MCQOPTIONS
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MCQOPTIONS
This section includes 91 Mcqs, each offering curated multiple-choice questions to sharpen your Energy Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The net amount of power which is continuously available from a plant without any break is known as _____________ |
| A. | firm power |
| B. | secondary power |
| C. | power factor |
| D. | utilization factor |
| Answer» B. secondary power | |
| 2. |
The retarding and accelerating heads are developed more promptly in ________________ |
| A. | simple surge tank |
| B. | restricted orifice surge chamber |
| C. | differential surge chamber |
| D. | multi surge chamber |
| Answer» D. multi surge chamber | |
| 3. |
If the peak load for a power plant equals the plant capacity then the ratio of the capacity factor to load factor will be _________________ |
| A. | 1 |
| B. | 0 |
| C. | < 1 |
| D. | > 1 |
| Answer» B. 0 | |
| 4. |
The correct sequence in the direction of the flow of water for installations in a hydropower plant is _______________________ |
| A. | Reservoir, Surge tank, Turbine, Penstock |
| B. | Reservoir, Penstock, Surge tank, Turbine |
| C. | Reservoir, Penstock, Turbine, Surge tank |
| D. | Reservoir, Surge tank, Penstock, Turbine |
| Answer» C. Reservoir, Penstock, Turbine, Surge tank | |
| 5. |
Which of the following dam is not an example of High head scheme? |
| A. | Bhakra dam in Punjab |
| B. | Rihand dam In UP |
| C. | Hoover Dam in the USA |
| D. | Sarda canal |
| Answer» E. | |
| 6. |
Which of the following plants utilize the minimum flow in a river having no appreciable pondage on its upstream side? |
| A. | Storage plant |
| B. | Run-off river plant |
| C. | Pumped storage plants |
| D. | Tidal plants |
| Answer» C. Pumped storage plants | |
| 7. |
Which among the following is an example of a tidal plant? |
| A. | Rance power station in France |
| B. | Ganguwal powerhouse located on Nangal hydel channel in India |
| C. | Sarda powerhouse located on Sarda canal in UP in India |
| D. | Mohammad Pur and Pathri powerhouses on Ganga Canal |
| Answer» B. Ganguwal powerhouse located on Nangal hydel channel in India | |
| 8. |
An impulse turbine like a Pelton’s turbine is __________________________ |
| A. | an open body exposed to the atmosphere |
| B. | a closed body not exposed to the atmosphere |
| C. | a partially open and partially closed body |
| D. | depends on the design requirements |
| Answer» B. a closed body not exposed to the atmosphere | |
| 9. |
Which of the following is an example of an impulse turbine? |
| A. | Pelton turbine |
| B. | Francis turbine |
| C. | Kaplan turbine |
| D. | Propeller turbine |
| Answer» B. Francis turbine | |
| 10. |
Forebay provides temporary storage before the water goes to the turbine. Following perform the function of forebay ____________________ |
| A. | river |
| B. | tailrace channel |
| C. | reservoir |
| D. | approach channel |
| Answer» D. approach channel | |
| 11. |
Pick the correct choice of turbine required to generate 10,000 HP under a head of 81 m while working at a speed of 500 rpm. |
| A. | Pelton |
| B. | Kaplan |
| C. | Bulb |
| D. | Francis |
| Answer» E. | |
| 12. |
If the peak load on a power plant having a capacity of 100 MW is 70 MW during a given week. Calculate the utilization factor. |
| A. | 0.35 |
| B. | 0.50 |
| C. | 0.70 |
| D. | 0.60 |
| Answer» D. 0.60 | |
| 13. |
To avoid the possible damage to the wicket gates and turbine runners _________________ is provided. |
| A. | trash racks |
| B. | surge chamber |
| C. | floating boom |
| D. | racks and trolley arrangement |
| Answer» B. surge chamber | |
| 14. |
Which among the following plant generates power during peak hours? |
| A. | Storage plant |
| B. | Run-off river plant |
| C. | Pumped storage plants |
| D. | Tidal plants |
| Answer» D. Tidal plants | |
| 15. |
In case of long penstocks, ___________________ is generally provided so as to absorb water hammer pressure. |
| A. | trash racks |
| B. | surge chamber |
| C. | floating boom |
| D. | racks and trolley arrangement |
| Answer» C. floating boom | |
| 16. |
The difference of head at the point of entry and exit of turbine is _______________ |
| A. | design head |
| B. | gross head |
| C. | effective head |
| D. | rated head |
| Answer» D. rated head | |
| 17. |
In a reaction turbine like a Francis turbine or a Kaplan turbine ______________ |
| A. | the potential head of water is totally changed into the kinetic head |
