# GTU previous question papers -BE- Sem-Vth -Power Plant Engineering -Dec 2010

GTU previous question papers

GUJARAT TECHNOLOGICAL UNIVERSITY

B.E. Sem-Vth Examination December 2010

Subject code: 151904

Subject Name: Power Plant Engineering

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Draw general lay of modern steam power plant label major component and state function of each component.

(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

(c) The hours during which the plant not in Service.

Q.2 (a) Explain the constructional difference between Low pressure and High

pressure boiler

(b) Explain with neat construction and working of sketch La Mont Boiler

OR

(b) Explain with neat sketch construction and working of Benson Boiler

Q.3 (a) Explain the traveling grate stoker with help of neat sketch

(b) What are the advantages and Disadvantages of Pulverized coal firing

OR

Q.3 (a) Explain the working of Electrostatic precipitator with neat sketch

(b) Classify various Ash handling system. Explain Pneumatic and steam jet ash

handling system

Q.4 (a) Classify Different types of Fan .Explain why are centrifugal backwardcurved

blading normally used for Forced Draft. Fan

(b) Compute the required motor capacity needed for F.D. Fan under following

condition:

Coal rate : 10 tonnes/h

Col analysis : C78.0 , H 3.0, O 3.0, S 1.0 ,

M 7.0, A 8.0

Excess air : 30 %

Plenum chamber pressure : 180 mm of water gauge

Mechanical Efficiency

of the Fan : 60%

Room temperature : 300 C

OR

Q.4 (a) Classify different types of cooling tower used in power plant. Explain

Natural draft cooling tower also explain the reason of its hyperbolic shape

(b) Exhaust steam having a quality of 0.9 enter a surface condenser at an

absolute pressure of 0.13 bar and comes outs as a water at 450 C. The

circulating water enters at 30 0 C and leaves at 400 C. Estimate quantity of

circulating water and condenser efficiency.

Q.5 (a) What are fission fragment and fission product? Explain Fission Reaction

with an example

(b) Explain with neat sketch Pressurizes water Reactor(PWR) Explain function

of pressurizer in PWR

OR

Q.5 (a) Explain with neat sketch arrangement of a Diesel power plant explain in

brief function of each system

(b) Explain with neat sketch construction and working of CANDU type reactor