***********
DIPLOMA ENGINEERING – SEMESTER – III • EXAMINATION – SUMMER-2016
Subject Code: 3331903 Date: 20.05.2016
Subject Name: Fluid Mechanics and Hydraulic Machines
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.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
***********
Q.1 Answer any seven out of ten. 14
1. Definition of Ideal fluid and Real fluid.
2. State Pascal’s Law.
3. Give the S.I. unit of following fluid properties.
(1) Density (2) Specific volume
(3) Surface Tension (4) Kinematic Viscosity.
4. Fill in the blanks. (1) 1 bar = _____N/m2. (2) 760 mm of Hg = ________ Pa.
5. Write down only Euler Equation.
6. Calculate the specific weight & Density of one liter of a liquid which weights.
7. State limitation of Pizometer.
8. Assumptions of Bernoulli’s Equation.
9. Define Draft tube with figure.
10. Explain Newton’s law of Viscosity.
Q.2 (a) Define fluid and classification of fluid. 03
OR
(a) Classify Pressure Measuring Devices. 03
(b) Define following Terms.
(1) Absolute Pressure (2) Gauge Pressure (3) Vacuum Pressure 03
OR
(b) Define following Terms. (1) Stream Line (2) Path Line (3) Stream Tube 03
(c) Water flow with 300 liter/sec in a pipe. The diameter of pipe is 500 mm and pressure
is 900 kPa. If the centre line of pipe is at 200 m from the base, find the total energy. 04
OR
(c) If maximum velocity of fluid is 5 m/s and quantity of fluid flow is 3000 lit/min
then find out Diameter of pipe. 04
(d) List only name of Different Types of fluid flow. 04
OR
(d) Derive Bernoulli’s Equation from Euler’s Equation. 04
Q.3 (a) State the equation for measuring flow through following devices.
(1) Pitot Tube (2) Venturimeter (3) Flow Nozzle. 03
OR
(a) Explain with neat sketch “Rotameter”. 03
(b) Explain following Hydraulic co- efficient.
(1) Co-efficient of Contraction (2) Co-efficient of Discharge (3) Co-efficient of Velocity 03
OR
(b) Discharge through Rectangular Notch is 48 m3/min. When head of water is
one third of length of notch, calculate length of Notch. Take Cd = 0.62. 03
(c) A horizontal Venturimeter is use for measuring discharge of water, whose
inlet and throat diameters are 30 cm and 15 cm respectively. The reading of
differential manometer connected between inlet and throat is 12 cm of
mercury. If the Co-efficient of Venturimeter is 0.98, find the discharge. 04
OR
(c) Water is flowing through a pipe of 150 mm diameter and 400 m length. If
discharge is 35.4 lit/sec, calculate head loss due to friction. Take f = 0.01. 04
(d) With neat sketch explain the Reynolds’s Experiments. 04
OR
(d) Explain water hammer effect and arrangement to overcome water hammer effect. 04
Q.4 (a) Give the classification of Pumps. 03
OR
(a) Difference between Impulse Turbine and Reaction Turbine. 03
(b) Find the specific speed of turbine and type of turbine, if head is 50 m and
turbine discharge 10 m3/s which running at 350 rpm. Take efficiency is 85%. 04
OR
(b) Describe Centrifugal Pump with neat sketch. 04
(c) Explain with neat sketch Lay-out of a Hydro Electric Power plant and also
explain efficiency of Turbine. 07
Q.5 (a) Name the element use in Pneumatic Circuit. 03
(b) Explain Hydraulic Cylinders. 03
(c) Explain the working of Hydraulic lift with neat sketch. 04
(d) Draw the following symbols in Pneumatic circuit.
(1) Hydro pump (2) Pressure Regulator
(3) Pressure gauge (4) Accumulator. 04
************
No comments:
Post a Comment