PTU B.Tech production 3rd Sem Paper 2012 Thermal Engineering

PTU B.Tech production 3rd Semester Paper 2012 Thermal Engineering Punjab Technical University Exam 2012 3rd Semester Thermal Engineering Test September and March Question Paper Free Download Punjab Technical University Thermal Engineering Question Papers 2012 PTU B.Tech production 3rd Sem Question Paper 2012 for all students Previous Year old Past Papers of PTU B.Tech production 3rd Semester Paper 2012 Thermal Engineering Punjab Technical University September 2012 and March 2012 Exam B.Tech production 3rd Semester Sample Model Question Papers Free Download PDF

Thermal Engineering

 a) In the characteristic gas equation, pV = mRT, what are the units of ‘p’?
b) Define first law of thermodynamics.
c) Write the formula for work done during a polytropic process.
d) A heat pump working on a reversed Carnot cycle has a COP of 5. If it works as a refrigerator taking 1 kW of work input, then what will its refrigeration effect?
e) A car possesses a four stroke cylinder-in-line diesel engine with compression ratio 21:1 and expression ratio 10.5:1, what will he its cut oH ratio’?
1) Draw a valve tinMning diagram for a tour stroke petrol engine.
g) Define ‘Degree of saturation’ and ‘relative humidity’.
h) Write down the properties ot’ k- 1 2 refrigerant.
I) Write the names of main boiler accessones.
j) In a power plant, turbine work = IO,00() kJ, pump work = 1 kJ. heat supplied by a boiler = 27OOO kJ. what will be the thermal efficiency of a plant’?

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