Hall Ticket No Question Paper Code: AME003
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
B.Tech IV Semester End Examinations (Supplementary) June, 2018
Regulation: IARE R16
THERMODYNAMICS
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Define intensive and extensive properties.
Define specific heat capacity at constant volume and specific heat at constant pressure.
2. What is open system, closed system and isolated system.
A System contains 0.15M3 of air at a pressure of 3.8bar and 1500c. It is expanded adiabatically
till the pressure falls to 1 bar. The gas is then heated at a constant pressure till its enthalpy
increases by 70KJ. Determine the total work done.
UNIT II
3. Define the change in internal energy of a system
Explain the principle of entropy increase.
4. Explain Kelvin Planck and clausius statement of second law with neat sketch.
Sketch the PV and TS diagrams of Carnot cycle
UNIT III
5. What is critical state? Explain the terms critical pressure, critical temperature and critical
volume of water.
A reversible engine operates between a source at 927º C and two sinks at 127º C and 27º C. The
energy reflected at both the sinks is the same compute the engine efficiency. Define the following,
Dry bulb temperature
ii) Wet bulb temperature
iii)Dew point temperature
iv)Specific humidity
6. Derive the Clausius Claperon equation
Platinum wire is used as a resistance thermometer. The wire resistance was found to be 10 ohm
and 16 ohm at ice point and steam point respectively, and 30 ohm at sulphur boiling point of
444.6°C. Find the resistance of the wire at 500°C,if the resistance varies with temperature by the
relation.
UNIT IV
7. Derive Dalton's law of partial pressures for mixture of gases.
Define mole fraction? Explain about volumetric and gravimetric analysis
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8. Define bypass factors. Represent adiabatic mixing of two air streams on psychrometric chart?

Derive specific heats and internal energy of an ideal gas .
UNIT V
9. Compare the Otto, Diesel and dual cycles for same constant compression ratio, Constant Maximum
pressure and same heat input.
Write the processes involved in Brayton cycle with the help of PV diagram.
10. Define compression ratio. What is its range for SI engines and CI engines? What Factors limit
the compression ratio in each type of engine
What is the difference between Otto and Diesel cycle? Show that the efficiency of Diesel cycle is
always lower than the efficiency of the Otto cycle for the same compression ratio .