Power System - I (3140914) MCQs

MCQs of Conventional Generation, Load Curves and Tariffs

Showing 271 to 280 out of 425 Questions
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271.
Gas cooled reactor
(a) Uses CO2 or helium as coolant and graphite as the moderator
(b) Uses coolant at pressure of 14 - 28 kg/cm2 and at temperature of 700 - 800˚C
(c) Uses heavy water as coolant as well as moderator
(d) Both (a) and (b)
Answer:

Option (d)

272.
A sodium graphite reactor uses
(a) Sodium as moderator and graphite as coolant
(b) Sodium as coolant and graphite as moderator
(c) A mixture of odium and graphite as coolant
(d) A mixture of sodium and graphite as moderator
Answer:

Option (b)

273.
The most appropriate operating speeds in rpm of generators used in thermal, nuclear and hydro power plants would respectively be
(a) 3000, 300 and 1500
(b) 3000, 3000 and 300
(c) 1500, 1500 and 3000
(d) 1000, 900 and 750
Answer:

Option (b)

274.
The economic prospects of nuclear power generation in India to a great extent depends on successful development of
(a) Fast reactor using enriched uranium as the fuel thus avoiding import of heavy water
(b) Thermal reactors using natural uranium as the fuel and avoiding import of enriched uranium
(c) Breeder reactors using thorium as blanket material and U233 as the fuel
(d) Reactor using plutonium as the fuel, natural uranium as blanket and liquid sodium as the coolant
Answer:

Option (c)

275.
The gas turbine power plants have the advantages of
(a) Simplicity of design and installation, high reliability, compactness, clean exhaust and low initial cost
(b) Quick starting and capability of putting to share full load in few minutes
(c) High overall efficiency, low specific consumption and long life in comparison to that of steam power plants
(d) Both (a) and (b)
Answer:

Option (d)

276.
The main drawbacks of gas turbine power plants are
(a) Low overall efficiency, noisy operation and limited unit capacity
(b) Inability of using coal or heavy residual petroleum as fuels
(c) High initial cost, poor reliability and large space requirements
(d) Both (a) and (b)
Answer:

Option (d)

277.
A gas turbine works on
(a) Carnot cycle
(b) Brayton cycle
(c) Dual cycle
(d) Rankine cycle
Answer:

Option (b)

278.
Gas turbine is widely used in
(a) Locomotives
(b) Automobiles
(c) Aircraft
(d) Pumping stations
Answer:

Option (c)

279.
Gas turbine power plants are not widely used
(a) As peak load plants
(b) As standby power plants
(c) As base load plants
(d) In combination with steam power plants
Answer:

Option (c)

280.
In comparison to steam power plants, the gas power plants have
(a) Low initial cost but higher operating cost
(b) High initial cost but low operating cost
(c) Both initial as well operating costs high
(d) Both initial as well as operating costs low
Answer:

Option (a)

Showing 271 to 280 out of 425 Questions
25 26 27 28 29 30