Power System - I (3140914) MCQs

MCQs of Conventional Generation, Load Curves and Tariffs

Showing 301 to 310 out of 425 Questions
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301.
In a gas turbine power plant, a regenerator increases the
(a) Pressure ratio
(b) Work output
(c) Thermal efficiency
(d) Fuel consumption of the plant
Answer:

Option (c)

302.
The thermal efficiency of a gas turbine cycle with ideal regenerative heat exchange is
(a) Less than work ratio
(b) More than work ratio
(c) Equal to work ratio
(d) Unpredictable
Answer:

Option (c)

303.
With the increase in pressure ratio thermal efficiency of a simple gas turbine power plant with fixed turbine inlet temperature
(a) Increases
(b) Reduces
(c) First increases and then falls
(d) First falls and then increases
Answer:

Option (c)

304.
The combines cycle power plants are more appropriate for
(a) Base loads
(b) Peak loads
(c) Intermediate loads
(d) For both base and peak loads
Answer:

Option (c)

305.
The combined cycle power plants are more appropriate for capacity factors of
(a) Less than 20%
(b) 20 to 50%
(c) 50 to 70%
(d) 100%
Answer:

Option (b)

306.
In a two stages gas turbine plant reheating after first stage
(a) Improves thermal efficiency but reduces the work ratio
(b) Increase work ratio but reduces thermal efficiency
(c) Reduces both of the work ratio and thermal efficiency
(d) Increases both of the work ratio and thermal efficiency
Answer:

Option (b)

307.
In a two stage gas turbine power plant intercooling and reheating
(a) Improves the work ratio but reduces the thermal efficiency
(b) Reduces the work ratio but improves the thermal efficiency
(c) Improves both the work ratio and thermal efficiency
(d) Reduces both the work ratio and thermal efficiency
Answer:

Option (a)

308.
A jet aircraft is powered by
(a) Petrol engine
(b) Diesel engine
(c) Gas turbine
(d) Solar cells
Answer:

Option (c)

309.
For a jet propulsion unit, ideally the work of compressor and that of gas turbine are
(a) Different
(b) Equal
(c) Not related to each other
(d) Unpredictable
Answer:

Option (b)

310.
In a closed cycle operation of gas turbines
(a) Load variation is affected by controlling the absolute pressure and the mass flow of the circulating air
(b) High efficiency is maintained over the complete range of operating loads
(c) Maximum unit capacity is increased
(d) All of above
Answer:

Option (d)

Showing 301 to 310 out of 425 Questions
28 29 30 31 32 33