Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 5th Sem Old 151903 Fluid Power Engineering Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (OLD) EXAMINATION ? WINTER 2018
Subject Code:151903 Date: 16/11/2018
Subject Name: Fluid Power Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Explain jet propulsion of a tank with an orifice. 07
(b) Describe working function, principle, construction and working of hydraulic
press with neat sketch.
07
Q.2 (a) Derive expression of forces in X and Y direction for jet strikes on the symmetrical
curved plate at the center.
07
(b) Water is flowing through a pipe at the end of which a nozzle is fitted. The
diameter of the nozzle is 120 mm and the head of water at the center nozzle is 80
m. Find the force exerted by the jet of water on a fixed vertical plate. The
coefficient of velocity is given as 0.96. Also calculate the work done.
07
OR
(b) A jet of water from a nozzle is deflected through 60? angle from its original
direction by a curved plate which it enters without shock with a velocity of 30
m/s. If the discharge from the nozzle is 1 Kg/s, calculate the magnitude and
direction of the resultant force on the vane, if the vane is stationary.
07
Q.3 (a) Write comparison between Impulse and Reaction hydraulic turbine. 07
(b) A Pelton wheel having a mean bucket diameter of 1.25 m is running at 1000
RPM. The net head on the Pelton wheel is 800m. If the side clearance angle is
15?and discharge through the nozzle is 0.1 m
3
/s, Calculate: Power available at
the nozzle and hydraulic efficiency of the turbine.
07
OR
Q.3 (a) Describe draft tube theory. Derive expression for efficiency of draft tube. 07
(b) Classify different losses in the pipe flow. Explain any two minor losses. 07
Q.4 (a) Describe (a) minimum starting speed of centrifugal pump and (b) cavitation in
centrifugal pump.
07
(b) Define and derive specific speed relation for pump. 07
OR
Q.4 (a) Write down difference between Positive displacement pumps and Rotodynamic
pumps.
07
(b) Why reciprocating pump can not run at high speed? 07
Q.5 (a) Explain root blower with the neat sketch and derive expression for the Roots
efficiency.
07
(b) Why clearance volume is provided in Reciprocating compressor? 07
OR
Q.5 (a) Classify rotary compressors. 07
(b) Explain aerofoil blading with neat sketch and nomenclature related to aerofoil
blade.
07
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This post was last modified on 20 February 2020