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.
| 101. |
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 | |
| 102. |
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. | |
| 103. |
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. | |
| 104. |
In a load curve the highest point represents |
| A. | peak demand |
| B. | average demand |
| C. | diversified demand |
| D. | none of the above |
| Answer» B. average demand | |
| 105. |
Which of the following equipment provides fluctuating load? |
| A. | Exhaust fan |
| B. | Lathe machine |
| C. | Welding transformer |
| D. | All of the above |
| Answer» D. All of the above | |
| 106. |
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 | |
| 107. |
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 | |
| 108. |
_______ 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 | |
| 109. |
Depreciation charges are high in case of |
| A. | thermal plant |
| B. | diesel plant |
| C. | hydroelectric plant |
| D. | none of the above |
| Answer» B. diesel plant | |
| 110. |
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 | |
| 111. |
THE_LOAD_FACTOR_IS___________?$ |
| A. | always less than unity |
| B. | less than or greater than 1 |
| C. | always greater than 1 |
| D. | less than zero |
| Answer» B. less than or greater than 1 | |
| 112. |
Coincidence factor is reciprocal of ___________$ |
| A. | average load |
| B. | demand factor |
| C. | capacity factor |
| D. | diversity factor |
| Answer» E. | |
| 113. |
In_practice_what_is_the_value_of_diversity_factor?$ |
| A. | Less than Unity |
| B. | Geater than Unity |
| C. | Equal to or greater than Unity |
| D. | Less than zero |
| Answer» C. Equal to or greater than Unity | |
| 114. |
Which of the following is called as cold reserve? |
| A. | Reserve capacity available but not ready for use |
| B. | Reserve capacity available and ready for use |
| C. | Generating capacity connected to bus and ready to take load |
| D. | Capacity in service in excess of peak load |
| Answer» B. Reserve capacity available and ready for use | |
| 115. |
Which of the following represents the annual average load? |
| A. | (KWh supplied in a day)/24 |
| B. | {(KWh supplied in a day)/ 24 } √ó 365 |
| C. | {(KWh supplied in a month)/(30 x 24) |
| D. | (KWh supplied in a year) / (24 √ó 365) |
| Answer» E. | |
| 116. |
What is Demand factor? |
| A. | Ratio of connected load to maximum demand |
| B. | Ratio of average load to connected load |
| C. | Ratio of maximum demand to the connected load |
| D. | Ratio of kilowatt hour consumed to 24 hours |
| Answer» D. Ratio of kilowatt hour consumed to 24 hours | |
| 117. |
Size and cost of installation depends upon ____________ |
| A. | average load |
| B. | maximum demand |
| C. | square mean load |
| D. | square of peak load |
| Answer» C. square mean load | |
| 118. |
During which time the demand of electrical energy is maximum? |
| A. | 2 A.M. to 5 A.M. |
| B. | 5 A.M. to 12 P.M. |
| C. | 12 P.M. to 7 P.M. |
| D. | 7 P.M. to 9 P.M |
| Answer» E. | |
| 119. |
Load duration curve indicates _______ |
| A. | the variation of load during different hours of the day |
| B. | total number of units generated for the given demand |
| C. | total energy consumed by the load |
| D. | the number of hours for which the particular load lasts during a day |
| Answer» E. | |
| 120. |
Which of the following is equal to the maximum demand? |
| A. | The ratio of area under curve to the total area of rectangle |
| B. | The ratio of area under curve and number of hours |
| C. | The peak of the load curve |
| D. | The area under the curve |
| Answer» D. The area under the curve | |
| 121. |
The area under the load curve represents ____________ |
| A. | the average load on power system |
| B. | maximum demand |
| C. | number of units generated |
| D. | load factor |
| Answer» D. load factor | |
| 122. |
What is the advantage of sectionalizing of power plant? |
| A. | High reliability |
| B. | Low capital cost |
| C. | Low maintenance |
| D. | Easy operation |
| Answer» B. Low capital cost | |