Electrical Power Generation MCQs Part 12 The major loss in steam power station occurs in The major loss in steam power station occurs in: Boiler Condenser Economizer Superheater Correct answer: 2. Condenser Thermal efficiency and electric efficiency of a generation plant are 31.3% and 86% respectively, the overall efficiency of power plant is Thermal efficiency … Read more
Power System MCQs Part 8 Effect of increasing gating angle in a thyristorised controlled reactor is to Effect of increasing gating angle in a thyristorised controlled reactor is to: Decrease power loss in thyristor controller Decrease power loss in the reactor Make current wave form less sinusoidal All of these Correct answer: 4. All of … Read more
Power System MCQs Part 7 Reactance relay is generally preferred for protection against Reactance relay is generally preferred for protection against Earth faults only Phase faults only None of these Correct answer: 1. Earth faults only The most economic load on an underground cable is The most economic load on an underground cable is Greater … Read more
Power System MCQs Part 6 The reactance relay is The reactance relay is Voltage restrained directional relay Voltage restrained over-current relay Directional restrained over-current relay None of the above Correct answer: 3. Directional restrained over-current relay I and T are the line current and the torque respectively when DOL starter is used, these quantities when … Read more
Power System MCQs Part 5 The symbol for complex power is The symbol for complex power is: P Q S R Correct answer: 3. S Generally motor devices account for what percentage of power system load Generally motor devices account for what percentage of power system load 10% 30% 70% 99% Correct answer: 3. 70% … Read more
Transformer MCQs Part 2 Iron losses are negligible during short-circuit test of transformer since Iron losses are negligible during short-circuit test of transformer since The current on secondary side is negligible Full-load current is not supplied to the transformer The voltage on secondary side does not vary The voltage applied on primary side is low … Read more
Transformer MCQs Part 1. The value of flux involved in the EMF equation of a transformer is The value of flux involved in the EMF equation of a transformer is Average value Maximum value Rms value Instantaneous value Correct answer: 2. Maximum value No-load current in a transformer No-load current in a transformer Lags behind … Read more
Basic Electrical Engineering MCQs Part 2 A kettle is rated 230 V, 20 kW AC. The value 230 V is A kettle is rated 230 V, 20 kW AC. The value 230 V is: Average Voltage Peak Voltage RMS Voltage None of the above Correct answer: 3. RMS voltage For same peak value which of … Read more
Basic Electrical Engineering MCQs With rise in temperature, the specific resistance of metallic conductor _________ With rise in temperature, the specific resistance of metallic conductor _________ Increases Decreases Remains the constant None of these Correct answer: 1. Increases The SI unit of conductivity is The SI unit of conductivity is: mho/m mho-m ohm-m ohm/m Correct … Read more
Power System MCQs Part 4 The basic unit of energy is The basic unit of energy is: joule watt joule/s watt/s Correct answer: 1. joule The thermal efficiency and electrical efficiency of a power plant are 33% and 88% respectively, the overall efficiency of power plant is The thermal efficiency and electrical efficiency of a … Read more