Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 5th Sem Old 151904 Power Plant Engineering Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? V(OLD) EXAMINATION ? SUMMER 2019
Subject Code:151904 Date:20/06/2019
Subject Name:Power Plant Engineering
Time:02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Draw general layout of modern thermal power plant and label major components. Explain its
main four circuits in brief.
07
(b) Draw a neat sketch of Velox boiler. What are its advantages over conventional high
pressure boilers?
07
Q.2 (a) What are the advantages and Disadvantages of Pulverized coal firing. 07
(b) Explain the constructional difference between Low pressure and High pressure boiler. 07
OR
(b) Explain the working of Electrostatic precipitator with neat sketch. 07
Q.3 (a) Compare mechanical draught cooling tower with natural cooling tower. 07
(b) Explain with neat sketch Diesel power plant. Explain function of each system in brief. 07
OR
Q.3 (a) Explain working of PWR reactor with neat sketch. 07
(b) A Power plant has following annul factor:
Load factor = 0.75 Capacity factor = 0.60 Maximum demand is = 60 MW
Estimate : (a) The annual Energy production
(b) The reserve capacity over and above the peak Load
(c) The hours during which the plant not in Service
07
Q.4 (a) How steam power plant pollute air? What are the effects of this pollution on human health? 07
(b) Exhaust steam having a quality of 0.95 enter a surface condenser at an absolute pressure of 0.14
bar and comes outs as a water at 45
0
C. The circulating water enters at 30
0
C and leaves at 40
0
C.
Estimate quantity of circulating water and condenser efficiency.
07
OR
Q.4 (a) Explain in detail sodium zeolite water treatment with neat sketch .
07
(b) The peak load on a 52 MW power station is 40 MW. It supplies power through four transformers
whose connected loads are 17, 12, 9 and 10 MW. The maximum demands on these transformers
are 15, 10, 8, and 9 MW respectively. if the annual load factor is 52% and plant is operating for
63% of the period in a year, find out the following: (i) Average load on the station (ii) Energy
supplied per year (iii) Demand factor (iv) Diversity factor (v) Power Station use load.
07
Q.5 (a) Derive expression for chimney height in terms of air and flue gas temperature and air-fuel
ratio.
07
(b) Explain working of two pass flow surface condenser with neat sketch 07
OR
Q.5 (a) Classify the diesel engine lubrication system. Explain any one with neat sketch. 07
(b) A draught of 20mm of water column each produce in 33m high chimney. The air and flue gas
temperatures are 310K and 670K. Coal used is 2500Kg/hour. Find (1) quantity of air supplied per
Kg of coal (2) The draught in terms of column of hot gases.
07
*************
FirstRanker.com - FirstRanker's Choice
This post was last modified on 20 February 2020