Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 3rd Sem New 2132502 Engineering Thermodynamics And Heat Transfer Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?III (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2132502 Date: 11/06/2019
Subject Name: Engineering Thermodynamics & Heat transfer
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.
MARKS
Q.1 (a) How Engineering Thermodynamics & Heat Transfer will be helpful to you? 03
(b) Explain the following terms:
(1) System
(2) Property
(3) Boundary
(4) Pure substance
04
(c) State First Law of Thermodynamics. Explain the application of it to open
and close systems.
07
Q.2 (a) Explain the following terms:
(1) Entropy
(2) Triple point
(3) Critical Point
03
(b) Define energy and exergy with suitable example. 04
(c) Write Kelvin?s and Clausius statements of second law. Describe the concept of
reversibility and irreversibility
07
OR
(c) Write a short note on Carnot Cycle. 07
Q.3 (a) Classify various types of irreversibility. 03
(b) Derive general steady flow energy equation. 04
(c) Explain the process of steam formation using p-v and h-s diagram. 07
OR
Q.3 (a) Compare the terms: conduction and convection. 03
(b) Explain the following laws:
(1) Fourier?s Law of heat conduction
(2) Newton?s Law of cooling
04
(c) Define Property. State difference between Microscopic approach and
Macroscopic approach.
07
Q.4 (a) Differentiate between laminar and turbulent flows. 03
(b) Differentiate between steady state and transient heat conduction. 04
(c) State the types of heat convection and differentiate between them. 07
OR
Q.4 (a) Write the general three dimensional general heat conduction equation in:
(1) Cartesian co-ordinates
(2) Cylindrical co-ordinates
(3) Spherical co-ordinates
03
(b) Discuss the factors which affect the convective heat transfer coefficient. 04
(c) Derive the dimensional less numbers as applied to the analysis of forced
convection by dimensional analysis.
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?III (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2132502 Date: 11/06/2019
Subject Name: Engineering Thermodynamics & Heat transfer
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.
MARKS
Q.1 (a) How Engineering Thermodynamics & Heat Transfer will be helpful to you? 03
(b) Explain the following terms:
(1) System
(2) Property
(3) Boundary
(4) Pure substance
04
(c) State First Law of Thermodynamics. Explain the application of it to open
and close systems.
07
Q.2 (a) Explain the following terms:
(1) Entropy
(2) Triple point
(3) Critical Point
03
(b) Define energy and exergy with suitable example. 04
(c) Write Kelvin?s and Clausius statements of second law. Describe the concept of
reversibility and irreversibility
07
OR
(c) Write a short note on Carnot Cycle. 07
Q.3 (a) Classify various types of irreversibility. 03
(b) Derive general steady flow energy equation. 04
(c) Explain the process of steam formation using p-v and h-s diagram. 07
OR
Q.3 (a) Compare the terms: conduction and convection. 03
(b) Explain the following laws:
(1) Fourier?s Law of heat conduction
(2) Newton?s Law of cooling
04
(c) Define Property. State difference between Microscopic approach and
Macroscopic approach.
07
Q.4 (a) Differentiate between laminar and turbulent flows. 03
(b) Differentiate between steady state and transient heat conduction. 04
(c) State the types of heat convection and differentiate between them. 07
OR
Q.4 (a) Write the general three dimensional general heat conduction equation in:
(1) Cartesian co-ordinates
(2) Cylindrical co-ordinates
(3) Spherical co-ordinates
03
(b) Discuss the factors which affect the convective heat transfer coefficient. 04
(c) Derive the dimensional less numbers as applied to the analysis of forced
convection by dimensional analysis.
07
2
Q.5 (a) Define Reflectivity, Absoprtivity and Transmissivity of a surface. 03
(b) State and express in equation: Stefan Boltzmann law of radiation and
Kirchhoff?s law of radiation.
04
(c) Classify various heat exchangers. Explain any one in brief. 07
OR
Q.5 (a) What do you mean by fouling factor? What are causes of fouling? 03
(b) How the cross-flow and multipass heat exchangers are analyzed using
LMTD method?
04
(c) Define Radiation. Classify and explain various types of bodies. 07
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This post was last modified on 20 February 2020