### FORMAT OF I A TEST QUESTION PAPER (CIE) | HYDRAULICS & PNEUMATICS | I/II SEM | DIPLIMA

FORMAT OF I A TEST QUESTION PAPER (CIE)

 Test/Date and Time Semester/year Course/Course Code Max Marks Ex: I test/6 th weak of sem 10-11 Am I/II SEM HYDRAULICS & PNEUMATICS 20 Year: Name of Course coordinator :                                                                                             Units:   CO’s: Question no Question MARKS CL CO PO 1 2 3 4

Note: Internal choice may be given in each CO at the same cognitive level (CL).

MODEL QUESTION PAPER

4- Semester Diploma Examination

HYDRAULICS AND PNEUMATICS

Time: 3 Hours]                                                           [Max Marks: 100

Note: Answer any SIX from Part A and any SEVEN from Part B

Part A                         6x5=30 marks

1.     List the different properties of the fluid.

2.     Define the following

i)  Laminar flow                                         ii)    Turbulent flow, iii)Steady flow                                         iv) Uniform flow

3.Identify major energy losses and minor energy losses. 4.State the applications of Hydraulics system.

5. Explain manometer and classify. 6.Classify of control valves.

7. Explain the general layout of pneumatic system.

8. The water is flowing through a pipe having diameters 200 mm and 100 mm at sections 1 and 2 respectively. The rate of flow through pipe is 35 litres/sec. The section 1 is 6 m

above datum and section 2 is 4 m above datum. If the pressure at section 1 is 39.24 X 104 N/m2 ,find the intensity of pressure at section 2.

9. APelton wheel develops 2000KW under a head of 100meters, and with an overall efficiency of 85%. Find the diameter of the nozzle, if the coefficient of velocity for the nozzle is 0.98.

Part-B

10.   a)Explain with neat sketch the pitot tube. 04

b)An oil of specific gravity 0.8 is flowing through a venturi meter having inlet 06diameter 200mm and throat diameter 100mm.The oil-mercury differential manometer shows a reading of 250 mm. Calculate the discharge of oil through the horizontal venturi meter. Take Cd = 0.98.

11.a)Indicate the factors for selection of Hydraulic turbine. 04

b)A Pelton wheel develops 2000KW under a head of 100meters, and with an overall efficiency of 85%. Find the diameter of the nozzle, if the coefficient of velocity for the nozzle is 0.98.

12. a)Write short on air motors.

b)Explain with neat sketch, the double-acting cylinder. 13.a)Sketch and explain the gear pump.

b)Sketch and explain the Spring loaded Accumulator. 14.a)Explain hydraulic gradient and total energy lines.

b)Find the loss of the head, due to friction, in a pipe of 500 mm diameter and 1.5 kilometers long. The velocity of water in the pipe is 1m/s.

Take coefficient of friction as 0.005. 15.a)Classify of control valves. 4

b)Sketch and explain the 5/2 DC valve.      6

16.a)  Explain the terms with units. 4

i)   Dynamic viscosity ii)kinematic viscosity. b)Illustrate the relationship between different pressure with the diagram. 6 17.a)Explain the continuity equation and Bernoulli’s equation.                                      5

b)Explain with neat sketch the working of a multistage pump for the high head.                                                              5 18.a)Explain slip, negative slip and Percentage Slip of Reciprocating pump. 5

b)Explain briefly FRL unit.

19.Distinguish between :                                                                                          10.

i) Steady flow and unsteady flow                       ii) Uniform and non uniform flow

iii) Compressible and incompressible flow         iv) Rotational and irrotational flow