Electrician Practice Tests

If a single phase motor full load current is 30 Amperes, what is the dual element fuze size to be used as motor branch circuit short circuit protection?

A singe motor is driving 40 volts generator having an over current protection. if the same can also protect the generator when the generator is delivering not more than …………………. percentage of its full load current

What is the derating factor for 4 to 6 conductors grouped in a raceway or cables?

For a residence having a single branch circuit with a limited load what is the minimum size of service is required?

Class II locations are those that are hazardous because of the presence of ………………….

Four conductors are made up of four different metals with same dimensions, which of the following metal will offer lower resistance for flow of current?

In a Electrical circuit , the lamp resistance is 260 ohms and the ammeter in circuit indicates 5mA. What is the power dissipated in lamp?

Fuel cell systems should supply emergency load for not less than ……….. hours

Field installed secondary circuit winding for electrical signs of 1000 volts or less shall have a conductor size not less than …………………

When an electrical circuit tested with ohmmeter, a open circuit is indicated by a reading of ………………….

What is the maximum continuous load that can be connected to 240 volts 10 ampere branch circuit?

If 30 ampere or less snap switches are equipped in panelboards, they must be protected not in excess of:

How many watt-meters are required to measure the power in balanced three phase star connected circuit?

If a DC power supply is supplied to primary of a transformer then …………………….

The following lamp holder is approved to be installed in either a damp or wet location?

If a 30 amperes snap switch is used as disconnecting means of a 3-horse power motor, what shall be the maximum full load current of the motor?

What must be provided for all working spaces above service equipment, switchboards and panel boards?

The voltage shall not be greater than ………….. to supply listed electrical discharge lightening in dwelling units, hotels and motels?

How many number of service disconnects per service are allowed to be grouped in any one location?

What is the minimum standard rating for fuses and inverse time circuit breakers?