Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 4th Sem 2140907 Applied Thermal And Hydraulic Engineering Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?IV (NEW) EXAMINATION ? WINTER 2020
Subject Code:2140907 Date:09/02/2021
Subject Name:Applied Thermal and Hydraulic Engineering
Time:02:30 PM TO 04:30 PM Total Marks:56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Explain in brief about the significance of the above subject in the field 03
of electrical engineering.
(b) Illustrate in brief, at least two innovations in the field of applied thermal 04
and hydraulic engineering.
(c) Explain in brief about four recent developments in the field of applied 07
thermal and hydraulic engineering.
Q.2 (a) Give a broad classification of hydraulic turbines.
03
(b) Define the following;
04
1) degree of reaction, 2) NPSH, 3) specific speed, 4) priming of the
pump.
(c) What do you mean by cavitation? Explain the cavitation phenomenon in 07
detail. State the places in the turbines and pumps where cavitation is
generally occurred.
Q.3 (a) What do you mean by guide blades? State function/s of guide 03
vanes/blades for the turbines and pumps.
(b) Enlist various flow measuring devices and pressure measuring devices.
04
(c) State and prove Bernoulli's equation.
07
Q.4 (a) State important properties of the fluid. Define any two of them.
03
(b) Illustrate with a neat sketch, construction and working of Pelton Wheel. 04
(c) With a neat sketch, discuss in detail, working and construction of Pitot 07
tube.
Q.5 (a) Define the following;
03
1) Thermal conductivity, 2) emissivity, 3) critical radius of insulation.
(b) `Aluminum utensils are not preferred for cooking purpose'. Justify.
04
(c) What should be the thickness of insulation on a small diameter wire and 07
a steam pipe? Explain the physical significance of the critical radius of
insulation in both the cases & derive an expression for the critical radius
of insulation for the cylindrical coordinate system.
Q.6 (a) Define the following;
03
1) Grey body, 2) black body, 3) shape factor.
(b) `It is desirable to wear white clothes instead of black clothes during 04
summer season'. Give reasons.
(c) Write the most general equation in Cartesian Coordinate system for heat 07
transfer by conduction. From the above equation, derive the followings
with suitable assumptions;
1) Fourier's equation,
2) Laplace equation,
3) Poission's equation.
Q.7 (a) State applications of Zeroth, First and Second law of thermodynamics.
03
(b) What are various methods to improve the efficiency of the Rankine 04
Cycle? Explain any one of them in brief.
(c) With a neat sketch, explain the construction and working of a simple 07
vapor compression refrigeration (VCR) cycle. Plot the same cycle on T-
s and p-h diagram also.
Q.8 (a) Define following term related to psychrometry;
03
(i) wet bulb temperature, (ii) dry bulb temperature, (iii) relative
humidity.
(b) What are various methods to improve the efficiency of the Brayton 04
Cycle? Explain any one of them in brief.
(c) With a neat sketch explain the Rankine cycle for thermal power plant. 07
Plot the same cycle on T-s and h-s diagram also.
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This post was last modified on 04 March 2021