Power Plant Questions and Answers – Combined Cycle Plants, Nuclear and Thermionic Power Generation

This set of Power Plant Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Combined Cycle Plants, Nuclear and Thermionic Power Generation”.

1. The maximum steam temperature in a power cycle in degree centigrade is?
a) 600
b) 500
c) 300
d) 100
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2. The temperature in a dry bottom pulverised coal furnace, in degree Celsius is about?
a) 1200
b) 1300
c) 1400
d) 2000
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3. What happens to the availability in a combined cycle plant?
a) decreases
b) increases
c) remains same
d) cannot say
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4. By superposing a high temperature power plant as a topping unit to the steam plant, the energy conversion efficiency achieved is?
a) higher
b) lower
c) maximum
d) minimum
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5. Which of the following is not a type of Combined Plant?
a) Sodium- mercury-Potassium plant
b) Gas turbine-Steam turbine plant
c) Thermionic steam plant
d) Thermoelectric steam plant
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6. Which of these is not a component of nuclear reactor?
a) reactor core
b) refractor
c) control rod
d) biological shield
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7. Which of these is not a merit of nuclear power?
a) amount of fuel required is small
b) plant requires a huge amount of area
c) demand for coal and oil is reduced
d) most economical in large quantities
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8. The thermionic generator is essentially which kind of device?
a) low voltage & high current
b) high voltage & high current
c) low voltage & low current
d) high voltage and high current
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9. What efficiencies of thermionic power generator have been realised?
a) 50-60%
b) 40-50%
c) 10-20%
d) 30-40%
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10. The maximum electron current per unit area provided by an emitter is given by (where J = current density, T = absolute temperature in K, ɸ = work function in keV, k = Boltzmann’s constant & A=emission constant)
a) J = AT exp(-ɸ/kT)
b) J = AT (-ɸ/kT)
c) J = AT2 exp(-ɸ/kT)
d) J = exp(-Aɸ/kT2)
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11. In an electron beam, the average kinetic energy of an electron is given by __________
a) 2KT
b) 3KT
c) 1.5KT
d) 2.5KT
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Sanfoundry Global Education & Learning Series – Power Plant Engineering.

To practice all areas of Power Plant Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.