Questions and Answers
What is the maximum interval for testing a device inaccessible due to excessive height?
18 months
What is the acceptable maximum mounting height from the floor for a wall-mounted fire telephone appliance?
66 inches
Elevator lobby smoke detectors shall be mounted within a maximum distance of?
21 feet
What is the minimum distance an aerial lift operator shall maintain from power lines with voltage of 600 volts and lower?
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Under what condition shall the use of unprotected EMT be permitted?
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According to NFPA 70, what is the maximum unsupported length of 1/2-inch flexible metallic conduit?
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What is the maximum bend (in degrees) permitted in a conduit run between outlet boxes?
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What is the minimum acceptable time for secondary power to operate the voice evacuation systems when the primary power is disconnected?
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A riser room temperature switch should activate when the temperature falls below which level?
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According to NFPA 72, what is the maximum sound pressure level permitted in a space with notification appliances?
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What is the minimum interval for testing a single-station smoke detector in multifamily units?
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Where should a technician install a detector in relation to a beam that is less than 12 inches deep?
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Where should an existing fire alarm cable in a drop ceiling be spliced to comply with NFPA 70?
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What function shall be tested for each newly installed smoke detector?
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How many heat detectors are required in an 180-foot long corridor with a smooth 10-foot ceiling?
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At what height must cables be physically protected when being installed within an exposed ceiling?
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When shall smoke detectors be installed during the construction process?
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What is the maximum distance intermediate metal conduit shall be secured from an outlet box?
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The requirement forbidding fire alarm circuits from being T-tapped is intended to prevent which type of malfunction?
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What is the maximum operating temperature of TW insulation?
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Which type of meter is used to measure the current draw of a strobe circuit?
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What is an acceptable document for finding information on spacing of video imaging smoke detection systems?
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When pulling multiple cables through a junction box, what is the minimum length of wire an installer must leave for splicing?
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Which three of the following conditions are symptoms of a heart attack? (Select all that apply)
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To what water temperature should sprinkler water storage containers be supervised to indicate?
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According to NFPA 72, what is the minimum separation between outgoing and returning conductors for a Class A loop that is horizontally placed down an 8-foot-wide corridor?
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According to NFPA 72, what is the minimum time period that a public emergency alarm reporting system shall operate its emergency power source?
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Where shall employers post a safety data sheet?
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During an acceptance test, what method can be utilized for testing a sprinkler waterflow switch?
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When technicians are working in a plant, where should they learn about the plant's safety regulations?
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Where is at least one telephone or jack required to be installed in a fire communication system?
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Who is responsible for fire alarm system testing and maintenance?
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In a protected premises with a 40-foot long by 15-foot wide room having a smooth ceiling, what is the minimum quantity of smoke detectors that shall be required?
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What is the correct way to connect a meter to measure a horn strobe circuit current draw?
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Which plans include fire detection system details?
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How many inches below the finished ceiling should wall-mounted audible signal appliances be mounted?
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What is the recommended first step in treating a suspected leg fracture?
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How often shall alarm notification appliances be tested?
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When the outgoing and return conductors enter or exit notification circuits, how far can the conductors run in the same cable assembly?
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Which part requires special handling or disposal?
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What is the minimum acceptable size of conductors for multi-conductor cables?
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Which type of detector is recommended for protecting atriums and similar open spaces?
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Which type of fire alarm key blank must be used for a run installed in a plenum space?
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What are the current courses of action if a technician notices that a step is missing from a ladder?
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What is the minimum size for EMT?
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What is the maximum size for EMT?
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How often must EMT be securely fastened in place?
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What is the definition of a continuous load?
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What is ampacity?
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What device provides protection from the effects of arc faults?
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What are the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s)?
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What is overcurrent?
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What is the maximum height for initiating a pull box?
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How long shall a secondary power supply's capacitance last when primary power is off?
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What is the duration for a secondary power supply for in-building mass notification system (MNS)?
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What is the duration for a secondary power supply for in-building fire emergency voice/alarm communications?
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Within what time frame shall trouble signals and their restoration to normal be indicated?
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Which circuit class is a fail-safe circuit?
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Which circuit class is not monitored for integrity?
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How is a Class B circuit different from a Class A circuit?
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Monitoring for integrity shall not be required for the interconnection between enclosures containing control equipment located within?
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What is the formula for calculating current (I) in terms of voltage (E) and resistance (R)?
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What is the formula for calculating resistance (R) in terms of voltage (E) and current (I)?
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What is the formula for calculating voltage (E) in terms of current (I) and resistance (R)?
