Electrician Supervisor Interview Questions and Answers

Transformers do not work on DC because they rely on the principle of electromagnetic induction.

• Transformers operate based on the principle of electromagnetic induction, which requires a changing magnetic field.

• In AC (alternating current) systems, the current continuously changes direction, creating a changing magnetic field.

• The changing magnetic field induces a voltage in the secondary winding of the transformer, allowing for voltage transformation.

• In DC (direct current) syst...read more

Transformers have a rating in KVA because it indicates the maximum amount of power they can handle.

• KVA stands for kilovolt-ampere, which is a unit of apparent power.

• The rating in KVA helps determine the capacity of the transformer to handle electrical loads.

• It takes into account both the voltage and current, providing a measure of the total power capacity.

• For example, a transformer with a rating of 100 KVA can handle a maximum power of 100,000 volt-amperes.

• The KVA rating is i...read more