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.
| 51. |
_______ is invariably used as base load plant. |
| A. | iesel engine plant |
| B. | uclear power plant |
| C. | as turbine plant |
| D. | umped storage plant |
| Answer» C. as turbine plant | |
| 52. |
________ 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. | |
| 53. |
________ 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 | |
| 54. |
For a diesel generating station the useful life is expected to be around%! |
| A. | 15 to 20 years |
| B. | 20 to 50 years |
| C. | 50 to 75 years |
| D. | 75 to 100 years |
| Answer» B. 20 to 50 years | |
| 55. |
*/*_Annual depreciation cost is calculated by? |
| A. | sinkingfund method |
| B. | straight line method |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» D. none of the above | |
| 56. |
*/*_Which of the following, in a thermal power plant, is not a fixed cost?? |
| A. | Fuel cost |
| B. | Interest on capital |
| C. | Depreciation |
| D. | Insurance charges |
| Answer» B. Interest on capital | |
| 57. |
*/*_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 | |
| 58. |
*/*_public sector undertaking is associated with erection and sometimes running of thermal power plants? |
| A. | NTPC |
| B. | SAIL |
| C. | BEL |
| D. | BHEL |
| Answer» B. SAIL | |
| 59. |
*/*_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 | |
| 60. |
*/*_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 | |
| 61. |
*/*_Annual instalment towards depreciation reduces as rate of interest increases with? |
| A. | sinking fund depreciation |
| B. | straight line depreciation |
| C. | reducing balances depreciation |
| D. | none of the above |
| Answer» B. straight line depreciation | |
| 62. |
*/*_Annual operating expenditure of a power plant consists of? |
| A. | fixed charges |
| B. | semi-fixed charges |
| C. | running charges |
| D. | all of the above |
| Answer» E. | |
| 63. |
*/*_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 | |
| 64. |
*/*_Direct conversion of heat into electrical energy is possible through? |
| A. | fuel cells |
| B. | solar cells |
| C. | MHD generators |
| D. | none of the above |
| Answer» D. none of the above | |
| 65. |
*/*_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) | |
| 66. |
*/*_Large capacity generators are invariably? |
| A. | water cooled |
| B. | natural air cooled |
| C. | forced air cooled |
| D. | hydrogen cooled |
| Answer» E. | |
| 67. |
*/*_Can generate power at unpredictable or uncontrolled times,? |
| A. | Solar power plant |
| B. | Tidal power plant |
| C. | Wind power plant |
| D. | Any of the above |
| Answer» E. | |
| 68. |
*/*_A company can raise funds through? |
| A. | fixed deposits |
| B. | shares |
| C. | bonds |
| D. | any of the above |
| Answer» E. | |
| 69. |
*/*_Demand factor is defined as? |
| A. | average load/maximum load |
| B. | maximum demand/connected load |
| C. | connected load/maximum demand |
| D. | average load x maximum load |
| Answer» C. connected load/maximum demand | |
| 70. |
*/*_For a consumer the most economical power factor is generally? |
| A. | 0.5 lagging |
| B. | 0.5 leading |
| C. | 0.95 lagging |
| D. | 0.95 leading |
| Answer» D. 0.95 leading | |
| 71. |
_ In Hopknison demand rate or two parttariff the demand rate or fixed charges are$? |
| A. | dependent upon the energy consumed |
| B. | dependent upon the maximum demand of the consumer |
| C. | both (A) and (B) |
| D. | neither (A) nor (B) |
| Answer» C. both (A) and (B) | |
| 72. |
_ For which of the following power plants highly skilled engineers are required for running the plants?$? |
| A. | Nuclear power plants |
| B. | Gas turbine power plants |
| C. | Solar power plants |
| D. | Hydro-electric power plants |
| Answer» B. Gas turbine power plants | |
| 73. |
_ Which of the following is not a method for estimating depreciation charges?$? |
| A. | Sinking fund method |
| B. | Straight line method |
| C. | Diminishing value method |
| D. | Halsey |
| Answer» E. | |
| 74. |
_ Generating capacity connected to the bus bars and ready to take load when switched on is known as$? |
| A. | firm power |
| B. | cold reserve |
| C. | hot reserve |
| D. | spinning reserve |
| Answer» E. | |
| 75. |
_ A consumer has to pay lesser fixed charges in$? |
| A. | flat rate tariff |
| B. | two part tariff |
| C. | maximum demand tariff |
| D. | any of the above |
| Answer» D. any of the above | |
| 76. |
_ Load curve helps in deciding$? |
| 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. | |
| 77. |
_ Which plant can never have 100 percent load factor ?$? |
| A. | Peak load plant |
| B. | Base load plant |
| C. | Nuclear power plant |
| D. | Hydro electric plant |
| Answer» B. Base load plant | |
| 78. |
_ The efficiency of a plant is of least concern when it is selected as$? |
| A. | peak load plant |
| B. | casual run plant |
