DC Motors D.C. generators are normally designed for maximum efficiency around All of these Rated voltage Full load Rated r.p.m. All of these Rated voltage Full load Rated r.p.m. ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Bent shaft Worn bearings Open armature coil Too much brush tension Bent shaft Worn bearings Open armature coil Too much brush tension ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the supply voltage for a D.C. motor is increased, which of the following will decrease? All of these Full-load current Starting torque Operating speed All of these Full-load current Starting torque Operating speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors The starting resistance of a DC motor is generally 1000 Ω Around 500 Ω Infinitely large Low 1000 Ω Around 500 Ω Infinitely large Low ANSWER DOWNLOAD EXAMIANS APP
DC Motors By putting controller resistance in series with the armature of a dc motor, we can obtain speeds None of the listed here Below the normal speed only Above as well as below the normal speed Above the normal speed only None of the listed here Below the normal speed only Above as well as below the normal speed Above the normal speed only ANSWER DOWNLOAD EXAMIANS APP
DC Motors In which of the following tests only one motor is required? Hopkinson's test Field's test Swinburne's test Brake test Hopkinson's test Field's test Swinburne's test Brake test ANSWER DOWNLOAD EXAMIANS APP
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