Seg 5

A 30-Ω resistor is connected to a 4-V supply. How many watts will this resistor have to dissipate?

0.533

A resistor has color bands of brown, black, black, brown, brown, which is "1kΩ" of resistance.. what if we replace the resistor with a new resistor with colors brown, black, black, and the fourth and fifth band to red, and silver. What is the resistance and tolerance of the new resistor?

10kΩ, 10%

Class 2 circuit conductors shall be insulated to a maximum of _________.

150V

A power-limited Class 3 power supply must never exceed _________.

150V, 100VA

The overcurrent protection device for a Class 1 circuits may be rated to

167% of the power supply rating

A resistor has color bands of red, violet, brown, and gold. What is the resistance and tolerance of the resistor?

270 Ω, 5%

The rating on power-limited tray cable should be rated for_____ V and not less than _______ AWG

300V, 22 AWG

A multiple station alarm is ______.

A single station alarm is capable of being interconnected to one or more additional alarms, so actuation of one causes others to operate.

_______________ type systems have the ability to locate and pinpoint the origin of an alarm signal by device type ?

Addressable

The organization, office or individual responsible for approving equipment, materials, and installation procedures, is the ________.

Authority Having Jurisdiction

What class fire alarm system uses a two wires followed by an end of line device?

B

What sets a fire alarm system from a _______ system, is that once it is turned on for operation, it will never have to be turned off, unless repairs will be needed.

Burglar Alarm

Vertical lines in the margins of the National Electrical Code® denote ________.

Changes in the current NEC

Class 2 circuits may be installed in the same enclosure or cable with conductors of Class 3 circuits provided

Circuit voltages are not above 150V

____________ _________ Type device, is a device that requires the user to first break a protective barrier before the device can be actuated ?

Double Action

The ________________ is a device used to monitor the presence of power in a building in a class A circuit ?

End Of Line Relay

A __________ ___________ volume type device will reset as internal temperatures decrease to less than the calibrated trigger level of the device

Expanding Liquid

A _____________ type device responds when an internal detecting element reaches a predetermined set temperature point ?

Fixed Temperature Detector

What Type of detector technology is non restorable?

Fused Heat Detectors & Fusible Links

Which type of device is designed to detect abnormally high temperatures within a given space or area?

Heat Detector

The fire alarm system uses many cables, for survivability, one such cable has solid copper conductors, insulated with magnesium oxide, covered over by a rigid copper sheath, this cable is called a(n).

MI cable

Which code is used for both general electrical installations and for fire alarm installations?

N.F.P.A 70

The National Electrical Code® is also referred to as _________.

NFPA 70

______________ systems are privately own and operated by property owners of the protected premises

Proprietary Station

Class 2 or Class 3 audio circuit conductors in accordance with section 640.9 of the NEC®, __________ occupy the same cable or raceway with other Class 2 or Class 3 remote control or signaling circuits

Shall not be permitted to

What describes the ability of conductors to maintain operation for a period of time?

Survivability

What is the intended purpose of a fire alarm system?

To protect life first and property is secondary

Which is the primary purpose of Duct Detectors?

To shut down any airflow equipment when smoke is detected

Specially designed ______________ are solid state devices that produce a changing output current based on shifting temperature of the device ?

Transistors

Service type ___________ indicate watchman supervisory devices, such as fire watchman and guard tour checking stations

WS

Smoke Detectors will be connected to the fire alarm panel.

Yes as first line of defense, either Ionization or Photo electric type.

Control wiring should be separated from electric light and power conductors because_____?

You lower the possibility of unwanted electrostatic or electromagnetic noise interference on the lines.

Ceiling-mounted smoke detector should not be located ____________

all the above

A resistor made from a compound of carbon and resin bonding material is the _____ resistor.

composition carbon

Resistors which have only one ohmic value are called _____ resistors.

fixed

What is true about a CL2R labeled cable?

it is class 2 rated

when a thermistor overheats, what do you do to get it working?

it will automatically rest when temp. decreases to its normal temp

A resistor made by applying a film of metal to a ceramic rod in a vacuum is the _____ resistor

metal film

Low-voltage, low-current circuits are used to control high-voltage, high-current systems.

none of the above

A variable resistor with three terminals is called a

potentiometer

In a circuit that has very little resistance, almost any applied voltage will result in huge amounts of current. This is called a _____ circuit.

short

___________ circuits are categorized as circuits that activate notification devices.

signaling

When resistors are manufactured, the processes are not perfectly exact. Each resistor may be slightly different from the next one. The plus and minus limits of a resistor's marked value is called the

tolerance

A resistor whose values can be changed over a range of values is called a _____ resistor.

variable

When two or more resistors are connected in series across a voltage supply, each of the resistors will have a voltage across it. The resistor network is known as a

voltage divider