Question Paper: Power Plant Engineering : Question Paper May 2014 - Mechanical Engineering (Semester 7) | Mumbai University (MU)
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Power Plant Engineering - May 2014

Mechanical Engineering (Semester 7)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.


Write short notes on any four of the following

1 (a) Different types of traffic methods.(10 marks) 1 (b) Water hammering effects and its remedies(10 marks) 1 (c) Mechanical dust collectors(10 marks) 1 (d) Advantages of Fluidized Bed Combustion(10 marks) 1 (e) Classification of nuclear power plant(10 marks) 2 (a) What are the parameters to be considered in choosing a site for a coal fired thermal power plant(10 marks) 2 (b) Briefly discuss current energy scenario in Maharashtra. Answer should highlight power scenario in Mumbai.(10 marks) 3 (a) Describe the various methods of improving; the performance of a gas turbine power plant.(10 marks) 3 (b) From the following estimate the generating cost and also find if any reserve is available
Annual load factor - 60%
Capacity factor - 50% Installed capacity of the plant ~ 140 MW Capital cost of the plant - Rs. 200 × 106 Annual cost of coal, oil and salaries Rs. 20× 106
Rate of interest - 5%of capital
Rate of depreciation - 5% of capital.
(10 marks)
4 (a) (i) Explain in brief social and environmental effects of a hydro power plant(5 marks) 4 (a) (ii) Briefly explain different sub systems in D. G. Plant.(5 marks) 5 (a) A 2.4 hrs load duration curve on a small power plant is a straight line between 6 MW 10 and 2 MW respectively. The plant capacity is 7 MW. Find the plant load factor and plant capacity factor. If the power charges are Fis. 2.5 per kWh, find the charge to be paid per day.(10 marks) 5 (b) What are the different ways of ash disposal? Describe any one method in detail.(10 marks) 6 (a) State advantages of gas turbine plant over Diesel and thermal power plant(8 marks) 6 (b) The run off data of a river for 12 Months at a particular site is given below:

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Month Discharge millions of m3 per month Month Discharge millions of m3 per month
Jan 1500 July 3000
Feb 1200 Aug 3600
March 900 Sept 3000
April 600 Oct 2400
May 300 Nov 2100
June 2100 Dec 1800

Draw : (i) Hydrograph (ii) Flow duration curve (iii) mass curve. lf available water head at the site is 90 m, find power generated. Take Turbine efficiency 90%, generator efficiency 95% and 30 days in a month.(12 marks) 7 (a) Explain CANDU type nuclear reactor with neat sketch mentioning type of fuel and moderator.(10 marks) 7 (b) A residential consumer has the following connected load : Four tube lights of 40W each. Three Fans of 60 W each, Two night lamps of 15 W each and television of 100 W. Use of electricity during a day is as follows
12 midnight to 6 am. :2 Fans + 2 Night lamps
6 am. to 9 am. : 1 Fan + 1 Tube light
9 am. to 3 p. m. : Nil
3 pm. to 6 pm. : 3 Fans 7: Television
6 pin. to 9 pm. : 2 Fans + 4 Tube lights
9 pm. to 12 midnight 3 Fans + 2 Tube lights + Television.
Find : (a) Connects-:5 load (b) maximum demand (0) Demand factor.
(10 marks)

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