Power System - I (3140914) MCQs

MCQs of Conventional Generation, Load Curves and Tariffs

Showing 71 to 80 out of 425 Questions
5 6 7 8 9 10
71.
Reheat cycle in a steam power station is employed for
(a) Improving thermal efficiency
(b) Improving condenser performance
(c) Reducing heat losses
(d) Utilizing heat of flue gases
Answer:

Option (a)

72.
In a regenerative cycle, feed water is heated by
(a) Heaters
(b) Drained steam from the turbine
(c) Exhaust gases
(d) All of above
Answer:

Option (b)

73.
In a regenerative feed heating cycle
(a) The optimum value of the fraction of steam extracted for feed water heating increases with the increase in rankine cycle efficiency
(b) The greatest economy is affected when steam is extracted from several places in different stages of the steam turbine
(c) Thermal efficiency is reduced
(d) Both (a) and (b)
Answer:

Option (d)

74.
The efficiency of the thermal power plant is of the order of
(a) 15%
(b) 30%
(c) 50%
(d) 60%
Answer:

Option (b)

75.
Which of the following contributes to the rankine efficiency improvement in a steam power plant ?
(a) Use of high pressure
(b) Reheat of steam at intermediate stages
(c) Use of steam for heating of boiler feed water
(d) All of above
Answer:

Option (d)

76.
The steam power plant efficiency can be improved by
(a) Using large quantity of water
(b) Burning large quantity of coal
(c) Using high pressure and high temperature steam
(d) Decreasing the load on the plant
Answer:

Option (c)

77.
The average load factor of thermal power plants in India is
(a) 100%
(b) 80 – 95 %
(c) 50 – 60 %
(d) 35 – 45 %
Answer:

Option (c)

78.
As the size of a thermal generating unit increases, the capital cost per kW of installed capacity
(a) Increases
(b) Decreases
(c) Remains same
(d) May increase or decrease
Answer:

Option (b)

79.
The modern trend in electric power generation is
(a) To have a large number of small size thermal plants located at different places
(b) To have large size thermal plants near load centers
(c) To have large size thermal plants located near coal fields
(d) None of above
Answer:

Option (c)

80.
In the feed water and steam circuit of a thermal power plant, the condensate flows from the condensate extraction pump to the boiler feed pump and then to the boiler. The HP and LP heaters are located in this circuit in relation to the boiler feed pump (BFP) as
(a) Both HP and LP heaters after BFP
(b) HP heater before and, LP heater after BFP
(c) Both HP and LP heaters before BFP
(d) LP heater before and, HP heater after BFP
Answer:

Option (d)

Showing 71 to 80 out of 425 Questions
5 6 7 8 9 10