Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem New 3132504 Basic And Applied Thermodynamics Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3132504 Date: 30/11/2019
Subject Name: Basic and Applied Thermodynamics
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) Define following terms.
1) Thermodynamics 2) System 3) Process
03
(b) Explain Zeroth law of thermodynamics with the help of suitable
example.
04
(c) Apply first law of thermodynamics to steady flow process and
derive steady flow energy equation.
07
Q.2 (a) Give statements of following terms in thermodynamics.
1) First law of thermodynamics 2) second law of
Thermodynamics 3) Entropy
03
(b) Discuss Concept of PMM1 and PMM2. 04
(c) Fluid enters a nozzle with a velocity 50 m/s and initial enthalpy is
3000 kJ/kg. The Enthalpy of fluid at the exit of nozzle is 2700kJ/kg.
Assume that the no heat interaction between nozzle and
surroundings. (assume change in potential energy is negligible)
Calculate
1) Velocity of fluid at exit of nozzle.
2) The mass flow rate when inlet area is 0.1m
2
and specific
volume at inlet is 0.2m
3
/kg.
07
OR
(c) A Carnot engine receives 5000kJ heat from a heat source at 427
0
C
and rejects heat to atmosphere at 27
0
C. Calculate the thermal
efficiency of engine and work produced by engine.
If engine is irreversible and efficiency of this irreversible engine is
75% of Carnot engine, find the percentage change in heat rejection
for the same heat input and temperature limits.
07
Q.3 (a) Show that violation of Kelvin plank statement leading to violation
of Clausius statement.
03
(b) Differentiate Carnot and Rankine Cycle. 04
(c) Determine expression for air standard efficiency of Otto cycle with
neat sketch of P-V and T-S diagram.
07
OR
Q.3 (a) Describe entropy change for irreversible process. 03
(b) Differentiate auto and Diesel cycle. 04
(c) Determine expression for efficiency of Rankine cycle with neat
sketch of their main components, P -V and T-S diagram.
07
Q.4 (a) Describe refrigeration effect and one tone of refrigeration 03
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3132504 Date: 30/11/2019
Subject Name: Basic and Applied Thermodynamics
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) Define following terms.
1) Thermodynamics 2) System 3) Process
03
(b) Explain Zeroth law of thermodynamics with the help of suitable
example.
04
(c) Apply first law of thermodynamics to steady flow process and
derive steady flow energy equation.
07
Q.2 (a) Give statements of following terms in thermodynamics.
1) First law of thermodynamics 2) second law of
Thermodynamics 3) Entropy
03
(b) Discuss Concept of PMM1 and PMM2. 04
(c) Fluid enters a nozzle with a velocity 50 m/s and initial enthalpy is
3000 kJ/kg. The Enthalpy of fluid at the exit of nozzle is 2700kJ/kg.
Assume that the no heat interaction between nozzle and
surroundings. (assume change in potential energy is negligible)
Calculate
1) Velocity of fluid at exit of nozzle.
2) The mass flow rate when inlet area is 0.1m
2
and specific
volume at inlet is 0.2m
3
/kg.
07
OR
(c) A Carnot engine receives 5000kJ heat from a heat source at 427
0
C
and rejects heat to atmosphere at 27
0
C. Calculate the thermal
efficiency of engine and work produced by engine.
If engine is irreversible and efficiency of this irreversible engine is
75% of Carnot engine, find the percentage change in heat rejection
for the same heat input and temperature limits.
07
Q.3 (a) Show that violation of Kelvin plank statement leading to violation
of Clausius statement.
03
(b) Differentiate Carnot and Rankine Cycle. 04
(c) Determine expression for air standard efficiency of Otto cycle with
neat sketch of P-V and T-S diagram.
07
OR
Q.3 (a) Describe entropy change for irreversible process. 03
(b) Differentiate auto and Diesel cycle. 04
(c) Determine expression for efficiency of Rankine cycle with neat
sketch of their main components, P -V and T-S diagram.
07
Q.4 (a) Describe refrigeration effect and one tone of refrigeration 03
2
(b) Differentiate refrigerator, heat pump and heat engine using suitable
diagram.
04
(c) Carnot cycle works on steam between the pressure limits of 7MPa
and 7KPa. Determine the thermal efficiency, turbine work and
compression work per kg. of steam.
Take enthalpy and entropy for 70 bar pressure as bellow.
h1 = hf1 = 1267.4 kJ/kg.
S1 = Sf1 = 3.1219 kJ/kg K.
h2 = hg 2 = 2773.5 kJ/kg.
S2 = Sg2 = 5.8162 kJ/kg K.
07
OR
Q.4 (a) Describe reverse Carnot cycle and give its limitations. 03
(b) Explain flow diagram of simple vapor compression refrigeration
system.
04
(c) An engine operating on diesel cycle has maximum pressure and
temperature of 45 bar and 1500
0
C. Pressure and temperature at
beginning of compression are 1 bar and 27
0
C. Determine air
standard efficiency of cycle take ? = 1.4 for air.
07
Q.5 (a) Show different processes of joule cycle on P ? V and T ? S diagram. 03
(b) Illustrate working of impulse turbine with neat sketch. 04
(c) List out methods of steam turbine compounding and explain any one
with neat sketch in detail.
07
OR
Q.5 (a) Show different processes of diesel cycle on P ? V and T ? S
diagram.
03
(b) Illustrate working of reaction turbine with neat sketch. 04
(c) List out methods for governing of steam turbine and explain any one
with neat sketch in detail.
07
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This post was last modified on 20 February 2020