JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV FLUID POWER SYSTEMS Previous Question Paper (January/February - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What are the advantages of hydraulic system?
Answer
Hydraulic systems offer high power-to-weight ratios, allowing for compact components that deliver significant force. They also provide precise control over speed, force, and direction, along with the ability to hold loads in position without continuous power consumption.
Write entire list of applications of fluid power in the automotive industry.
Answer
Fluid power is utilized in automotive applications such as hydraulic braking systems, power steering, automatic transmissions, active suspension systems, hydraulic jacks, clutch actuation, and automated assembly line robotics.
Sketch and explain double acting cylinder.
Answer
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Briefly classify valves based on the type of function performed.
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What is an FRL unit? Give the graphic symbol of it.
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Explain the three stages of preparation of compressed air.
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What is bleed-off circuit?
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What is the difference between a strainer and filters?
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Explain and draw the displacement time diagram?
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Explain pressure dependent control in pneumatics?
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Part B
With the neat sketch explain the components of hydraulic system.
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Explain the construction and working of an external gear pump.
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Explain the working of unbalanced vane pump. Also obtain an expression for its theoretical discharge.
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Explain the working principle of pilot operated check valve with a neat sketch. Illustrate the graphical symbol of the valve.
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Describe Flapper valve design and analysis?
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What is the principle and purpose of regenerative circuit? Explain the working of a typical regenerative circuit with neat sketch.
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With a neat sketch, explain pump unloading circuit.
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Sketch and explain construction and principle of operation of a quick exhaust valve.
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Explain with a neat sketch:
a) Time delay valve
b) Shuttle valve
c) Poppet valve
d) Solenoid valve.
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Discuss the ladder diagram connections for a dual cylinder sequencing circuit for the following sequence of operations: A+ B+ B- A-.
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Explain signal overlapping elimination using reversing valves. Draw a neat pneumatic circuit involving two cylinder and a reverse valve.
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