A three-phase generator is connected to three 90 Ω load resistors. Each coil produces 120 V ac. A common neutral line exists. The current that flows through the common neutral line will be 0 2.66 A 3.99 A Correct answer: 1. 0
A single-phase sinusoidal voltage of 120 V is connected to a 90 Ω load. Current in the circuit is 1.33 A 13.5 mA 5.87 A 87.95 mA Correct answer: 1. 1.33 A
For a Y-connected generator, there is a 120° difference between each line voltage and the nearest phase voltage FALSE TRUE Correct answer: 1. FALSE
A two-phase generator is connected to two 90 Ω load resistors. Each coil generates 120 V ac. A common neutral line exists. The current flowing through the common neutral line will be 1.05 A 1.52 A 1.77 A 2.97 A Correct answer: 3. 1.77 A
A simple three-phase generator comprises of three conductive loops separated by 120° FALSE TRUE Correct answer: 2. TRUE
A constant load power implies a uniform conversion of Current to voltage Electrical to mechanical energy Mechanical to electrical energy Voltage to current Correct answer: 2. Electrical to mechanical energy
Electrical Engineering MCQs on Synchronous Motor Part 14 If field circuit of an unloaded salient pole synchronous motor gets suddenly open-circuited then If field circuit of an unloaded salient pole synchronous motor gets suddenly open-circuited then Correct answer: 4. The motor stops The motor that is non self-starting The motor that is non self-starting Correct … Read more
Electrical Engineering MCQs on Synchronous Motor Part 13 In order to limit the operating temperature an electrical machine should have proper In order to limit the operating temperature an electrical machine should have proper Correct answer: 1. Current rating Generally, synchronous motors are of Generally, synchronous motors are of Correct answer: 3. Salient pole type … Read more
Electrical Engineering MCQs on Electrical Traction MCQs Part 2 The specific energy consumption of a train depends on The specific energy consumption of a train depends on Correct answer: 4. All of these The rate of acceleration on suburban or urban service is in the range The rate of acceleration on suburban or urban service … Read more
Electrical Engineering MCQs on Electrical Traction MCQs Part 1 For diesel locomotives the range of horsepower is For diesel locomotives the range of horsepower is Correct answer: 1. 1500 to 2500 Long distance railways utilize Long distance railways utilize Correct answer: 2. 25 kV single phase AC Tractive effort is required to Tractive effort is … Read more