Electric Traction Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction? Reduced current method Series parallel operation of motors Tap changing control of transformer All of the listed here Reduced current method Series parallel operation of motors Tap changing control of transformer All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following drives is suitable for mines where explosive gas exists? Battery locomotive All of the listed here Steam engine Diesel engine Battery locomotive All of the listed here Steam engine Diesel engine ANSWER DOWNLOAD EXAMIANS APP
Electric Traction An ideal traction system should have Equipment capable of withstanding large temporary loads All of the listed here High starting tractive effort Easy speed control Equipment capable of withstanding large temporary loads All of the listed here High starting tractive effort Easy speed control ANSWER DOWNLOAD EXAMIANS APP
Electric Traction If the coefficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails? 0.26 0.46 0.16 0.35 0.26 0.46 0.16 0.35 ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The resistance encountered by a train in motion is on account of All of the listed here Friction at various parts of the rolling stock Resistance offered by air Friction at the track All of the listed here Friction at various parts of the rolling stock Resistance offered by air Friction at the track ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following is the voltage for single phase A.C. system? 220 v 220 V 11 kV 5 kV 220 v 220 V 11 kV 5 kV ANSWER DOWNLOAD EXAMIANS APP
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