MCQOPTIONS
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MCQOPTIONS
This section includes 80 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which plant can never have 100 percent load factor? |
| A. | Peak load plant |
| B. | Base load plant |
| C. | Nuclear power plant |
| D. | Hydro electric plant |
| Answer» B. Base load plant | |
| 2. |
___________ will offer the least load. |
| A. | Vacuum cleaner |
| B. | Television |
| C. | Hair dryer |
| D. | Electric shaver |
| Answer» E. | |
| 3. |
__________ will be least affected due to charge in supply voltage frequency. |
| A. | Electric clock |
| B. | Mixer grinder |
| C. | Ceiling fan |
| D. | Room heater |
| Answer» E. | |
| 4. |
Which of the following source of power is least reliable? |
| A. | Solar energy |
| B. | Geothermal power |
| C. | Wind power |
| D. | iMHD |
| Answer» E. | |
| 5. |
Which of the following should be used for extinguishing electrical fires? |
| A. | Water |
| B. | Carbon tetrachloride fire extinguisher |
| C. | Foam type fire extinguisher |
| D. | CO2 fire extinguisher |
| Answer» C. Foam type fire extinguisher | |
| 6. |
Which of the following plants is almost inevitably used as base load plant? |
| A. | Diesel engine plant |
| B. | Gas turbine plant |
| C. | Nuclear power plant |
| D. | Pumped storage plant |
| Answer» D. Pumped storage plant | |
| 7. |
Which of the following is the essential requirement of peak load plant ? |
| A. | It should run at high speed |
| B. | It should produce high voltage |
| C. | It should be small in size |
| D. | It should be capable of starting quickly |
| Answer» E. | |
| 8. |
Which of the following is the disadvantage of static capacitor for power factor improvement? |
| A. | Easily damaged by high voltage |
| B. | Cannot be repaired |
| C. | Short service life |
| D. | All of the above |
| Answer» E. | |
| 9. |
Which of the following is the disadvantage of a synchronous condenser? |
| A. | High maintenance cost |
| B. | Continuous losses in motor |
| C. | Noise |
| D. | All of the above |
| Answer» E. | |
| 10. |
Which of the following is the disadvantage due to low power factor? |
| A. | Poor voltage regulation |
| B. | Increased transmission losses |
| C. | High cost of equipment for a given load |
| D. | All of the above |
| Answer» E. | |
| 11. |
Which of the following is not an operating cost? |
| A. | Maintenance cost |
| B. | Fuel cost |
| C. | Salaries of high officials |
| D. | Salaries of operating staff |
| Answer» D. Salaries of operating staff | |
| 12. |
Which of the following is not a source of power? |
| A. | Thermocouple |
| B. | Photovoltaic cell |
| C. | Solar cell |
| D. | Photoelectric cell |
| Answer» B. Photovoltaic cell | |
| 13. |
Which of the following is an advantage of static capacitor for power factor improvement? |
| A. | Little maintenance cost |
| B. | Ease in installation |
| C. | Low losses |
| D. | All of the above |
| Answer» E. | |
| 14. |
Which of the following generating station has minimum running cost ? |
| A. | Nuclear |
| B. | Hydro |
| C. | Thermal |
| D. | Diesel |
| Answer» C. Thermal | |
| 15. |
Which of the following devices may be used to provide protection against lightening over voltages? |
| A. | Horn gaps |
| B. | Rod gaps |
| C. | Surge absorbers |
| D. | All of the above |
| Answer» E. | |
| 16. |
Which of the following are not repayable after a stipulated period? |
| A. | Shares |
| B. | Fixed deposits |
| C. | Cash certificates |
| D. | Bonds |
| Answer» B. Fixed deposits | |
| 17. |
Which lightening stroke is most dangerous? |
| A. | Direct stroke on line conductor |
| B. | Indirect stroke on conductor |
| C. | Direct stroke on tower top |
| D. | Direct stroke on ground wire |
| Answer» B. Indirect stroke on conductor | |
| 18. |
When the demand of consumers is not met by a power plant, it will resort to which of the following? |
| A. | Efficient plant operation |
| B. | Power factor improvement at the , generators |
| C. | Penalising high load consumers by increasing the charges for electricity |
| D. | Load shedding |
| Answer» E. | |
| 19. |
The primary reason for low power factor is supply system is due to installation of____________? |
| A. | induction motors |
| B. | synchronous motors |
| C. | single phase motors |
| D. | d.c. motors |
| Answer» B. synchronous motors | |
| 20. |
The load factor of domestic load is usually____________? |
| A. | 10 to 15% |
| B. | 30 to 40% |
| C. | 50 to 60% |
| D. | 60 to 70% |
| Answer» B. 30 to 40% | |
| 21. |
The knowledge of diversity factor helps in determining__________? |
| A. | plant capacity |
| B. | average load |
| C. | peak load |
| D. | kWh generated |
| Answer» B. average load | |
| 22. |
The increased load during summer months is due to____________? |
| A. | increased business activity |
| B. | increased water supply |
| C. | increased use of fans and air conditioners |
| D. | none of the above |
| Answer» D. none of the above | |
| 23. |
The expected useful life of an hydroelectric power station is around_________________? |
| A. | 15 years |
| B. | 30 years |
| C. | 60 years |
| D. | 100 years |
| Answer» E. | |
| 24. |
The efficiency of a plant is of least concern when it is selected as___________? |
| A. | peak load plant |
| B. | casual run plant |
| C. | either A. or (b) |
| D. | base load plant |
| Answer» D. base load plant | |
| 25. |
The effect of electric shock on human body depends on which of the following? |