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What is K for copper at 167 degrees F?
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What is K for aluminum at 167 degrees F?
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What is the voltage drop formula for single-phase circuits?
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What is the voltage drop formula for three-phase circuits?
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What is the total current for a series circuit?
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What is the total voltage for a series circuit?
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What is the total resistance for a series circuit?
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What is the total current for a parallel circuit?
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What is the total voltage for a parallel circuit?
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What is the total resistance for parallel circuits?
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What is the total resistance when current and voltage are unknown?
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What is the formula for total resistance of only 2 resistors in parallel?
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What is the definition of a detector?
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What is beam construction?
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How soon shall actuation of alarm notification appliances occur?
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How soon shall indication and restoring of self-restoring supervisory devices occur?
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What is the maximum air sample transport time from the farthest sampling port to the detector?
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What is the minimum distance between raceway entries inside the box?
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What is the maximum distance vertical runs of a metal wireway shall be securely supported?
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What is the maximum distance a metal wireway shall be supported horizontally?
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What are Class 1 location hazards?
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What are Class 2 location hazards?
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What are Class 3 location hazards?
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What defines Class 1 Division 1?
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What defines Class 1 Division 2?
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What defines Class 2 Division 1?
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What defines Class 2 Division 2?
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What defines Class 3 Division 1?
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What defines Class 3 Division 2?
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What is Group A?
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What is Group B?
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What is Group C?
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What is Group D?
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What is Group F?
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What is Group G?
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Study Notes
Fire Alarm System Standards and Testing
- Devices must be tested at least every 18 months if inaccessible due to height.
- Wall-mounted fire telephone appliances should be mounted no higher than 66 inches.
- Elevator lobby smoke detectors must be placed within 21 feet of the door's center-line.
- Aerial lift operators need to keep a 10-foot distance from 600-volt power lines.
- Unprotected EMT is allowed only when in direct contact with the earth.
Conduit and Cable Regulations
- The maximum unsupported length of 1/2-inch flexible metallic conduit is 4 1/2 feet.
- A maximum bend of 360 degrees is permitted in conduit runs between boxes.
- Smoke detectors in multifamily units must be tested annually.
- Detectors in beam constructions (less than 12 inches deep) should be installed at the beam's bottom.
Electrical Connections and Safety
- Riser room temperature switches activate below 40°F.
- Notification appliances' maximum sound pressure level is limited to 110 dBA per NFPA 72.
- Installers must ensure at least 6 inches of wire for splicing when pulling multiple cables through junction boxes.
- After construction, smoke detectors should be installed following final clean-up.
Fire Detection and Emergency Power
- Secondary power must sustain voice evacuation systems for a minimum of 15 minutes during alarm conditions.
- Fire alarm circuits cannot be T-tapped unless specified by the manufacturer to maintain monitoring integrity.
- Sprinkler storage must be supervised to indicate water temperature drops below 40°F.
- Public emergency alarm systems require a minimum operational time of 10 minutes on emergency power.
Fire Alarm Components and Requirements
- Smoke detectors should be placed strategically to protect spaces adequately, with the minimum number specified depending on room size.
- A multimeter is utilized to measure current draw of strobe circuits.
- Fire alarm system maintenance and testing is the responsibility of the property owner.
Electrical Theory and Calculations
- Key electrical formulas include Ohm's Law: I (Amperes) = E (Voltage) / R (Resistance), and voltage drop calculations for single-phase: Vd = (2K x L x I) / Cm.
- Class A circuits provide redundancy; Class B circuits do not have a redundant path, stopping operational capability at a single open.
- Class D circuits are considered fail-safe, while Class E circuits are not monitored for integrity.
Hazardous Location Classifications
- Class 1 locations involve flammable gases and vapors, while Class 2 refers to combustible dust, and Class 3 includes easily ignitable fibers.
- Class Division designations specify additional conditions, such as the regular presence of hazardous materials due to operations or equipment failure.
Miscellaneous Regulations
- Fire alarm systems require components to be installed within specific height guidelines (e.g., initiating pull boxes at a maximum height of 48 inches).
- Proper handling of hazardous components like lead-acid batteries is crucial for safety.
- Understanding and adhering to these safety regulations significantly impacts the efficient and safe operation of fire alarm systems.
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Description
Test your knowledge on fire alarm system standards and electrical safety regulations. This quiz covers essential guidelines for device testing, installation requirements, and safety distances in various environments. Ensure you are familiar with the latest standards to maintain safety compliance.