Power Plant Auxiliaries & Drive B.E Question Paper : jaduniv.edu.in
Name of the University : Jadavpur University
Department : Power Engineering
Degree : B.E
Subject Name : Power Plant Auxiliaries & Drive
Sem : II
Website : jaduniv.edu.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/dspace.jdvu.ac.in/5520-Power%20Plant%20Auxiliaries%20and%20Drive.pdf
Power Plant Auxiliaries And Drive Question Paper :
B. Power Engg. Final Examination, 2008 :
(1st Semester)
Time : Three hours
Full Marks : 100 (50 marks each part)
Use a separate Answer-Script for each part.
Related : Jadavpur University Power Plant Operation & Maintenance-II B.E Question Paper : www.pdfquestion.in/5518.html
PART–I :
Answer Question No. 1 and any two from the rest. :
1. a) Explain, the importance of recirculation of a B.F.P. Determine, the temperature raise in a B.F.P. of Power consumption 4 MW, discharge of 400 T/hr, and efficiency of 70%. 6
b) How, the equilibrium of forces are maintained between the follow plilot valve and speed governor and the same are hydraulically coupled. 6
c) Explain with diagram the importance of vacuum equalizer between condenser and C.E.P well. 6
2. a) Range of a C.W. system is 8°C , Vacuum maintained in condenser is 0.074 bar (hfg – 2407 KJ/kg), Steam consumption for 200 M.W. generation is 700 T/hr, leaving steam with 12% moisture. Determine the discharge capacity of each of the C.W. pumps, designed to run 3 pumps at 200 M.W. generation. 8
b) Explain with diagram, the range, approach, and cooling efficiency of a C.W. system 8
3. a) What are the principals of deaeration. Draw and explain the function of a deaerator with Vent condenser. 8
b) Explain, the necessity of providing C.E.P. Recirculation after main ejector and G.S.C–I. 8
4. a) In a B.F.P., how axial thrust develops and the same is almost balanced in B.C.H. Explain with diagram. 8
b) What are the different zones of heat transfer in an indirect feed heater ? Why T.T.D. approaches negative with the increase of desuper heating zone ? Explain with diagram. 8
5. Write short notes on (any four ) : 4×4=16
(a) N.P.S.H.
(b) Sub-Cooling
(c) Drip Pump
(d) Drift loss
(e) Warming up of B.F.P.
(f) Necessity of loops in Main ejector
PART–II :
Answer any three questions. :
Two marks reserved for neat sketch. :
6. a) What are different forms of ash usually found in pulvesized fuel fired boiler. 2
b) Name different system of extraction of ash usually provided in different power stations. 3
c) Describe the system of intermittent extraction of bottom ash of a large coal fired boiler. 8
d) Describe starting sequence of above system. 3
7. a) What are the main sources of water of Indian power station ? 2
b) State how natural water gets contaminated. Name water impurities and also how quantity of impurities are reported. 4
c) What is the desirable input water quality of a DM plant ?
d) Describe how raw water is converted into DM input quality water. 8
8. a) What are soot blowers ? 2
b) What are essential parts of a typical soot blower. 4
c) State with short description different types of soot blowers used for cleaning different section of boiler surface. 6
d) Describe the operating sequence of a soot blowing system. 4
9. a) Why is flame scanner essential for boiler safety. 2
b) Explain problems of scanning of coal flame. How these problems have been sorted out ? 6
c) Describe flame scanning system with neat sketch. 8
10. Write short notes on : 4×4
a) Impact mills
b) Mechanical Dust collector
c) Axial flow fan
d) Mechanical atomiser.
Power Plant Cycles & Systems Syllabus :
Properties of ideal working fluid for vapor power cycles. Practical losses in Rankine and Reheat cycles. Practical Regenerative cycles with open and closed feed water heaters, choice of heaters, heater arrangements and optimum degree of regeneration. Supercritical pressure cycle. Heat Balance Diagram and its utility. First and Second Law analyses of practical vapor power cycles.
Effects of operating parameters on plant performance. Gas turbine cycles with intercooling, reheating and regeneration. Combined Cycles: Definition and classification, simple thermodynamic analyses of coupled cycles. Binary vapor power cycle, Gas Turbine Combined Cycle, STIG, IGCC, Cogeneration, CHP applications Layout of a thermal power plant.
Familiarization with different systems of thermal power plant: fuel, air and flue gas systems, Condensate and feedwater system, Construction and functioning of condenser, deaerator and closed feed water heaters, HP – LP By-pass systems, Auxiliary Steam System, Turbine gland steam system. CW system. Cooling Towers— principle of operation and types, performance of cooling towers.