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1) 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
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2) 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
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3) 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
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4) 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
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5) 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
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6) The expected useful life of an hydroelectric power station is around_________________? a. 15 years b. 30 years c. 60 years d. 100 years
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7) The load factor of domestic load is usually____________? a. 10 to 15% b. 30 to 40% c. 50 to 60% d. 60 to 70%
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8) 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
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9) 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
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10) The area under a load curve gives__________? a. average demand b. energy consumed c. maximum demand d. none of the above
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