| B. | the potential head of water is partially changed into the kinetic head |
| C. | the potential head of water is not at all changed into the kinetic head |
| D. | the change of potential head of water totally or partially depends on other factors as well |
| Answer» C. the potential head of water is not at all changed into the kinetic head | |
| 18. |
An impulse turbine is essentially a __________________ |
| A. | low-speed turbine and is used for high heads |
| B. | low-speed turbine and is used for low heads |
| C. | high-speed turbine and is used for high heads |
| D. | high-speed turbine and is used for low heads |
| Answer» B. low-speed turbine and is used for low heads | |
| 19. |
The value of power factor is generally _____________________ |
| A. | equal to unity |
| B. | less than unity |
| C. | greater than unity |
| D. | equal to zero |
| Answer» C. greater than unity | |
| 20. |
The minimum power which a hydropower plant can generate throughout the year is called as ________________ |
| A. | power plant capacity |
| B. | power plant load |
| C. | firm power |
| D. | water power |
| Answer» D. water power | |
| 21. |
Pondage in a hydropower station is _________________________________ |
| A. | pond level |
| B. | temporary storage to meet peak demands |
| C. | excess runoff to last for years |
| D. | excess runoff for a few hours only |
| Answer» C. excess runoff to last for years | |
| 22. |
Calculate utilisation factor if the maximum power utilised is 40,000 kW and two turbo generators installed each of capacity 23,000 kW. |
| A. | 73% |
| B. | 87% |
| C. | 57.5% |
| D. | 63% |
| Answer» C. 57.5% | |
| 23. |
For a hydropower plant having 150 m head of stored water behind the dam. The water in the reservoir is clear and load on the powerhouse is not likely to fluctuate much. Which type of turbine will be suitable for the same? |
| A. | Pelton turbine |
| B. | Francis turbine |
| C. | Kaplan turbine |
| D. | Propeller turbine |
| Answer» C. Kaplan turbine | |
| 24. |
The surge tank serves which of the following purposes?i. It allows the sediment to settle downii. It prevents debris from entering powerhouseiii. It controls pressure variations in pipelinesiv. It regulates flow in the pipelines |
| A. | i and ii |
| B. | ii and iii |
| C. | iii and iv |
| D. | i, ii and iii |
| Answer» D. i, ii and iii | |
| 25. |
The load on a hydel plant varies from a minimum of 10,000 kW to a maximum of 35,000 kW. Two turbo-generators of capacities 20,000 kW each have been installed. Calculate Plant factor. |
| A. | 50% |
| B. | 51% |
| C. | 56.2% |
| D. | 59.7% |
| Answer» D. 59.7% | |
| 26. |
When the powerhouse is located near the dam as is done in the low head installations, it is known as _________________ |
| A. | concentrated fall hydroelectric development |
| B. | divided fall hydroelectric development |
| C. | concentrated fall thermal power development |
| D. | divided fall thermal power development |
| Answer» B. divided fall hydroelectric development | |
| 27. |
Kaplan turbines are found to be more versatile and costly in their initial cost as compared to propeller turbines. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 28. |
What is the correct expansion of DAE? |
| A. | The Department of Atomic Energy |
| B. | The Discipline of Atomic Energy |
| C. | The Division of Atomic Energy |
| D. | The Domain of Atomic Energy |
| Answer» B. The Discipline of Atomic Energy | |
| 29. |
The ratio of maximum power utilised to the maximum power available is _____________ |
| A. | power factor |
| B. | plant use factor |
| C. | reserve capacity |
| D. | capacity factor |
| Answer» C. reserve capacity | |
| 30. |
To ensure maximum overall plant efficiency, the rated head should be equal to ______________ |
| A. | the design head |
| B. | the gross head |
| C. | the operating head |
| D. | effective head |
| Answer» B. the gross head | |
| 31. |
The first power station of India was installed at _________________ |
| A. | Mysore |
| B. | Bombay |
| C. | Darjeeling |
| D. | Bangalore |
| Answer» D. Bangalore | |
| 32. |
During a certain week a power plant turns out 84,00,000 kWh and the peak load during the week is 100,000 kW. What is the load factor during the week? |
| A. | 40% |
| B. | 45% |
| C. | 50% |
| D. | 60% |
| Answer» D. 60% | |
| 33. |
A canal drop is 6 meters and discharges available through the turbine is 50 cumec. Find the electrical energy available. |
| A. | 2352 KW |
| B. | 2352 MW |
| C. | 2.352 kW |
| D. | 235.2 kW |
| Answer» B. 2352 MW | |
| 34. |
