The usual test to find the efficiency of the traction motor is

Related MCQs

• A DC series motor is best suited for electrical traction because:
• A 440V, 20HP, 3phase motor operates at full load, 88% efficiency and 0.65 power factor lagging, the current drawn by motor is
• A 440V shunt motor has an armature resistance of 0.8Ω field reistnace of 200Ω . Find the back emf when giving an output of 7.46kW at 85 % efficiency?
• A 20HP DC motor has 89.3% efficiency at rated power. What are its total losses?
• If the back emf in a dc motor varnishes suddenly, then the motor:
• A thick wire is used in dc series motor field winding than that in dc shunt motor:
• A DC shunt motor is driving a constant torque load. On inserting an additional resistance in the armature circuit, the speed of the motor will:
• A flywheel is employed with a dc compound motor to reduce the peak demand, the compound motor should be:
• The shaft torque in a DC motor is less than total armature torque because of ____in the motor
• ____ motor is a variable speed motor.