Electric Traction Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction? Series parallel operation of motors All of the listed here Reduced current method Tap changing control of transformer Series parallel operation of motors All of the listed here Reduced current method Tap changing control of transformer ANSWER DOWNLOAD EXAMIANS APP
Electric Traction For three-phase induction motors which of the following is the least efficient method of speed control? Cascade control Rheostat control Pole changing Combination of cascade and pole changing Cascade control Rheostat control Pole changing Combination of cascade and pole changing ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Speed-time curve of main line service differs from those of urban and suburban services on following account It has longer coasting period Accelerating and braking periods are comparatively smaller It has longer free running period All of the listed here It has longer coasting period Accelerating and braking periods are comparatively smaller It has longer free running period All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Electric Traction In India, electrification of railway track was done for the first time in which of the following years? 1940-1942 1920-1925 1935 - 1938 1925 - 1932 1940-1942 1920-1925 1935 - 1938 1925 - 1932 ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Suri transmission is Mechanical electrical Hydro mechanical Hydro pneumatic Electrical pneumatic Mechanical electrical Hydro mechanical Hydro pneumatic Electrical pneumatic ANSWER DOWNLOAD EXAMIANS APP
Electric Traction When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when Degree of curvature is more Both of the listed here None of the listed here Wheel base of axles is more Degree of curvature is more Both of the listed here None of the listed here Wheel base of axles is more ANSWER DOWNLOAD EXAMIANS APP
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