Untitled Deck Flashcards
What is the maximum spacing in corridors?
No more than 100 feet apart.
What is the minimum number of cycles a voice alarm system must report for an evacuation procedure?
2
What is the minimum required number of smoke alarms in a single story dwelling unit with two bedrooms not located near one another?
4
What is the minimum spacing for heat detectors used within a single family unit?
50’
Heat detectors must be listed or approved.
What is a privately owned and monitored alarm system classified as?
Proprietary system
What is a decibel?
1/10th of a bell
What must notification appliances of a local protective signaling system include on their nameplate?
Electrical requirements and rated audible or visible performance.
What is the ambient sound level that requires a visible notification device in a fire alarm system?
Greater than 105 dBa
What is the maximum blink rate on a strobe light on a notification appliance per second?
2
What is the maximum interval that a fire alarm signal is allowed at the console?
15 seconds
What is the detector that reacts to convected thermal reaction?
Heat detector
What type of system are components that are non fire alarm but connected to fire alarm components considered?
Combination system
What is the minimum distance pad mounted equipment must be from fire hydrants?
4 feet
How is electrical power measured?
In Watts
What is the term for a frequency that has been amplified to four frequencies?
Frequency multiplexing
What type of network is not considered multipoint?
Point to point
What is the result when a company ties together different devices such as computers and printers?
A network
Which part of a power supply converts electrical current from AC to DC?
Rectifier
What is the standard impedance of a video coaxial cable?
75 ohms
What is the electrical path called when telecom wire is grounded on each end?
Ground loop
What will a voltmeter test all of the following EXCEPT?
Power
What are the disadvantages of fiber optics over copper?
Cost
What is the measurement of the amount of signal for fiber optics?
Bandwidth
Why does light L not come on when switch S1 is in the on position and voltage across S1 is 120 volts?
The lamp is good but the switch does not make contact.
Which material is commonly used as an anode?
Magnesium
What does a length of coax terminated at one end with a 50 ohm terminator and 0 ohms resistance at the other end indicate?
Cable continuity is shorted.
What is the potential difference between any two points in a circuit?
Voltage
What does Ohm’s law state about current and resistance?
Current is inversely proportioned to the resistance.
