Question 1

In practice what is the value of diversity factor?

Accepted Answer

A)  less than unity
B)  geater than unity
C)  equal to or greater than unity
D)  less than zero B

Question 2

A simple Rankine cycle produces 40 MW of power, 50 MW of process heat and rejects 60 MW of heat to the surroundings. What is the utilization factor of this co generation cycle neglecting the pump work?

Accepted Answer

A)  50
B)  60
C)  70
D)  80 B

Question 3

Can vacated coal mines be used for waste disposal.

Accepted Answer

A) True 
 B)False  True

Question 4

Which of the following contributes to the improvement of efficiency of Rankine cycle in a Thermal Power Plant?

Accepted Answer

A)  reheating of steam at intermediate stage
B)  regeneration use of steam for heating boiler feed water
C)  use of high pressures
D)  all of the mentioned

Question 5

Rankine cycle efficiency of a good Steam Power Plant may be in the range of?

Accepted Answer

A)  15 to 20%
B)  35 to 45%
C)  70 to 80%
D)  90 to 95%

Question 6

During which time the demand of electrical energy is maximum?

Accepted Answer

A)  2 a.m. to 5 a.m.
B)  5 a.m. to 12 p.m.
C)  12 p.m. to 7 p.m.
D)  7 p.m. to 9 p.m

Question 7

Absorption of radioactive element by human, affects their offspring's.

Accepted Answer

A) True 
 B)False

Question 8

What is the advantage of having smaller ratio of water to steam space?

Accepted Answer

A)  steam can be generated at a faster even if the boiler is cold
B)  increases the rate of evaporation
C)  water is made cyclic, i.e., from boiler drum to water tube and back to drum
D)  helps in mobilizing the boiler

Question 9

Which of the following is called as cold reserve?

Accepted Answer

A)  reserve capacity available but not ready for use
B)  reserve capacity available and ready for use
C)  generating capacity connected to bus and ready to take load
D)  capacity in service in excess of peak load

Question 10

Tailings forms are the residues from

Accepted Answer

A)  uranium
B)  thorium
C)  cadmium
D)  boron

Question 11

What are released into biosphere from nuclear power plants?

Accepted Answer

A)  gaseous effluents
B)  waste product
C)  smoke
D)  the obtained product

Question 12

LLW stands for

Accepted Answer

A)  low level water
B)  low laser width
C)  low level waste
D)  loss of levels in water

Question 13

What is the actual turbine inlet temperature in Rankine cycle?

Accepted Answer

A)  700°c
B)  800°c
C)  550°c
D)  1150°c

Question 14

How are moderate active solid wastes disposed?

Accepted Answer

A)  buried underground
B)  buried under sea
C)  sent to outer space
D)  left out in streams or rivers

Question 15

How is High Level solidified nuclear wastes (HLW) stored?

Accepted Answer

A)  concrete tanks
B)  canisters
C)  packed rock salt
D)  soil bins

Question 16

Which type of boilers use orifice to control the flow circulation?

Accepted Answer

A)  natural circulation boilers
B)  forced convection boilers
C)  once-through boilers
D)  positive forced circulation boilers

Question 17

The load factor is

Accepted Answer

A)  always less than unity
B)  less than or greater than 1
C)  always greater than 1
D)  less than zero

Question 18

Load duration curve indicates

Accepted Answer

A)  the variation of load during different hours of the day
B)  total number of units generated for the given demand
C)  total energy consumed by the load
D)  the number of hours for which the particular load lasts during a day

Question 19

Size and cost of installation depends upon

Accepted Answer

A)  average load
B)  maximum demand
C)  square mean load
D)  square of peak load

Question 20

What is the unit of Heat rate?

Accepted Answer

A)  kj/kw
B)  kw/kj
C)  kj
D)  kw

Exam 6: Electrical Energy and Power Plants