MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Power Plant knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In an electron beam, the average kinetic energy of an electron is given by __________ |
| A. | 2KT |
| B. | 3KT |
| C. | 1.5KT |
| D. | 2.5KT |
| Answer» B. 3KT | |
| 2. |
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) |
| Answer» D. J = exp(-Aɸ/kT2) | |
| 3. |
WHAT_EFFICIENCIES_OF_THERMIONIC_POWER_GENERATOR_HAVE_BEEN_REALISED??$ |
| A. | 50-60% |
| B. | 40-50% |
| C. | 10-20% |
| D. | 30-40% |
| Answer» D. 30-40% | |
| 4. |
In an electron beam, the average kinetic energy of an electron is given by$ |
| A. | 2KT |
| B. | 3KT |
| C. | 1.5KT |
| D. | 2.5KT |
| Answer» B. 3KT | |
| 5. |
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(-…∏/kT) |
| B. | J= AT (-…∏/kT) |
| C. | J= AT2 exp(-…∏/kT) |
| D. | J= exp(-A…∏/kT2) |
| Answer» D. J= exp(-A‚Äö√Ѭ∂‚Äö√†√®/kT2) | |
| 6. |
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 |
| Answer» B. high voltage & high current | |
| 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 |
| Answer» C. demand for coal and oil is reduced | |
| 8. |
Which of these is not a component of nuclear reactor? |
| A. | reactor core |
| B. | refractor |
| C. | control rod |
| D. | biological shield |
| Answer» C. control rod | |
| 9. |
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 |
| Answer» B. Gas turbine-Steam turbine plant | |
| 10. |
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 |
| Answer» B. lower | |
| 11. |
What happens to the availability in a combined cycle plant? |
| A. | decreases |
| B. | increases |
| C. | remains same |
| D. | cannot say |
| Answer» B. increases | |
| 12. |
The temperature in a dry bottom pulverised coal furnace, in degree Celsius is about? |
| A. | 1200 |
| B. | 1300 |
| C. | 1400 |
| D. | 2000 |
| Answer» C. 1400 | |
| 13. |
The maximum steam temperature in a power cycle in degree centigrade is? |
| A. | 600 |
| B. | 500 |
| C. | 300 |
| D. | 100 |
| Answer» B. 500 | |