| C. | either (A) or (B) |
| D. | base load plant |
| Answer» D. base load plant | |
| 79. |
_ which of the following plants ?$? |
| A. | Base load plants |
| B. | Peak load plants |
| C. | Both (A) and (B) |
| D. | none of the above |
| Answer» C. Both (A) and (B) | |
| 80. |
_ Direct conversion of heat into electric power is possible through$? |
| A. | fuel cell |
| B. | batteries |
| C. | thermionic converter |
| D. | all of the above |
| Answer» D. all of the above | |
| 81. |
_ In a distribution system, in order to improve power factor, the synchronous capacitors are installed$? |
| A. | at the receiving end |
| B. | at the sending end |
| C. | either (A) or (B) |
| D. | none of the above |
| Answer» B. at the sending end | |
| 82. |
_ In ______ fuel transportation cost is least.$? |
| A. | nuclear power plants |
| B. | diesel generating plants |
| C. | steam power stations |
| D. | none of the above |
| Answer» B. diesel generating plants | |
| 83. |
_ Salvage value of the plant is always$? |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | any of the above |
| Answer» E. | |
| 84. |
_ Maximum demand on a power plant is$? |
| 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 | |
| 85. |
_ Which of the following is the disadvantage of static capacitor for power factor improvement ?$? |
| A. | Easily damaged by high voltage |
| B. | Cannot be repaired |
| C. | Short service life |
| D. | All of the above |
| Answer» E. | |
| 86. |
_ An alternator coupled to a _____ runs at slow speed, as compared to as compared to others.$? |
| A. | diesel engine |
| B. | hydraulic turbine |
| C. | steam turbine |
| D. | gas turbine |
| Answer» C. steam turbine | |
| 87. |
_By the use of which of the following power factor can be improved ?$? |
| A. | Phase advancers |
| B. | Synchronous compensators |
| C. | Static capacitors |
| D. | Any of the above |
| Answer» E. | |
| 88. |
_For the same cylinder dimensions and speed, which of the following engine will produce least power?$? |
| A. | Supercharged engine |
| B. | Diesel engine |
| C. | Petrol engine |
| D. | All of the above engines will equal power |
| Answer» D. All of the above engines will equal power | |
| 89. |
_A low utilization factor for a plant indicates that$? |
| A. | plant is used for stand by purpose only |
| B. | plant is under maintenance |
| C. | plant is used for base load only |
| D. | plant is used for peak load as well as base load |
| Answer» B. plant is under maintenance | |
| 90. |
_Load factor of a power station is defined as$? |
| A. | maximum demand/average load |
| B. | average load x maximum demand |
| C. | average load/maximum demand |
| D. | (average load x maximum demand)172 |
| Answer» D. (average load x maximum demand)172 | |
| 91. |
_Low power factor is usually not due to$? |
| A. | Arc lamps |
| B. | Induction motors |
| C. | Fluorescent tubes |
| D. | Incandescent lamp |
| Answer» E. | |
| 92. |
_Is the reserved generating capacity available for service under emergency conditions which is not kept in operation but in working order,$? |
| A. | Hot reserve |
| B. | Cold reserve |
| C. | Spinning reserve |
| D. | Firm power |
| Answer» C. Spinning reserve | |
| 93. |
________ industry has the least power consumption per tonne of product.$? |
| A. | Soap |
| B. | Sugar |
| C. | Vegetable oil |
| D. | Caustic soda |
| Answer» D. Caustic soda | |
| 94. |
_Approximate estimation of power demand can be made by$? |
| A. | Load survey method |
| B. | Statistical methods |
| C. | Mathematical method |
| D. | All of the above |
| Answer» E. | |
| 95. |
_During load shedding$? |
| A. | system power factor is changed |
| B. | some loads are switched off |
| C. | system voltage is reduced |
| D. | system frequency is reduced Efficiency is the secondary consideration in |
| Answer» C. system voltage is reduced | |
| 96. |
_Which lightening stroke is most dangerous ?$? |
| 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 | |
| 97. |
_Which of the following is the disadvantage of a synchronous condenser ?$? |
| A. | High maintenance cost |
| B. | Continuous losses in motor |
| C. | Noise |
| D. | All of the above |
| Answer» E. | |
| 98. |
_Which of the following plants is almost inevitably used as base load plant ?$? |
| A. | Diesel engine plant |
| B. | Gas turbine plant |
| C. | Nuclear power plant |
| D. | Pumped storage plant |
| Answer» D. Pumped storage plant | |
| 99. |
_Which of the following is not an operating cost ?$? |
| A. | Maintenance cost |
| B. | Fuel cost |
| C. | Salaries of high officials |
| D. | Salaries of operating staff |
| Answer» D. Salaries of operating staff | |
| 100. |
_In an interconnected system, the diversity factor of the whole system$? |
| A. | remains unchanged |
| B. | decreases |
| C. | increases |
| D. | none of the above |
| Answer» D. none of the above | |