For a hydropower plant working on 150 m head, the water is sandy and the load on the plant is highly variable. Which type of turbine will generally be recommended? |
| A. | Pelton Turbine |
| B. | Francis turbine |
| C. | Kaplan turbine |
| D. | Propeller turbine |
| Answer» B. Francis turbine | |
| 35. |
400 cumecs of water are being released from dam storage to meet the downstream demand through the turbines of the connected hydro plant. The effective head of water acting on the turbines is 50 m. The efficiency of the hydro plant is 0.8. The electrical power generated from this plant is __________________ |
| A. | 1,56,800 MW |
| B. | 156.8 M kW |
| C. | 156.8 MW |
| D. | 156.8 kW |
| Answer» D. 156.8 kW | |
| 36. |
If the peak load on a power plant having a capacity of 100 MW is 70 MW during a given week and the energy produced is 58, 80,000 kWh, the capacity factor for the plant for the week will be ___________________ |
| A. | 35% |
| B. | 50% |
| C. | 70% |
| D. | 65% |
| Answer» B. 50% | |
| 37. |
If two identical pumps each capable to deliver a discharge Q against a head H are connected ___________________________ |
| A. | in parallel, the resulting discharge is 2Q against a head H |
| B. | in parallel, the resulting discharge is Q against a head of 2H |
| C. | in series, the resulting discharge is 2Q against a head H |
| D. | in series, the resulting discharge is Q against a head 2H |
| Answer» B. in parallel, the resulting discharge is Q against a head of 2H | |
| 38. |
Sharp bends must be avoided in penstocks while designing components of the hydroelectric scheme. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 39. |
Identify the correct statement in regard to hydropower. |
| A. | Hydropower stations are generally labour-oriented |
| B. | The gestation period for hydro-power plant is usually small |
| C. | The hydro generators give high efficiency over a wide range of load |
| D. | In a hydropower scheme, the firm power is usually high as compared to tidal power |
| Answer» D. In a hydropower scheme, the firm power is usually high as compared to tidal power | |
| 40. |
In a Francis turbine, the water flows through a closed draft tube. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 41. |
Which one is the first nuclear power plant in India? |
| A. | Tarapur atomic power station |
| B. | Kaiga atomic power station |
| C. | Rawatbhata Atomic power station |
| D. | Narora atomic power station |
| Answer» B. Kaiga atomic power station | |
| 42. |
Convert the hydropower potential of 84 GW at 60% load factor into Trillion watts hour. |
| A. | 441 TWh |
| B. | 735 TWh |
| C. | 553 TWh |
| D. | 345 TWh |
| Answer» B. 735 TWh | |
| 43. |
The natural high waterfalls may be used for generation of ____________________ |
| A. | hydro-power |
| B. | water-power |
| C. | both hydropower and water power |
| D. | thermal power |
| Answer» D. thermal power | |
| 44. |
The Pumps in series operation allow the head to increase and the pumps in parallel operation increase the flow rate. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 45. |
In India, the nuclear power generation is about ____________ of the total power generation. |
| A. | 3% |
| B. | 4% |
| C. | 5% |
| D. | 6% |
| Answer» B. 4% | |
| 46. |
Which of the following is turbine is used for medium heads ranging from 25 to 150 meters? |
| A. | Pelton turbine |
| B. | Kaplan turbine |
| C. | Francis turbine |
| D. | Propeller turbine |
| Answer» D. Propeller turbine | |
| 47. |
As per estimate made by the Central Electricity Authority, the potential of the country is accessed at 84 GW at load factor value of _________________ |
| A. | 40% |
| B. | 60% |
| C. | 80% |
| D. | 20% |
| Answer» C. 80% | |
| 48. |
Consider the following statements.i. Runoff river plants can be located on any riverii. Runaway speed of a turbine is generally 180% of normal speediii. Underground power stations are suited to areas susceptible to landslidesiv. Higher the specific speed, higher will be the discharge and the headWhich of these statements are correct? |
| A. | i and ii |
| B. | ii and iii |
| C. | i and iv |
| D. | ii and iv |
| Answer» C. i and iv | |
| 49. |
In a low head scheme, a weir or barrage is constructed to raise the water level. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 50. |
If the specific speed in revolution per minute of a turbine is in between 60 to 300, the type of the turbine is ________________ |
| A. | Pelton turbine |
| B. | Francis turbine |
| C. | Propeller turbine |
| D. | Kaplan turbine |
| Answer» C. Propeller turbine | |