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1) What does a load duration curve represent? a. The variation of load during different hours of the day b. Average load c. The number of hours for which a particular lasts during the day d. None of the above
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2) What is the shape of the load duration curve? a. Rectangular shape b. Triangular shape c. Parabolic shape d. Free hand sketch
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3) Maximum and Minimum loads on the load duration curve is represented on which respective side? a. Left and Right. b. Right and Left. c. Randomly. d. None of these.
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4) What does the chronological load curve indicate? a. Variation in demand factor during 24 hours. b. Variation of demand from instant to instant during 24 hour. c. The total energy consumed upto different times of the day. d. The total number of hours for which a particular load lasts during the day.
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5) What is a load factor? a. The ratio of average to maximum demand. b. The ratio of maximum demand to average load. c. The product of maximum demand and average load. d. The ratio of average load to the plant capacity.
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6) What is the load factor of a power plant? a. Greater than unity b. Less than unity c. Always more than unity d. Normally more than unity
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7) The load factor plays a key role in determining which among the following? a. Plant capacity b. Overall cost per unit generated c. Overall demand d. Both (a) and (c)
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8) An industrial consumer has a load pattern of 2000 kW 0.8 lag for 12 hours and 1000 kW unity power factor for 12 hours. What is the load factor? a. 0.5 b. 0.55 c. 0.6 d. 0.75
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9) What is the plant capacity factor? a. A ratio of kWh generated to the product of plant capacity and the number of hours for which the plant is in operation. b. The ratio of sum of individual maximum demands to the maximum demand on power stations. c. The ratio of actual energy produced to the maximum possible energy. d. The ratio of maximum demand on the power station to the connected load.
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10) Capacity factor will be very low when the power plant _________________. a. is operated as base load plant. b. is operated for supplying base load as well as the peak loads. c. is operated in emergency only. d. is under maintainance.
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11) A thermal generating station has a installed capacity of 15 MW and supplies a daily load of 10 Mw for 12 hours and 5 MW for remaining 12 hours. The plant capacity factor for this station is _______. a. 1 b. 0.75 c. 0.67 d. 0.5
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12) In a power station, the cost of generation of power reduces most effectively when _______________. a. Diversity factor alone increases. b. Both diversity factor and load factor increases. c. Only load factor increases. d. Both diversity factor and load factor decreases.
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13) What is the diversity factor? a. A ratio of kWh generated to the product of plant capacity and the number of hours for which the plant is in operation. b. The ratio of sum of individual maximum demands to the maximum demand on power stations. c. The ratio of actual energy produced to the maximum possible energy. d. The ratio of maximum demand on the power station to the connected load.
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14) What is operating value of diversity factor? a. Greater than unity b. Less than unity c. Always more than unity d. Normally more than unity
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15) Diversity factor is helpful in computing which of the following factors? a. Plant capacity b. Average load c. Units generated (kWh) d. Peak demand
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16) A large diversity factor of the load in a power system a. Reduces the installation cost. b. Increases the installation cost. c. Does not affect the installation cost. d. None of the above
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17) What is the result of the product of diversity factor and maximum demand? a. Average demand b. Sum of consumers maximum demand c. Installed capacity d. Generated power
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18) Maximum demand on the power system is a. Sum of the maximum demands of all its consumers. b. Greatest average load in a specified time. c. Peak value of load in a specified time. d. All of the above.
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19) What is demand factor? a. Average load to maximum demand. b. Maximum demand to connected load. c. Connected load to maximum demand. d. Maximum demand to average load.
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20) What is the value of demand factor? a. Greater than unity. b. Less than unity. c. Always more than unity. d. Normally more than unity.
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