MCQOPTIONS
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MCQOPTIONS
This section includes 180 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the approx cost of disposing nuclear waste into sea per cubic meter? |
| A. | 50 rs |
| B. | 300 rs |
| C. | 500 rs |
| D. | 1000 rs |
| Answer» C. 500 rs | |
| 2. |
What are the ways in which most of radio activeness is removed? |
| A. | infusing them with other metal |
| B. | neutralizing them by diluting in chemical solutions |
| C. | storing them |
| D. | segregating them into small packs |
| Answer» D. segregating them into small packs | |
| 3. |
Which type of disposal of nuclear waste is cheapest and easiest method of all? |
| A. | ground |
| B. | air |
| C. | space |
| D. | water |
| Answer» B. air | |
| 4. |
A 400 MW nuclear power station would produce a equivalent radium of |
| A. | 100 tons daily |
| B. | 1000 tons daily |
| C. | 500 tons daily |
| D. | 10 tons daily |
| Answer» B. 1000 tons daily | |
| 5. |
Which of the following represents the annual average load? |
| A. | (kwh supplied in a day)/24 |
| B. | {(kwh supplied in a day)/ 24 } × 365 |
| C. | {(kwh supplied in a month)/(30 x 24) |
| D. | (kwh supplied in a year) / (24 × 365) |
| Answer» E. | |
| 6. |
What is the advantage of sectionalizing of power plant? |
| A. | high reliability |
| B. | low capital cost |
| C. | low maintenance |
| D. | easy operation |
| Answer» B. low capital cost | |
| 7. |
How many kinds of Geo thermal steams are there? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 8. |
Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon? |
| A. | valves and gates |
| B. | draft tubes |
| C. | spillway |
| D. | surge tank |
| Answer» E. | |
| 9. |
Which is the main source of nuclear radiations? |
| A. | nuclear power plant |
| B. | sunlight |
| C. | atmospheric air |
| D. | volcanoes |
| Answer» B. sunlight | |
| 10. |
How many percentage of fissionable U-235 occurring in uranium? |
| A. | 0.1% |
| B. | 0.5% |
| C. | 0.7% |
| D. | 1.5% |
| Answer» D. 1.5% | |
| 11. |
Who made the famous “Atoms for Peace†speech? |
| A. | abraham lincoln |
| B. | jawaharlal nehru |
| C. | dwight d eisenhower |
| D. | parker chewier |
| Answer» D. parker chewier | |
| 12. |
Where was the first use of nuclear bombs which cause death to the millions of lives? |
| A. | karachi |
| B. | melbourne and sydney |
| C. | hiroshima and nagasaki |
| D. | tokyo |
| Answer» D. tokyo | |
| 13. |
Which is the most commonly used molten metal for cooling of nuclear reactors? |
| A. | zinc |
| B. | sulphur |
| C. | sodium |
| D. | manganese |
| Answer» D. manganese | |
| 14. |
The mass number of an element is not changed, when it emits                      radiations. |
| A. | α & γ |
| B. | α, β, & γ |
| C. | α & β |
| D. | β & γ |
| Answer» E. | |
| 15. |
In which of the Following reactor is heavy hydrogen isotope H-2 is used as moderator? |
| A. | boiling water reactor |
| B. | pressurized water reactor |
| C. | candu reactor |
| D. | thermal reactor |
| Answer» D. thermal reactor | |
| 16. |
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 | |
| 17. |
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 | |
| 18. |
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 | |
| 19. |
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 | |
| 20. |
The maximum steam temperature in a power cycle in degree centigrade is? |
| A. | 600 |
| B. | 500 |
| C. | 300 |
| D. | 100 |
| Answer» B. 500 | |
| 21. |
Which among these is the main component of a gas turbine plant? |
| A. | condenser |
| B. | compressor |
| C. | boiler |
| D. | both compressor & boiler |
| Answer» C. boiler | |
| 22. |
Which material is used for the manufacture of the turbine blades? |
| A. | stainless steel |
| B. | carbon steel |
| C. | high nickel alloy |
| D. | high alloy steel |
| Answer» D. high alloy steel | |
| 23. |
Which of the following is a type of Gas Turbine Plant? |
| A. | single acting |
| B. | double acting |
| C. | open |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 24. |
To improve the efficiency of the gas turbines, which among these are used? |
| A. | regenerator |
| B. | inter cooling |
| C. | reheating |
| D. | all of the mentioned |
| Answer» E. | |
| 25. |
Which of these is a working fluid in the topping plant of a Brayton-Rankine combined plant? |
| A. | hydrogen |
| B. | helium |
| C. | nitrogen |
| D. | all of the mentioned |
| Answer» C. nitrogen | |
| 26. |
Heat treatment arrangement used to separate or remove deserved gases and impurities from feed water is called the year later. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 27. |
Which of the following is not a reason of heating feed water? |
| A. | it improves overall efficiency |
| B. | it removes dissolved impurities |
| C. | it prevents from thermal stress which may cause due to enter of cold water into boiler |
| D. | it produces steam from feed water |
| Answer» E. | |
| 28. |
Natural draught produced by a chimney depends upon |
| A. | density of chimney gases |
| B. | height of chimney |
