cons of pneumatic system over hydraulic
system.
03
(b) Explain major parts which are essentially needed to design and
construct a hydraulic system.
04
(c) Compare hydraulic system with mechanical, electrical and
pneumatic system.
07
Q.2 (a) Explain different locations of filter in hydraulic circuit. 03
(b) With neat sketch explain construction and working of push
button operated spring return 3/2 DCV.
04
(c) Explain construction and operation of time delay valve.
Explain significance of different components present in a
Time delay valve.
07
OR
(c) Explain construction and working of pressure relief valve with
schematic diagram.
07
Q.3 (a) What is the significance of heating and cooling devices in
hydraulic system?
03
(b) Enlist different types of accumulators. Explain dead weight
and spring loaded accumulators.
04
(c) With neat sketch explain working and construction of gear
pump. What is trapped oil in terms of internal gear pump?
07
OR
Q.3 (a) Explain any four major functions of hydraulic reservoir. 03
(b) Write a short notes on fire resistant and bio-degradable oils. 04
(c) Draw the hydraulic circuit for a vertical cylinder in such a way
that the cylinder while extending or retracting does not fall
when the power cuts. Show equations of power loss during
retraction of the vertical cylinder.
07
Q.4 (a) Give the detail classification of Actuators. 03
(b) Draw and explain Meter-in and Meter out circuit. 04
(c) What is the significance of cushioning system? Explain
cushion assembly in detail.
07
OR
Q.4 (a) What is Hydrostatic transmission? Give its applications. 03
(b) Draw and explain the regenerative circuit. What are the
advantages and disadvantages of it?
04
(c) What is FRL unit? Explain any two component of FRL unit
with schematic diagram.
07
Q.5 (a) What is the purpose of center condition in 4/3 DCV? Explain
any two center condition in detail.
03
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? VI (New) EXAMINATION ? WINTER 2019
Subject Code: 2162004 Date: 06/12/2019
Subject Name: Hydraulic & Pneumatic Systems
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Write pros and cons of pneumatic system over hydraulic
system.
03
(b) Explain major parts which are essentially needed to design and
construct a hydraulic system.
04
(c) Compare hydraulic system with mechanical, electrical and
pneumatic system.
07
Q.2 (a) Explain different locations of filter in hydraulic circuit. 03
(b) With neat sketch explain construction and working of push
button operated spring return 3/2 DCV.
04
(c) Explain construction and operation of time delay valve.
Explain significance of different components present in a
Time delay valve.
07
OR
(c) Explain construction and working of pressure relief valve with
schematic diagram.
07
Q.3 (a) What is the significance of heating and cooling devices in
hydraulic system?
03
(b) Enlist different types of accumulators. Explain dead weight
and spring loaded accumulators.
04
(c) With neat sketch explain working and construction of gear
pump. What is trapped oil in terms of internal gear pump?
07
OR
Q.3 (a) Explain any four major functions of hydraulic reservoir. 03
(b) Write a short notes on fire resistant and bio-degradable oils. 04
(c) Draw the hydraulic circuit for a vertical cylinder in such a way
that the cylinder while extending or retracting does not fall
when the power cuts. Show equations of power loss during
retraction of the vertical cylinder.
07
Q.4 (a) Give the detail classification of Actuators. 03
(b) Draw and explain Meter-in and Meter out circuit. 04
(c) What is the significance of cushioning system? Explain
cushion assembly in detail.
07
OR
Q.4 (a) What is Hydrostatic transmission? Give its applications. 03
(b) Draw and explain the regenerative circuit. What are the
advantages and disadvantages of it?
04
(c) What is FRL unit? Explain any two component of FRL unit
with schematic diagram.
07
Q.5 (a) What is the purpose of center condition in 4/3 DCV? Explain
any two center condition in detail.
03
2
(b) Explain construction and operation of shuttle valve, twin
pressure valve
04
(c) Prepare the pneumatic system to perform automatic to and
fro motion of double acting pneumatic cylinder and explain
working of it.
07
OR
Q.5 (a) Draw the standard symbols of Counter balance valve, pilot
operated check valve and Unloading valve.
03
(b) Explain construction and operation of quick exhaust valve.
Also draw its pneumatic symbols.
04
(c) Explain construction and working of proportional valve
using schematic diagram.
07
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This post was last modified on 20 February 2020