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DIPLOMA ENGINEERING – SEMESTER – III • EXAMINATION – WINTER2015
Subject Code: 3331903 Date: 07-12 - 2015
Subject Name: Fluid Mechanics & Hydraulic Machines
Time:10:30 AM TO 1:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
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Q.1 Answer any seven out of ten. 14
1. Define Fluid.
2. Define Specific gravity and specific volume.
3. State the limitation of piezometer.
4. Enlist the different mechanical gauges.
5. (a)1 m3 = .......... litre (b)1 stoke =........ cm2 /s.
6. What is cohesion and Adhesion.
7. As temperature increase ,viscosity of liquid ______and for gas______.
8. SI Unit of following properties. (I) Bulk modulus of elasticity (II) Surface tension.
9. Water flow through a pipe having dia. 0.2 m with 4 m/s than find out discharge from pipe.
10. Give the relation between Absolute pressure ,Gauge pressure and Atmospheric pressure.
Q.2 (a) Classify different flow measuring devices. 03
OR
(a) Explain pitot static tube with sketch. 03
(b) State the Pascal’s law and prove it. 03
OR
(b) Explain Differential manometer with sketch and suitable formula. 03
(c) Water flow with 6 m/s velocity with 3200 lit/minute through a pipe than decide the size of
pipe. 04
OR
(c) Water flow with 2 lit/s from pipe of 200 mm diameter with 400 kpa pressure and pipe is 100 mm at a height from datum than find out Total Energy for ideal fluid. 04
(d) Explain the following form of energy (a) Pressure Energy (b)Potential Energy (3) Kinetic
energy. 04
OR
(d) Explain the following type of flow.
(I) Uniform flow and Non Uniform flow.
(II) One dimensional flow, two dimensional flow ,three dimensional flow. 04
Q.3 (a) Explain Rotameter with sketch. 03
OR
(b) Water flow with 30 cm head through rectangle notch having 60 cm length than find out discharge in lit/sec if Cd = 0.65. 03
OR
(b) If water flow through V notch having 120 0 angle with 50 cm head than find out its discharge , if Cd = 0.65. 03
(c) State the Principle of Bernoulli’s theorem with its limitation and assumption. 04
OR
(c) State the Reynold’s Number equation with S I unit of each parameter and effect of Reynold’s value on type of flow. 04
(d) Usefulness of surge tank to prevent water hammer with sketch. 04
OR
(d) Explain the Reynolds’s experiment with neat skecth. 04
Q.4 (a) Explain Multi stage pump in series and parallel. 03
OR
(a) Give the difference between Centrifugal Pump and Reciprocating Pump 03
(b) Describe reciprocating pump with neat sketch. 04
OR
(b) Describe Gear Pump with neat sketch. 04
(c) Explain the construction , working, advantages and Dis Advantages of pelton wheel with neat sketch.07
Q.5 (a) Explain Pressure Relief valve. 04
(b) Draw the symbols for following component (I)Vacuum Pump II) Pressure Gauge
III) Shuttle valve IV) Electic Motor 04
(c) Explain the working principle of Hydraulic press with sketch. 03
(d) Explain Hydraulic ( fluid ) Coupling. 03
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