MCQOPTIONS
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MCQOPTIONS
This section includes 159 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
________ will be least affected due to charge in supply voltage frequency. |
| A. | lectric clock |
| B. | ixer grinder |
| C. | eiling fan |
| D. | oom heater |
| Answer» E. | |
| 2. |
________ is invariably used for peak load |
| A. | uclear power plant |
| B. | team turbine plant |
| C. | umped storage plant |
| D. | one of the above |
| Answer» D. one of the above | |
| 3. |
For a diesel generating station the useful life is expected to be around |
| A. | 5 to 20 years |
| B. | 0 to 50 years |
| C. | 0 to 75 years |
| D. | 5 to 100 years |
| Answer» B. 0 to 50 years | |
| 4. |
Power plant is expected to have the longest life. |
| A. | team |
| B. | iesel |
| C. | ydroelectric |
| D. | ny of the above |
| Answer» D. ny of the above | |
| 5. |
Load curve helps in deciding |
| A. | otal installed capacity of the plant |
| B. | izes of the generating units |
| C. | perating schedule of generating units |
| D. | ll of the above |
| Answer» E. | |
| 6. |
Is the reserved generating capacity available for service under emergency conditions which is not kept in operation but in working order, |
| A. | ot reserve |
| B. | old reserve |
| C. | pinning reserve |
| D. | irm power |
| Answer» C. pinning reserve | |
| 7. |
In which?of the following power plants the maintenance cost is usually high? |
| A. | uclear power plant |
| B. | ydro-electric power plants |
| C. | hermal power plants |
| D. | iesel engine power plants |
| Answer» D. iesel engine power plants | |
| 8. |
A consumer has to pay lesser fixed charges in |
| A. | lat rate tariff |
| B. | wo part tariff |
| C. | aximum demand tariff |
| D. | ny of the above |
| Answer» D. ny of the above | |
| 9. |
Low power factor is usually not due to |
| A. | rc lamps |
| B. | nduction motors |
| C. | luorescent tubes |
| D. | ncandescent lamp |
| Answer» E. | |
| 10. |
public sector undertaking is associated with erection and sometimes running of thermal power plants |
| A. | TPC |
| B. | AIL |
| C. | EL |
| D. | HEL |
| Answer» B. AIL | |
| 11. |
Generating capacity connected to the bus bars and ready to take load when switched on is known as |
| A. | irm power |
| B. | old reserve |
| C. | ot reserve |
| D. | pinning reserve |
| Answer» E. | |
| 12. |
Load factor of a power station is defined as |
| A. | aximum demand/average load |
| B. | verage load x maximum demand |
| C. | verage load/maximum demand |
| D. | average load x maximum demand)172 |
| Answer» D. average load x maximum demand)172 | |
| 13. |
Which of the following, in a thermal power plant, is not a fixed cost? |
| A. | uel cost |
| B. | nterest on capital |
| C. | epreciation |
| D. | nsurance charges |
| Answer» B. nterest on capital | |
| 14. |
For which of the following power plants highly skilled engineers are required for running the plants? |
| A. | uclear power plants |
| B. | as turbine power plants |
| C. | olar power plants |
| D. | ydro-electric power plants |
| Answer» B. as turbine power plants | |
| 15. |
For the same cylinder dimensions and speed, which of the following engine will produce least power? |
| A. | upercharged engine |
| B. | iesel engine |
| C. | etrol engine |
| D. | ll of the above engines will equal power |
| Answer» D. ll of the above engines will equal power | |
| 16. |
The area under a load curve gives |
| A. | verage demand |
| B. | nergy consumed |
| C. | aximum demand |
| D. | one of the above |
| Answer» C. aximum demand | |
| 17. |
Which of the following is not a method for estimating depreciation charges? |
| A. | inking fund method |
| B. | traight line method |
| C. | iminishing value method |
| D. | alsey |
| Answer» E. | |
| 18. |
A low utilization factor for a plant indicates that |
| A. | lant is used for stand by purpose only |
| B. | lant is under maintenance |
| C. | lant is used for base load only |
| D. | lant is used for peak load as well as base load |
| Answer» B. lant is under maintenance | |
| 19. |
Annual depreciation cost is calculated by |
| A. | inkingfund method |
| B. | traight line method |
| C. | oth (A) and (B) |
| D. | one of the above |
| Answer» D. one of the above | |
| 20. |
In Hopknison demand rate or two parttariff the demand rate or fixed charges are |
| A. | ependent upon the energy consumed |
| B. | ependent upon the maximum demand of the consumer |
| C. | oth (A) and (B) |
| D. | either (A) nor (B) |
| Answer» C. oth (A) and (B) | |
| 21. |
By the use of which of the following power factor can be improved ? |
| A. | hase advancers |
| B. | ynchronous compensators |
| C. | tatic capacitors |
| D. | ny of the above |
| Answer» E. | |
| 22. |
Annual instalment towards depreciation reduces as rate of interest increases with |
| A. | inking fund depreciation |
| B. | traight line depreciation |
| C. | educing balances depreciation |
| D. | one of the above |
| Answer» B. traight line depreciation | |
| 23. |
Which plant can never have 100 percent load factor ? |
| A. | eak load plant |
| B. | ase load plant |
| C. | uclear power plant |
| D. | ydro electric plant |
| Answer» B. ase load plant | |
| 24. |
_______ industry has the least power consumption per tonne of product. |
| A. | oap |
| B. | ugar |
| C. | egetable oil |
| D. | austic soda |
| Answer» D. austic soda | |
| 25. |
