NC2 REVIEW SET B-2

The current is directly proportional to the voltage and inversely proportional to resistance.

• Lenz’s Law

• Power Law

• Faraday’s Law

• Ohm’s Law

Before adding or an altering an installation, you must ensure that

• Partially tightened

•  loosely installed

• safety precaution are allowed

• the power is alive

What amount of current will be drawn by incandescent bulb connected to a 115-volt circuit if its resistance is 264.5 ohms?

• 0.45 amps

• 0.43 amps

• 0.42 amps

• 2.3 amps

When measuring ballast resistance if it is defective or good, it is necessary that the source

• energized

• de-energized

• unloaded

• loaded

A circuit breaker is an electrical protective device that _________.

• protects electrical equipment from incoming spike voltage

• protects electrical equipment from surges and overloads

• breaks power flow when a very low voltage is encountered

• trips off when a very low current is encountered

The 24 hours protection for home and commercial building to monitor and access the video anytime anywhere on this device

• Fire Alarm System

• Building Remote Controller

• Telephone Monitoring Cabinet

• CCTV camera

The auxiliary device of CCTV that monitor the motion daily.

• camera

• recorder

•  monitor

• adapter

Which of the following is the input device?

• Door lock

• Exit Button

• Biometric Reader and Controller

• All of the above

A part of auxiliary device that capture live events and save as video files

• power splitter

•  camera

• monitor

• recorder

The minimum size of conduit commonly used in laying-out of auxiliary devices.

• ½” diameter

• ¾” diameter

• ½” PVC molding

• ¾” PVC molding