Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem New 2162004 Hydraulic And Pneumatic Systems Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2162004 Date:20/11/2018
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.
a
MARKS
Q.1 (a) Mention the major area of application of hydraulic system 03
(b) Explain major parts which are essentially needed to design and
construct a hydraulic system.
04
(c) Explain the following properties of hydraulic fluid.
(i) Bulk Modulus (ii) Specific Gravity (iii) System Compatibility
(iv) Flash Point (v) Demulsibility (vi) Fire Resistance (vii)
Lubricity.
07
Q.2 (a) Draw the standard symbols of adjustable pressure relief valve,
adjustable pressure reducing valve and pressure compensated
flow control valve.
03
(b) Compare hydraulic system and pneumatic system with their pros
and cons.
04
(c) Explain the construction and working of external gear pump
using schematic diagram.
07
OR
(c) Explain construction and working of proportional valve using
schematic diagram.
07
Q.3 (a) Explain gas charges accumulator using schematic diagram. 03
(b) Explain construction and working of Quick Exhaust Valve. 04
(c) With illustrative example explain following phenomenon in
context of hydraulic power transmission.
?Pressure and flow rate are independent to each other?
07
OR
Q.3 (a) Explain different locations of filter in hydraulic circuit. 03
(b) Draw and explain the regenerative circuit. What are the
advantages and disadvantages of it?
04
(c) Explain cushion assembly in detail for pneumatic system. What
is the requirement of it?
07
Q.4 (a) What is the significance of heating and cooling devices in
hydraulic system?
03
(b) Give detail classification of hydraulic cylinder according to
construction.
04
(c) Show and explain the power diagram for Meter-in and Meter-out
circuits.
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2162004 Date:20/11/2018
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.
a
MARKS
Q.1 (a) Mention the major area of application of hydraulic system 03
(b) Explain major parts which are essentially needed to design and
construct a hydraulic system.
04
(c) Explain the following properties of hydraulic fluid.
(i) Bulk Modulus (ii) Specific Gravity (iii) System Compatibility
(iv) Flash Point (v) Demulsibility (vi) Fire Resistance (vii)
Lubricity.
07
Q.2 (a) Draw the standard symbols of adjustable pressure relief valve,
adjustable pressure reducing valve and pressure compensated
flow control valve.
03
(b) Compare hydraulic system and pneumatic system with their pros
and cons.
04
(c) Explain the construction and working of external gear pump
using schematic diagram.
07
OR
(c) Explain construction and working of proportional valve using
schematic diagram.
07
Q.3 (a) Explain gas charges accumulator using schematic diagram. 03
(b) Explain construction and working of Quick Exhaust Valve. 04
(c) With illustrative example explain following phenomenon in
context of hydraulic power transmission.
?Pressure and flow rate are independent to each other?
07
OR
Q.3 (a) Explain different locations of filter in hydraulic circuit. 03
(b) Draw and explain the regenerative circuit. What are the
advantages and disadvantages of it?
04
(c) Explain cushion assembly in detail for pneumatic system. What
is the requirement of it?
07
Q.4 (a) What is the significance of heating and cooling devices in
hydraulic system?
03
(b) Give detail classification of hydraulic cylinder according to
construction.
04
(c) Show and explain the power diagram for Meter-in and Meter-out
circuits.
07
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2
OR
Q.4 (a) Explain construction and working of spring loaded check Valve
using schematic diagram.
03
(b) Write applications of hydrostatic transmission. 04
(c) Prepare the pneumatic system to perform automatic to and fro
motion of double acting pneumatic cylinder and explain
working of it.
07
Q.5 (a) Explain functions of FRL unit. 03
(b) Explain construction and working of logic Valve used for
pneumatic system
04
(c) Design and explain regenerative hydraulic circuit. 07
OR
Q.5 (a) Explain Overlap in hydraulic valves with sketch. 03
(b) What is trapped oil in terms of gear pump? Explain with schematic
diagram.
04
(c) A pneumatic system is used for punching machining. Design a
pneumatic circuit to control a double acting cylinder using 5/2 air-
air valve and time delay valve. The piston should extend when two
push buttons are pressed simultaneously and automatically retract
after fully extended and after specified time delay.
07
*************
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This post was last modified on 20 February 2020