MCQOPTIONS
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MCQOPTIONS
This section includes 122 Mcqs, each offering curated multiple-choice questions to sharpen your Power Systems knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
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 | |
| 52. |
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 | |
| 53. |
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 | |
| 54. |
Which of the following source of power is least reliable ? |
| A. | Solar energy |
| B. | Geothermal power |
| C. | Wind power |
| D. | MHD |
| Answer» D. MHD | |
| 55. |
A pilot exciter is provided on generators for which of the following reasons ? |
| A. | To excite the poles of main exciter |
| B. | To provide requisite starting torque to main exciter |
| C. | To provide requisite starting torque to generator |
| D. | None of the above |
| Answer» B. To provide requisite starting torque to main exciter | |
| 56. |
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 | |
| 57. |
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 | |
| 58. |
Low power factor is usually not due to |
| A. | Arc lamps |
| B. | Induction motors |
| C. | Fluorescent tubes |
| D. | Incandescent lamp |
| Answer» E. | |
| 59. |
Incase 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. | |
| 60. |
With reference to a power station which of the following is not a fixed cost? |
| A. | Fuel cost |
| B. | Interest on capital |
| C. | Insurance charges |
| D. | Depreciation |
| Answer» B. Interest on capital | |
| 61. |
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 | |
| 62. |
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 | |
| 63. |
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 | |
| 64. |
Static capacitors are rated in terms of |
| A. | kW |
| B. | kWh |
| C. | kVAR |
| D. | none of the above |
| Answer» D. none of the above | |
| 65. |
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 | |
| 66. |
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 | |
| 67. |
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. | |
| 68. |
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 | |
| 69. |
In a power plant if the maximum demand on the plant is equal to the plant capacity, then |
| A. | Plant reserve capacity will be zero |
| B. | Diversity factor will be unity |
| C. | Load factor will be unity |
| D. | Load factor will be nearly 60% |
| Answer» B. Diversity factor will be unity | |
| 70. |
Which of the following is not necessarily an advantage of interconnecting various power stations? |
| A. | Improved frequency of power supplied |
| B. | Reduction in total installed capacity |
| C. | Increased reliability |
| D. | Economy in operation of plants |
| Answer» B. Reduction in total installed capacity | |
| 71. |
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. | |
| 72. |
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. | |
| 73. |
power plant cannot have single unit of 100 MW. |
| A. | Hydroelectric |
| B. | Nuclear |
| C. | Steam |
| D. | Diesel |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 74. |
In India production and distribution of electrical energy is confined to |
| A. | private sector |
| B. | public sector |
| C. | government sectors |
| D. | joint sector |
| E. | none of the above |
| Answer» C. government sectors | |
| 75. |
An over excited synchronous motor on noload is known as |
| A. | synchronous condenser |
| B. | generator |
| C. | induction motor |
| D. | alternator |
| Answer» B. generator | |
| 76. |
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 | |
| 77. |
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) | |
| 78. |
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. | |
| 79. |
Annual depreciation as per straight line method, is calculated by |
| A. | the capital cost divided by number of year of life |
| B. | the capital cost minus the salvage value, is divided by the number of years of life |
| C. | increasing a uniform sum of money per annum at stipulated rate of interest |
| D. | none of the above |
| Answer» C. increasing a uniform sum of money per annum at stipulated rate of interest | |
| 80. |
High load factor indicates |
| A. | cost of generation per unit power is increased |
| B. | total plant capacity is utilised for most of the time |
| C. | total plant capacity is not properly utilised for most of the time |
| D. | none of the above |
| Answer» C. total plant capacity is not properly utilised for most of the time | |
| 81. |
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 | |
| 82. |
A load curve indicates |
| A. | average power used during the period |
| B. | average kWh (kW) energy consumption during the period |
| C. | either of the above |
| D. | none of the above |
| Answer» C. either of the above | |
| 83. |
Different generating stations use following prime movers |
| A. | Diesel engine |
| B. | Hydraulic turbine |
| C. | Gas turbine |
| D. | Any of the above |
| Answer» E. | |
| 84. |
A nuclear power plant is invariably used as a |
| A. | peak load plant |
| B. | base load plant |
| C. | stand-by plant |
| D. | spinning reserve plant |
| E. | any of the above |
| Answer» C. stand-by plant | |
| 85. |
Which of the following component, in a steam power plant, needs maximum maintenance attention? |
| A. | Steam turbine |
| B. | Condenser |
| C. | Water treatment plant |
| D. | Boiler |
| Answer» E. | |
| 86. |
Air will not be the working substance in which of the following ? |
| A. | Closed cycle gas turbine |
| B. | Open cycle gas turbine |
| C. | Diesel engine |
| D. | Petrol engine |
| Answer» B. Open cycle gas turbine | |
| 87. |
offers the highest electric load. |
| A. | Television set |
| B. | Toaster |
| C. | Vacuum cleaner |
| D. | Washing machine |
| Answer» C. Vacuum cleaner | |
| 88. |
Ships are generally powered by |
| A. | nuclear power plants |
| B. | hydraulic turbines |
| C. | diesel engines |
| D. | steam accumulators |
| E. | none of the above |
| Answer» D. steam accumulators | |
| 89. |
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 | |
| 90. |
_______ will offer the least load. |
| A. | Vacuum cleaner |
| B. | Television |
| C. | Hair dryer |
| D. | Electric shaver |
| Answer» E. | |
| 91. |
The least share of power is provided in India, by which of the following power plants? |
| A. | Diesel power plants |
| B. | Thermal power plants |
| C. | Hydro-electric power plants |
| D. | Nuclear power plants |
| Answer» B. Thermal power plants | |
| 92. |
Which of the following generating station has minimum ruiyiing cost ? |
| A. | Nuclear |
| B. | Hydro |
| C. | Thermal |
| D. | Diesel |
| Answer» C. Thermal | |
| 93. |
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. | |
| 94. |
An induction motor has relatively high power factor at |
| A. | rated r.p.m. |
| B. | no load |
| C. | 20 percent load |
| D. | near full load |
| E. | none of the above |
| Answer» E. none of the above | |
| 95. |
The knowledge of diversity factor helps in determining |
| A. | plant capacity |
| B. | average load |
| C. | peak load |
| D. | kWh generated |
| E. | none of the above |
| Answer» B. average load | |
| 96. |
Following power plant has instant starting |
| A. | nuclear power plant |
| B. | hydro power plant |
| C. | diesel power plant |
| D. | both (B) and (C) |
| E. | none of the above |
| Answer» E. none of the above | |
| 97. |
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. | |
| 98. |
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. | |
| 99. |
When the demand of consumers is not met by a power plant, it will resort to which of the following ? |
| A. | Load shedding |
| B. | Power factor improvement at the , generators |
| C. | Penalising high load consumers by increasing the charges for electricity |
| D. | Efficient plant operation |
| Answer» B. Power factor improvement at the , generators | |
| 100. |
Submarines for under water movement, are powered by which of the following ? |
| A. | Steam accumulators |
| B. | Air motors |
| C. | Diesel engines |
| D. | Batteries |
| Answer» E. | |