B B4805 Pages: 2

Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FOURTH SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018

Course Code: AU202
Course Name: ADVANCED THERMODYNAMICS (AU)
Max. Marks: 100 Duration: 3 Hours
(Use of approved data book is permitted)
PART A
Answer any three full questions, each carries 10 marks. Marks

1 2) Differentiate between cclassical thermodynamics and _ sstatistical (4)

thermodynamics.
b) What is meant by quasi-static process. (2)
c) Define Intensive and Extensive properties with examples. (4)
2 ஐ Differentiate between flow process and non-flow process. (3)
b) What are the applications of thermodynamics? (3)
c) Define the path function and point function. (4)

3 a) Ifa gas of volume 6000 cm’ and at pressure of 100 KPa is compressed quasi (4)
statically according to PV*=constant. Until the volume become 2000 cm’,
determine the final pressure and work transfer.

b) Write short note on any three temperature measuring devices. (6)

4 Air flow steadily at the rate of 0.5 kg/s through an air compressor, entering at (10)
7m/s velocity,100 kPa pressure, and 0.95m*/kg volume, and leaving at 5m/s,
700kPa and 0.19m*/kg. The internal energy of air leaving is 90kJ/kg greater
than that of air entering. Cooling water in the compressor jackets absorbs heat
from the air at the rate of 58kW.

i) Compute the rate of shaft work input to the air in kW.
ii) Find the ratio of the inlet pipe diameter to outlet pipe diameter.
PART B
Answer any three full questions, each carries 10 marks.
5 2) Differentiate between heat pump, heat engine and refrigerator. (6)
b) Write two statements of second law of thermodynamics. (4)
6 a) Why Carnot cycle cannot be realized in practice? (3)
b) Show that entropy is a property. (4)

c) An inventor claims to have developed an efficient heat engine which would (3)
have a heat source at 1000°C and reject heat to a sink at 50°C and gives an
efficiency of 90%. Justify whether his claim is possible.

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