Power Plant Engineering Mcq Pdf Download

101. The work ratio of closed cycle gas turbine power plant depends upon

(a) only on pressure ratio.
(b) temperature ratio of the cycle and specific heat ratio.
(c) pressure ratio, temperature ratio and specific heat ratio.
(d) pressure ratio and specific heat ratio.

102. Overall efficiency of gas turbine is

(a) less than that of diesel cycle.
(b) more than that of diesel cycle.
(c) more than that of otto cycle.
(d) equal to that of Rankine or Carnet cycle.

103. In comparison to diesel power plant the gas turbine power plant has

(a) lower overall thermal efficiency.
(b) higher overall thermal efficiency.
(c) the same overall thermal efficiency.
(d) unpredictable.

104. Mechanical efficiency of a gas turbine in comparison to that of reciprocating IC engine is

(a) lower.
(b) higher.
(c) the same.
(d) unpredictable.

105. Thermal efficiency of a gas turbine improves because of

(a) reheating of gas after partial expansion.
(b) removing the heat from compressed air between the stages of compression.
(c) utilizing the heat of exhaust gases to heat the compressed air before it is sent to combustion chamber.
(d) all of the above.

106. The thermal efficiency of a gas turbine cycle with ideal regenerative heat exchanger is

(a) less than work ratio.
(b) more than work ratio.
(c) equal to work ratio.
(d) unpredictable.

107. 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.

108. The combined cycle power plants are more appropriate for

(a) base loads.
(b) peak loads.
(c) intermediate loads.
(d) for both base and peak loads.

109. 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%

110. In a two stage gas turbine plant reheating after first stage

(a) improves thermal efficiency but reduces the work ratio.
(b) increases 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.

111. In a two stage gas turbine power plant inter-cooling 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 of the work ratio and thermal efficiency.
(d) reduces both of the work ratio and thermal efficiency.

112. A jet aircraft is powered by

(a) petrol engine.
(b) diesel engine.
(c) gas turbine.
(d) solar cells.
(e) batteries.

113. 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.

114. 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 the above.

115. Coal and peat is not generally used in gas turbines as fuel because of

(a) coal handling and ash handling problems.
(b) their higher costs.
(c) their non-availability.
(d) all of the above.

116. The gas turbine power plant can be used in combination with steam power plants by

(a) using exhaust gases from gas turbine power plant in heating of feed water coming from the steam turbine condenser.
(b) using exhaust gases from gas turbine power plant as combustion air in steam boiler.
(c) using gas from a supercharged boiler for expansion in gas turbine.
(d) any of the above.

117. In an MHD generator the conductor is made of

(a) copper or aluminum.
(b) liquid metal.
(c) gas.
(d) liquid metal or gas.

118. The nature of the current developed in MHD generator is

(a) ac.
(b) dc.
(c) either dc or ac.

119. Power output per unit volume of an MHD generator is proportional to

(a) specific electrical conductivity of gas.
(b) square of the magnetic field strength.
(c) square of the fluid velocity.
(d) all of the above.

120. Seeding material is injected into the working fluid, in MHD generator, in order to

(a) increase the conductivity of the gas.
(b) reduce the conductivity of the gas.
(c) reduce the temperature of the gas.
(d) none of the above.

• Power Plant Engineering MCQ Part – 1
• Power Plant Engineering MCQ Part – 2
• Power Plant Engineering MCQ Part – 3
• Power Plant Engineering MCQ Part – 4
• Power Plant Engineering MCQ Part – 5
• Power Plant Engineering Mcq Pdf
• Power Plant Engineering Mcq Pdf – 1
• Power Plant Engineering Mcq Pdf – 2

©yourelectricalguide.com/ power plant engineering mcq pdf download.