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Tuesday, August 30, 2016



S.B. Roll. No. __________

THERMODYNAMICS-I
4th Exam/Mech/5367/2253/Dec-2011
Duration: 3 Hrs
Section-A
Q1. Fill in the blanks
(i) ___________ property of the system depends upon the mass of the system.
(ii) The __________ of a substance is the space occupied by it.
(iii) The gas law apply to _________ gases only.
(iv) The work done in constant volume process is ___________
(v) The first law of thermo dynamics forms the basis for the measurement of __________
(vi) Second law of thermodynamics helps to form the basis of _____________
(vii) An ideal or a perfect gas does not obey the gas laws.(T/F)
(viii) During addition of patent heat temperature of the substance remain ___________
(ix) Dryness fraction of super heated stem can never be less than one (T/F)
(x) __________ water is used for the boiler.
(xi) Otto cycle is used for diesel engine (T/F)
(xii) Air cooler is provided in the ___________ stage compression.
(xiii) Radiation is a mode of heat transfer (T/F)
(xiv) Walls of several heterogeneous layers is called ___________
(xv) Kalvin-planks law deal with conservator of heat (T/F)

Section-B
Q2. Attempt any six question
(1) What do you mean by thermodynamics?
(2) 2m2
of a gas at 300C receives heat at constant pressure so that the final temperature is 2100C. Find out final volume & increase in volume during the process.
(3) Explain Isentropic Process.
(4) A boiler produces 800kg of steam per hour from feed water at 50°C. Assuming the boiler to be steady flow system neglecting potential energy changes. Find the rate at which heat is transferred. Assuming enthalpy of steam is 2800 kj/kg.
(5) Define real gases.
(6) What are the advantages of super heating steam?
(7) Write the comparison of fine tube and water tube boiler.
(8) What do you mean by multistage compressor.

Section-C

Q3. Attempt any two of the following

(i) Explain the following
(a) Fourier law
(b) Thermal radiation
(c) Steady state condition
(ii) In a flow process the internal energy of a gas decreases by 200kj/kg of gas and flow work increases by 4800kj per kg of the gas. Find the change in specific enthalpy and also in total enthalpy of the gas.

 (iii) Explain the following
(a) Latent heat of vaporization
(b) Dryness fraction(x)
(c) Total heat of wet steam










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