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Thursday, 4 July 2013

Hydraulics and pneumatics-Model question paper for B.E/B.Tech

1(a) Write a note on different forms of pressure measurement. (6 Marks)
(b) With the help of a neat sketch, explain the working of turbine flowmeter. (6 Marks)
(c) State and explain Pascal’s law. (4 Marks)
(d) Explain the law which relates pressure and volume. (4 marks)
2(a) What is a vane pump. Explain its working. (6 Marks)
(b) Distinguish between inlet line filter, pressure line filter and return line filter. (6 Marks)
(c) Explain the role of loading valve in hydraulic pumps. (4 Marks)
(d) Write a note on priming in hydraulic pumps. (4 Marks)
3(a) Explain the working of Lobe compressor. (4 Marks)
(b) What is the role of air receiver in compressors? (4 Marks)
(c) Write notes on relative humidity and moisture content curve. (6 Marks)
(d) With the help of a neat sketch, explain the working of pilot-operated regulator. (6 Marks)
4(a) Distinguish between 2/2 poppet valve and 3/2 poppet valve. (6 Marks)
(b) Draw function symbol and conventional symbol of check valve. (4 marks)
(c) Write notes on shuttle and fast exhaust valves. (6 Marks)
(d) Servo valves are generally used as part of an external control loop in a feedback control system. Explain. (4 Marks)
5(a) What is an actuator? What are the three types of actuators? (4 marks)
(b) Write a brief note on composite seal. (4 Marks)
(c) Write a note on Bleed-off speed control. (4 Marks)
(d) Explain actuator synchronization. (8 Marks)
6(a) Explain the method of sizing an accumulator. (4 Marks)
(b) Write a detailed note on pneumatic piping, hoses and connections. (8 Marks)
(c) What is safety factor? What is its role in hydraulic and pneumatic systems? (4 Marks)
(d)Reservoirs are generally constructed from welded steel plate with thin side walls. Explain why? (4 Marks)
7(a) What is a flapper nozzle? Mention its applications. (5 Marks)
(b) Write notes on butterfly valve and ball valve. (6 Marks)
(c) Distinguish between fail-up actuator and fail-down actuator. (6 Marks)
(d) Mention three uses of valve positioned. (3 Marks)
8(a) Write a note on different steps involved in a fault-finding process. (8 Marks)
(b) Write a note on fault finding instruments. (6 Marks)
(c) Write a note on pneumatic maintenance check. (6 Marks)