Transformers If a transformer core has air gaps, then, _________ Hysteresis loss is decreased Reluctance of magnetic path is decreased Magnetising current is greatly increased Eddy current is increased Hysteresis loss is decreased Reluctance of magnetic path is decreased Magnetising current is greatly increased Eddy current is increased ANSWER DOWNLOAD EXAMIANS APP
Transformers In case of 3-phase induction motors, plugging means interchanging two supply phases for quick stopping pulling the motor directly on line without a starter locking of rotor due to harmonics starting the motor on load which is more than the rated load interchanging two supply phases for quick stopping pulling the motor directly on line without a starter locking of rotor due to harmonics starting the motor on load which is more than the rated load ANSWER DOWNLOAD EXAMIANS APP
Transformers In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of less than 15 A more than 15 A 15 A None of these less than 15 A more than 15 A 15 A None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Potential transformer Auto transformer Power transformer Current transformer Potential transformer Auto transformer Power transformer Current transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The transformer that should never the secondary open circuited when primary is energised is _______ Auto transformer Power transformer Voltage transformer Current transformer Auto transformer Power transformer Voltage transformer Current transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural oil cooling is used for transformers up to a rating of 500 kVA 3000 kVA 250 kVA 1000 kVA 500 kVA 3000 kVA 250 kVA 1000 kVA ANSWER DOWNLOAD EXAMIANS APP
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