| C. | both ‘density of chimney gases’ and ‘height of chimney’ |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 29. |
Which system consumes less power out of all ash handling systems? |
| A. | mechanical ash handling system |
| B. | pneumatic ash handling system |
| C. | hydraulic ash handling system |
| D. | steam jet ash handling system |
| Answer» B. pneumatic ash handling system | |
| 30. |
5 FUEL AND ASH HANDLING |
| A. | coal ash produced destroys the machinery by entering into them |
| B. | coal ash produced annually accounts for thousands of tones |
| C. | coal ash can be reutilized for some other purpose |
| D. | coal ash affects the health of people working at plants |
| Answer» C. coal ash can be reutilized for some other purpose | |
| 31. |
Which of the following contributes to the improvement of efficiency of Rankine cycle in a Thermal Power Plant? |
| A. | reheating of steam at intermediate stage |
| B. | regeneration use of steam for heating boiler feed water |
| C. | use of high pressures |
| D. | all of the mentioned |
| Answer» E. | |
| 32. |
A simple Rankine cycle produces 40 MW of power, 50 MW of process heat and rejects 60 MW of heat to the surroundings. What is the utilization factor of this co generation cycle neglecting the pump work? |
| A. | 50 |
| B. | 60 |
| C. | 70 |
| D. | 80 |
| Answer» C. 70 | |
| 33. |
Rankine cycle efficiency of a good Steam Power Plant may be in the range of? |
| A. | 15 to 20% |
| B. | 35 to 45% |
| C. | 70 to 80% |
| D. | 90 to 95% |
| Answer» C. 70 to 80% | |
| 34. |
What is the actual turbine inlet temperature in Rankine cycle? |
| A. | 700c |
| B. | 800c |
| C. | 550c |
| D. | 1150c |
| Answer» D. 1150c | |
| 35. |
What is the unit of Heat rate? |
| A. | kj/kw |
| B. | kw/kj |
| C. | kj |
| D. | kw |
| Answer» B. kw/kj | |
| 36. |
Rankine efficiency of a Steam Power Plant |
| A. | improves in summer as compared to that in winter |
| B. | improves in winter as compared to that in summer |
| C. | is unaffected by climatic conditions |
| D. | none of the mentioned |
| Answer» C. is unaffected by climatic conditions | |
| 37. |
LLW stands for |
| A. | low level water |
| B. | low laser width |
| C. | low level waste |
| D. | loss of levels in water |
| Answer» D. loss of levels in water | |
| 38. |
Tailings forms are the residues from |
| A. | uranium |
| B. | thorium |
| C. | cadmium |
| D. | boron |
| Answer» B. thorium | |
| 39. |
For how many days is radioactive solid waste kept is kept under water at 6m deep for initial cooling? |
| A. | 15 days |
| B. | 50 days |
| C. | 30 days |
| D. | 100 days |
| Answer» E. | |
| 40. |
What are released into biosphere from nuclear power plants? |
| A. | gaseous effluents |
| B. | waste product |
| C. | smoke |
| D. | the obtained product |
| Answer» B. waste product | |
| 41. |
Absorption of radioactive element by human, affects their offspring’s. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 42. |
How is High Level solidified nuclear wastes (HLW) stored? |
| A. | concrete tanks |
| B. | canisters |
| C. | packed rock salt |
| D. | soil bins |
| Answer» C. packed rock salt | |
| 43. |
Can vacated coal mines be used for waste disposal. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 44. |
How are active liquids of nuclear waste disposed? |
| A. | stored in concrete tanks and buried underground |
| B. | stored in concrete tanks and buried in sea |
| C. | mixed with other chemicals and left into free atmosphere |
| D. | they are reused and burnt away in gaseous fumes |
| Answer» B. stored in concrete tanks and buried in sea | |
| 45. |
Moderate liquid nuclear wastes are disposed into |
| A. | deep pits |
| B. | buried underground |
| C. | left into rivers |
| D. | left into deep oceans |
| Answer» B. buried underground | |
| 46. |
How are moderate active solid wastes disposed? |
| A. | buried underground |
| B. | buried under sea |
| C. | sent to outer space |
| D. | left out in streams or rivers |
| Answer» B. buried under sea | |
| 47. |
Which of the following is called as cold reserve? |
| A. | reserve capacity available but not ready for use |
| B. | reserve capacity available and ready for use |
| C. | generating capacity connected to bus and ready to take load |
| D. | capacity in service in excess of peak load |
| Answer» B. reserve capacity available and ready for use | |
| 48. |
In practice what is the value of diversity factor? |
| A. | less than unity |
| B. | geater than unity |
| C. | equal to or greater than unity |
| D. | less than zero |
| Answer» C. equal to or greater than unity | |
| 49. |
The load factor is |
| A. | always less than unity |
| B. | less than or greater than 1 |
| C. | always greater than 1 |
| D. | less than zero |
| Answer» B. less than or greater than 1 | |
| 50. |
What is Demand factor? |
| A. | ratio of connected load to maximum demand |
| B. | ratio of average load to connected load |
| C. | ratio of maximum demand to the connected load |
| D. | ratio of kilowatt hour consumed to 24 hours |
| Answer» D. ratio of kilowatt hour consumed to 24 hours | |