| A. | current |
| B. | voltage |
| C. | duration of contact |
| D. | all of the above |
| Answer» E. | |
| 26. |
The connected load of a IVMIM uir consumer is around___________? |
| A. | 5 kW |
| B. | 40 kV |
| C. | 80 kW |
| D. | 120 kW |
| Answer» B. 40 kV | |
| 27. |
The area under a load curve gives__________? |
| A. | average demand |
| B. | energy consumed |
| C. | maximum demand |
| D. | none of the above |
| Answer» C. maximum demand | |
| 28. |
Salvage value of the plant is always____________? |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | any of the above |
| Answer» E. | |
| 29. |
power plant is expected to have the longest life? |
| A. | Steam |
| B. | Diesel |
| C. | Hydroelectric |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 30. |
Power plant having maximum demand more than the installed rated capacity will have utilization factor? |
| A. | equal to unity |
| B. | less than unity |
| C. | more than unity |
| D. | none of the above |
| Answer» D. none of the above | |
| 31. |
_________offers the highest electric load. |
| A. | Television set |
| B. | Toaster |
| C. | Vacuum cleaner |
| D. | Washing machine |
| Answer» C. Vacuum cleaner | |
| 32. |
Most efficient plants are normally used as____________? |
| A. | peak load plants |
| B. | base load plants |
| C. | either A. or (b) |
| D. | none of the above |
| Answer» C. either A. or (b) | |
| 33. |
Maximum demand on a power plant is_________________? |
| A. | the greatest of all “short time interval averaged” demand during a period |
| B. | instantaneous maximum value of kVA supplied during a period |
| C. | both A. or B. |
| D. | none of the above |
| Answer» B. instantaneous maximum value of kVA supplied during a period | |
| 34. |
Low power factor is usually not due to___________? |
| A. | arc lamps |
| B. | induction motors |
| C. | fluorescent tubes |
| D. | incandescent lamp |
| Answer» E. | |
| 35. |
Load shedding is possible through which of the following? |
| A. | Switching of the loads |
| B. | Frequency reduction |
| C. | Voltage reduction |
| D. | Any of the above |
| Answer» E. | |
| 36. |
Load factor of a power station is generally___________? |
| A. | equal to unity |
| B. | less than unity |
| C. | more than unity |
| D. | equal to zero Diversity factor is always |
| Answer» C. more than unity | |
| 37. |
Load curve of a power plant has always____________? |
| A. | zero slope |
| B. | positive slope |
| C. | negative slope |
| D. | All of these |
| Answer» E. | |
| 38. |
Load curve is useful in deciding the_____________? |
| A. | operating schedule of generating units |
| B. | sizes of generating units |
| C. | total installed capacity of the plant |
| D. | all of the above |
| Answer» E. | |
| 39. |
Load curve helps in deciding___________? |
| A. | total installed capacity of the plant |
| B. | sizes of the generating units |
| C. | operating schedule of generating units |
| D. | all of the above |
| Answer» E. | |
| 40. |
Large capacity generators are invariably___________? |
| A. | water cooled |
| B. | natural air cooled |
| C. | forced air cooled |
| D. | hydrogen cooled |
| Answer» E. | |
| 41. |
____________is the reserved generating capacity available for service under emergency conditions which is not kept in operation but in working order. |
| A. | Hot reserve |
| B. | Cold reserve |
| C. | Spinning reserve |
| D. | Firm power |
| Answer» C. Spinning reserve | |
| 42. |
__________ is invariably used for peak load |
| A. | Nuclear power plant |
| B. | Steam turbine plant |
| C. | Pumped storage plant |
| D. | None of the above |
| Answer» D. None of the above | |
| 43. |
___________ is invariably used as base load plant. |
| A. | Diesel engine plant |
| B. | Nuclear power plant |
| C. | Gas turbine plant |
| D. | Pumped storage plant |
| Answer» C. Gas turbine plant | |
| 44. |
__________ industry has the least power consumption per ton of product? |
| A. | Soap |
| B. | Sugar |
| C. | Vegetable oil |
| D. | Caustic soda |
| Answer» D. Caustic soda | |
| 45. |
In which’of the following power plants the maintenance cost is usually high? |
| A. | Nuclear power plant |
| B. | Hydro-electric power plants |
| C. | Thermal power plants |
| D. | Diesel engine power plants |
| Answer» D. Diesel engine power plants | |
| 46. |
In two part tariff, variation in load factor will affect____________? |
| A. | fixed charges |
| B. | operating or running charges |
| C. | both A. and (b) |
| D. | either A. or (b) |
| Answer» C. both A. and (b) | |
| 47. |
In power plants insurance cover is provided for which of the following? |
| A. | Unskilled workers only |
| B. | Skilled workers only |
| C. | Equipment only |
| D. | All of the above |
| Answer» E. | |
| 48. |
In Hopkinson demand rate or two part tariff the demand rate or fixed charges are__________? |
| A. | dependent upon the energy consumed |
| B. | dependent upon the maximum demand of the consumer |
| C. | both A and B |
| D. | neither A nor B |
| Answer» C. both A and B | |
| 49. |
In _________ fuel transportation cost is least. |
| A. | nuclear power plants |
| B. | diesel generating plants |
| C. | steam power stations |
| D. | None |
| Answer» B. diesel generating plants | |
| 50. |
In case of _________ fuel transportation is the major problem. |
| A. | diesel power plants |
| B. | nuclear power plants |
| C. | hydro-electric power plants |
| D. | thermal power plants |
| Answer» E. | |