The process of adding impurities to a pure semiconductor

An appliance, which is fastened or otherwise, secured at a specific location

The advantage of AC over DC incudes which of the following?

an electrical timer switch for lighting is normally connected in ___ with the lighting circuit being controlled

An electrical time switch for lighting is normally connected in ___ with the lighting circuit being controlled

The temperature of the shunt field motor increases from 20°C to 30°C after 3 hours of operation. This increase in temperature produces what effect on the behavior of the motor?

Which one refers to the generator’s mechanical driver?

This refers to department stores, supermarkets, shopping malls, office buildings, hotels, theatres, stadiums, condominiums, conventions, convention centers, restaurants and the like, used for business or profit

A cord connector that is supported by a permanently installed cord pendant shall be considered a (an) ____

An appliance that is not easily moved from one place to another in normal use is a _ appliance

All lights and any receptacles adjacent to the mirror(s) and above the dressing table counters in dressing rooms of theaters shall be controlled by wall switches installed in the

The definition of ambient temperature is ____

For open conductors of not over 600 volts, clearance from ground shall be __ mm, above finished grade where the supply conductors have a nominal voltage limited to 150 volts to ground and accessible to pedestrians only.

Conductors which supply one or more AC transformers or DC rectifiers are welders shall be protected by an overcurrent decide rate or set at not more than ___ percent of the conductor rating

What would be the advantage of 240 volts rather than 120 volts on a load with the same wattage?

An auxiliary gutter shall not extend a greater distance than ___ feet beyond the equipment which it supplements

PEE, REE and RME whose Certificate of Registration has been revoked may, after the lapsed of from the surrender thereof, be re-issued upon approval of the Commission.

A piece of electrical equipment that is designed to operate at alternate intervals of (1) load and no load; or (2) load and rest; or (3) load, no load, and rest is called __ duty.

When calculating the conductor fill for strut-type channel raceway with internal joiners the raceway shall be permitted to be filled to ___ percent of the cross-sectional area

Automatic device that operates at present values is known as ___.

Typical output of a lead acid cell.

The voltage produced by electromagnetic induction is controlled by ____.

Fire protective signaling circuits shall be grounded the only exception is Dc power-limited circuits having a maximum current of __ amperes

__ are permitted to protect motor branch circuit conductors from overload. I. Thermal relays II. Inverse time circuit breakers III. Time delay fuses

When more than one calculated or tabulated ampacity could apply for a given circuit length, the __ value shall be used.

Which of the following is standard size fuse?

A common fuse and circuit breaker works on the principal that ___

The wattmeter/s necessary to measure the power in the load of an unbalanced 3-phase, 4-wire system is __

The load in an electrical circuit is use to ___

An open coil can be detected by ___ reading

Boxes and fittings shl be ___ in a class III, Division * location

The input to a motor is 16,000 watts and the motor loses a total of 3,000 watts. The efficiency of the motor is most nearly

Branch circuits for heating and air conditioning equipment located on the elevator car shall not have a circuit voltage in excess of __ volts.

Sensitivity of the voltmeter is expressed in

The important function of a type S-fuse is ___

The wheatstone bridge method is used for accurste measurements of ___

The rating of a storage battery is expressed in __

When using compressed air to clean electrical equipment, the air pressure should not exceed 50 pounds. The main reason is higher pressures ___.

A switch or circuit breaker should disconnect the grounded conductors of a circuit ___

When thermal overload relays are used for the protection of poly-phase induction motors, their primary purpose is to protect the motors in case of ___.

all wiring must be installed so that when completed

A manufactured assembly designed to support and energize lighting fixtures that are capable of being readily repositioned is ___

A nameplate data that will tell whether or not the motor is allowed to develop more that its rated nameplate horsepower without causing deterioration of its insulation.

Hoist way is a ___ in which an elevator or dumbwaiter is designed to operate

Bussways rated over 600 volts shall have all conductor termination and connection hardware accessible for __. I. Maintenance II. Connection III. Installation

What is the VA input of a fully loaded 5hp 230 volt single-phase motor?

The maximum current a #12 THW copper conductor connected to a 20 amp circuit breaker would ever carry under any condition could be ___ amperes.

Which of the following motors does not have a commutator

The definition of a qualified person is ___.

On s delta connected 3Ø, 4-wire system the phase arrangement for the busbar with the highest voltage to ground is ____ .