Diploma Thermal Engineering 2 Question papers

Unit 1 Formation and Properties of Steam & Thermodynamic Processes of Vapour
Steam – Properties – formation of steam– saturation temperature – enthalpy of water – enthalpy of evaporation – conditions of
steam – wet, dry and superheated steam – dryness fraction – enthalpy of wet, dry and superheated steam – advantages of superheated steam – Property diagrams – p-v diagram – T-H Formation and Properties of Steam & Thermodynamic Processes of Vapour Steam – Properties – formation of steam– saturation temperature – enthalpy of water – enthalpy of evaporation – conditions of steam – wet, dry and superheated steam – dryness fraction –
enthalpy of wet, dry and superheated steam – advantages of superheated steam – Property diagrams – p-v diagram – T-H

Unit 2 Steam Boilers And Performance Of Boilers
Introduction -Classification of boilers – comparison of fire tube and water tube boilers– high pressure boilers – advantages of high pressure boilers – BHEL high pressure boilers – boiler mountings
and function- construction and working – boiler accessories and function – construction and working – comparison of mountings and accessories – feed water treatment – internal and external
treatments – starting boiler from cold condition – safety precautions in boiler operation – clauses of Indian boiler act.
Evaporation rate – actual, equivalent and factor of evaporation – boiler efficiency – factors influencing boiler efficiency – boiler
power – problems – boiler plant – efficiency of economizer and super heater – problems – boiler trial – heat losses in a boilerheat balance sheet – problems.

Diploma Thermal Engineering 2 Question papers

Unit 3 Thermal Power Plant And Steam Turbines and condensers
Selection of site for thermal power plant -Layout of thermal power plant – fuel and ash circuit – water and steam circuit – air and flue gas circuit – cooling water circuit – merits and demerits of thermal power plant –– air pollution by thermal power plants – pollutants, effects and control – cyclone separator – wet scrubber – electrostatic precipitator – control of No2 and SO2.fiudised bed combustion- thermal and noise pollution. Basic steam power cycles – Carnot, Rankine and modified Rankine cycles. Classification of steam turbine-Impulse and reaction turbines- Difference – necessity of compounding –
Methods of compounding – special turbines. Steam condensers – elements of condensing plant – classification
of condensers – jet condenser – surface condensers – Comparison of jet and surface condensers – sources of air in condenser – condenser vacuum – vacuum efficiency – condenser efficiency – mass of cooling water required – mass of air present – number of tubes – simple problems.

Unit 4 Conventional Sources Of Energy And Nuclear Power Plant
Conventional sources of energy – layout of hydel and diesel power plants – merits and demerits. Nuclear fuels –fissile and fertile fuels – Nuclear fission and fusion – chain reaction – radio activity – layout of nuclear power plant – merits and demerits – Nuclear reactors -Components–Reactor
Core -moderators – control rods – coolant – reflectors – biological shield-Reactor Vessels-Classification of Reactor- pressurized water reactor – boiling water reactor – Candu type reactor – fast
breeder reactor –– effect of nuclear radiation – Fuel Cycle –Site selection – Safety-Floating Nuclear Power Plants-Uranium Enrichment – Methods-disposal of nuclear wastes- comparison of nuclear power plants with thermal power plants- Nuclear Power Plant in India.

Unit 5 Air Compressors And Gas Turbines
Air Compressors-uses of compressed air – classifications of Air compressor – reciprocating compressor – single stage
reciprocating compressor – compression processes – power required to drive the compressor ( Neglecting clearance Volume)
– clearance volume and its effects volumetric efficiency –power
required to drive the compressor with clearance volume – problems – multi stage compression – merits and demerits – work
input – ratio of cylinder diameters for minimum work input.
Rotary compressors – Roots blower – vane blowers – centrifugal and axial flow air compressors.
Gas turbines – uses – classifications – merits and demerits of gas turbines -constant pressure combustion gas turbine – gas turbine with – intercooler –reheater – regenerator -effects – closed cycle
gas turbines – merits and demerits of open and closed cycle gas
turbines
Jet propulsion -turbojet engines– merits and demerits – turbo propeller engines – merits and demerits – ramjet – merits and demerits – Rocket engines – solid propellant rocket -applications of rockets.