D C1133 Pages 2

Reg No.:_. Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION(S), MAY 2019
Course Code: ME205

Course Name: THERMODYNAMICS
(Steam Tables allowed)

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any three full questions, each carries 10marks. Marks
1 8) Explain microscopic and macroscopic view points (3)
b) Distinguish between change of state, path and process (3)
c) How will you define density and pressure using the concept of continuum? (4)
2 a) Explain constant volume gas thermometer with a neat diagram (3)
b) Why does free expansion have zero work transfer? (3)
c) Define internal energy. Show that energy a property of a system (4)
3 9) Define specific heat and derive it for constant volume and at constant pressure (4)

b) A gas of 4 kg is contained within the piston cylinder machine. The gas undergoes (6)
a process for which ‏۷۱۵م‎ = Constant. The initial pressure is 3 bar and the initial
volume is 0.1m, and the final volume is 0.22. The specific internal energy of
the gas decreases by 4.6kJ/kg. There is no significant change in KE and PE.
Determine net heat transfer for the process.
4 a) How can you relate S.F.E.E with Euler and Bernoulli Equations? (5)
b) A pump steadily delivers water at a volumetric flow rate of 0.05m7/s through a (5)
pipe of diameter 18 cm located 100 m above the inlet pipe which has a diameter
of 15 cm. The pressure is nearly equal to | bar at both the inlet and the exit, and
the temperature is nearly constant at 20°C throughout. Determine the power
required by the pump. Take ‏دع‎ 9.81 m/s”
PART B
Answer any three full questions, each carries10marks.
5 ച Establish the equivalence of Kelvin — Plank and Clausius statement (5)
b) A heat pump working on the Carnot cycle takes in heat from ೩ reservoir at5°C (5)
and deliver heat to a reservoir at 60°C. The heat pump is driven by a reversible
heat engine which takes in heat from a reservoir at 840°C and rejects heat to a
reservoir at 60°C. The reversible heat engine also drives a machine that absorbs

30kW. If the heat pump extracts 17kJ/s from 5°C reservoir. Determine (a) rate of

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