MS6502 Applied Thermodynamics
Third year, Department of Mechanical Sandwich Engineering
First and second Units Questions.
Answer ALL questions
PART A – (10×2=20 marks)
1. Define Density and Specific weight.
2. Define atmospheric pressure and gauge pressure.
3. Classification of thermodynamic system.
4. Define surrounding ?
5. Define cycle ?
6. Explain Zeroth law of thermodynamics
7. Explain First  law of thermodynamics
8. When a system is said to be in Thermodynamics Equilibrium.
9. Explain Free Expansion process.
10. Define Kinetic energy.

PART B – (5x16=80 marks)
11) Derive an expression for the value of polytropic process.
12) 5 kg of air at 400C and 1 bar is heated in a reversible non-flow constant pressure until the this volume is double. Find (1) change in volume (2) work done (3) change in internal energy    (4)change in enthalpy.
13)  0.25 Kg of a air pressure of 1 bar occupy the volume of  0.3 m3.If this a expand Ios thermally. To a volume of 0.9m3. Find the (i) The initial temperature (ii) Final temperature         
(iii) external work (iv) heat observer by the air (v) change in internal energy.                            Assume R=0.29 KJ/Kg.K
14) A gas of mass 0.35Kg pressure 1535 KN/m2 and temperature of 3350C is expand adiabatically to a pressure of 126 KN/m2. The gas is then heat at a constant volume. Until its reach 3350 c, when it pressure isfound to be 275kn/m2, finaly the gas is compressed isothermally, until the original pressure 1535kn/m2 obtained. Draw the p,v  diagram and find out the following
(i) The valve of adiabetic index
(ii) Change in internal energy during adiabetic process
(iii) Heat transfer , During constant valume process
                        Take cp=1.005KJ/Kg.k
15) A steam turbine operates under steady flow condition. If received steam 7200Kg/hr from the boiler. The steam enter the turbine at enthalpy of 2800KJ/Kg a velocity of 400m/min and an evalvation 4m. The steam leaves the turbine at the enthalpy of 200KJ/Kg . A velocity of 8000m/min and an evalvation 1m. Due to radiation the amount of heat loss from the turbine to the surrounding is 1500KJ/hr. Calculate the power output of the turbine.