Deck 3: Power Generation and Cogeneration Processes

Question 1

A plant producing both, electrical power & process heat simultaneously is?

A)cogenital plant
B)cogenerial plant
C)cogeneration plant
D)conglomerate plant

Answer 1

cogeneration plant

Question 2

In a back pressure turbine  

A)pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process
B)pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process
C)pressure at the exhaust from the turbine is the saturation pressure corresponding to the pressure desired in the process
D)none of the mentioned

Answer 2

pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process

Question 3

In a by-product power cycle?

A)the power is produced initially
B)power production is in the middle stages of the cycle
C)power production is after the cycle has ended
D)none of the mentioned

Answer 3

power production is after the cycle has ended

Question 4

In terms of cost per MW compared to condensing sets of the same power, the back pressure turbines are?

A)more expensive
B)cheaper
C)costly
D)none of the mentioned

Question 5

Which of the following is a good medium for constant temperature heating?

A)water
B)steam
C)coolant
D)diesel

Question 6

If e is the electricity fraction of the total energy output, m is the electric plant efficiency and n is the steam generator efficiency; the heat added per unit total energy output is given by?

A)(1 / m) + ((1 - e) / n).
B)(1 / n) + ((1 - e) / m).
C)(1 / m) + ((1 + e) / n)
D)(1 / n) + ((1 - e) / m)

Question 7

Which of these is not considered economical for cogeneration?

A)a high fraction of electric to total energy
B)a low fraction of electric to total energy
C)a low fraction of total energy to electric energy
D)none of the mentioned

Question 8

Which of these is a working fluid in the bottoming plant of a Brayton-Rankine combined plant?

A)mercury
B)steam
C)water
D)air

Question 9

What would be the temperature of the gas in the combustion chamber?

A)500 °c
B)1600 °c
C)1200 °c
D)650 °c

Question 10

What is regeneration?

A)removal of heat from compressed air between stages of compression
B)transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber
C)to increase the temperature of partially expanded gases by burning more fuel
D)transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber and increases the temperature of partially expanded gases by burning more fuel

Question 11

What is meant by inter cooling?

A)removal of heat from compressed air between stages of compression
B)transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber
C)to increase the temperature of partially expanded gases by burning more fuel
D)none of the mentioned

Question 12

What is the air standard cycle for a Gas- Turbine called?

A)reheat cycle
B)rankine cycle
C)brayton cycle
D)diesel cycle

Question 13

Power is produced when the working fluid does some work on the?

A)shaft
B)fins
C)blades
D)none of the mentioned

Question 14

A Gas Turbine is which type of combustion plant?

A)external
B)open
C)internal
D)cannot say

Question 15

Which type of compressor is used in a gas turbine plant?

A)reciprocating compressor
B)screw compressor
C)multistage axial flow compressor
D)either reciprocating compressor & screw compressor

Question 16

What part or % of power developed is utilised for driving the compressor?

A)65 %
B)70 %
C)55 %
D)80 %

Question 17

The gas turbine power plant mainly uses which among the following fuels?

A)coal and peat
B)kerosene oil and diesel oil and residual oil
C)gas oil
D)natural gas and liquid petroleum fuel

Question 18

The maximum steam temperature in a

A)600
B)500
C)300
D)100

Question 19

The temperature in a dry bottom pulverised coal furnace, in degree Celsius is about?

A)1200
B)1300
C)1400
D)2000

Question 20

What happens to the availability in a combined cycle plant?

A)decreases
B)increases
C)remains same
D)cannot say

Question 21

Which of the following is not a type of Combined Plant?

A)sodium- mercury-potassium plant
B)gas turbine-steam turbine plant
C)thermionic steam plant
D)thermoelectric steam plant

Question 22

Which of these is not a component of nuclear reactor?

A)reactor core
B)refractor
C)control rod
D)biological shield

Question 23

What efficiencies of thermionic power generator have been realised?

A)50-60%
B)40-50%
C)10-20%
D)30-40%

Question 24

In economics of nuclear power plant taxes and insurance charges are taken as  

A)operating cost
B)maintenance cost
C)capital cost
D)fixed cost

Question 25

PWR stands for  

A)power
B)partially weathered rock
C)pressurized water reactor
D)packaging waste regulations