In two part tariff, variation in load factor will affect |
| A. | ixed charges |
| B. | perating or running charges |
| C. | oth (A) and (B) |
| D. | ither (A) or (B) |
| Answer» C. oth (A) and (B) | |
| 26. |
In a distribution system, in order to improve power factor, the synchronous capacitors are installed |
| A. | t the receiving end |
| B. | t the sending end |
| C. | ither (A) or (B) |
| D. | one of the above |
| Answer» B. t the sending end | |
| 27. |
Which of the following is the disadvantage of a synchronous condenser ? |
| A. | igh maintenance cost |
| B. | ontinuous losses in motor |
| C. | oise |
| D. | ll of the above |
| Answer» E. | |
| 28. |
The primary reason for low power factor is supply system is due to installation of |
| A. | nduction motors |
| B. | ynchronous motors |
| C. | ingle phase motors |
| D. | .c. motors |
| Answer» B. ynchronous motors | |
| 29. |
which of the following plants ? |
| A. | ase load plants |
| B. | eak load plants |
| C. | oth (A) and (B) |
| D. | one of the above |
| Answer» C. oth (A) and (B) | |
| 30. |
During load shedding |
| A. | ystem power factor is changed |
| B. | ome loads are switched off |
| C. | ystem voltage is reduced |
| D. | ystem frequency is reduced Efficiency is the secondary consideration in |
| Answer» C. ystem voltage is reduced | |
| 31. |
Annual operating expenditure of a power plant consists of |
| A. | ixed charges |
| B. | emi-fixed charges |
| C. | unning charges |
| D. | ll of the above |
| Answer» E. | |
| 32. |
The efficiency of a plant is of least concern when it is selected as |
| A. | eak load plant |
| B. | asual run plant |
| C. | ither (A) or (B) |
| D. | ase load plant |
| Answer» D. ase load plant | |
| 33. |
Approximate estimation of power demand can be made by |
| A. | oad survey method |
| B. | tatistical methods |
| C. | athematical method |
| D. | ll of the above |
| Answer» E. | |
| 34. |
Large capacity generators are invariably |
| A. | ater cooled |
| B. | atural air cooled |
| C. | orced air cooled |
| D. | ydrogen cooled |
| Answer» E. | |
| 35. |
In ______ fuel transportation cost is least. |
| A. | uclear power plants |
| B. | iesel generating plants |
| C. | team power stations |
| D. | one of the above |
| Answer» B. iesel generating plants | |
| 36. |
Which of the following plants is almost inevitably used as base load plant ? |
| A. | iesel engine plant |
| B. | as turbine plant |
| C. | uclear power plant |
| D. | umped storage plant |
| Answer» D. umped storage plant | |
| 37. |
Can generate power at unpredictable or uncontrolled times, |
| A. | olar power plant |
| B. | idal power plant |
| C. | ind power plant |
| D. | ny of the above |
| Answer» E. | |
| 38. |
Salvage value of the plant is always |
| A. | ositive |
| B. | egative |
| C. | ero |
| D. | ny of the above |
| Answer» E. | |
| 39. |
Which of the following is not an operating cost ? |
| A. | aintenance cost |
| B. | uel cost |
| C. | alaries of high officials |
| D. | alaries of operating staff |
| Answer» D. alaries of operating staff | |
| 40. |
A company can raise funds through |
| A. | ixed deposits |
| B. | hares |
| C. | onds |
| D. | ny of the above |
| Answer» E. | |
| 41. |
Maximum demand on a power plant is |
| A. | he greatest of all ?short time interval averaged? demand during a period |
| B. | nstantaneous maximum value of kVA supplied during a period |
| C. | oth (A) or (B) |
| D. | one of the above |
| Answer» B. nstantaneous maximum value of kVA supplied during a period | |
| 42. |
In an interconnected system, the diversity factor of the whole system |
| A. | emains unchanged |
| B. | ecreases |
| C. | ncreases |
| D. | one of the above |
| Answer» D. one of the above | |
| 43. |
Direct conversion of heat into electrical energy is possible through |
| A. | uel cells |
| B. | olar cells |
| C. | HD generators |
| D. | one of the above |
| Answer» D. one of the above | |
| 44. |
Direct conversion of heat into electric power is possible through |
| A. | uel cell |
| B. | atteries |
| C. | hermionic converter |
| D. | ll of the above |
| Answer» D. ll of the above | |
| 45. |
Which lightening stroke is most dangerous ? |
| A. | irect stroke on line conductor |
| B. | ndirect stroke on conductor |
| C. | irect stroke on tower top |
| D. | irect stroke on ground wire |
| Answer» B. ndirect stroke on conductor | |
| 46. |
Demand factor is defined as |
| A. | verage load/maximum load |
| B. | aximum demand/connected load |
| C. | onnected load/maximum demand |
| D. | verage load x maximum load |
| Answer» C. onnected load/maximum demand | |
| 47. |
Which of the following is the disadvantage of static capacitor for power factor improvement ? |
| A. | asily damaged by high voltage |
| B. | annot be repaired |
| C. | hort service life |
| D. | ll of the above |
| Answer» E. | |
| 48. |
Which of the following is an advantage of static capacitor for power factor improvement ? |
| A. | ittle maintenance cost |
| B. | ase in installation |
| C. | ow losses |
| D. | ll of the above |
| Answer» E. | |
| 49. |
For a consumer the most economical power factor is generally |
| A. | .5 lagging |
| B. | .5 leading |
| C. | .95 lagging |
| D. | .95 leading |
| Answer» D. .95 leading | |
| 50. |
An alternator coupled to a _____ runs at slow speed, as compared to as compared to others. |
| A. | iesel engine |
| B. | ydraulic turbine |
| C. | team turbine |
| D. | as turbine |
| Answer» C. team turbine | |