Electrician Practice Tests

A Differential relay measures the vector difference between …………………….

If a motor is connected on 240 Volts electrical circuit, which of the following disconnecting switch is used?

For a limited load having only one 2-wire branch circuit, what is the acceptable service equipment is required?

A Single family house that has a initial computed load of 10 kW or more should have a minimum ………………… amp 120/240 – volt 3-wire service supplied by three wires.

The corona starting voltage can be increased by:

A 2-Pole Breaker occupies twice as the space of a single pole breaker.

Which is the suitable breaker to protect a 240 volt circuit?

One Horse Power (hp) is equal to ……….

When the motor is overloaded, its …………………

A 100 W fan has a normal frequency of 60 Hz , at 120 Hz supply the power drawn will be:

Which of the following circuits shall not be connected to system containing trolley wires?

The branch circuits having rating in excess of ……………………. shall require heavy duty type lamp holders.

What is the smallest aluminum wire size allowed for service entrance conductors?

Which of the following instrument is used to measure the resistance in the circuit directly?

In which of the following the panel boards must be enclosed?