What is a plenum - Study guides, Class notes & Summaries

Fiber Optics Exam Questions and Correct Answers (Verified Answers) Newest Version Why does Grades Index fiber use numerous concentric layers of glass, - Answer To prevent modal dispersion What is the optical fibers cladding bonded to during the assembly process? - Answer Ferrule A fiber optic cable that is "fire retardant and low smoke" is called what according to the NEC? - Answer Plenum What type of fiber has an aqua jacket? - Answer OM3 and OM4 Mm laser optimized multimod...

NATE Gas Heating Exam with Complete Solutions 100% Verified Graded A+ In a modern gas furnace, the component that separates the combustion gases from the supply air is the ______. a. gas valve b. heat exchanger c. inducer fan d. plenum box - Correct Answer b (heat exchanger) What type of furnace moves warm air through the conditioned space without a fan? a. Gravity b. Horizontal c. Lowboy d. Upflow - Correct Answer a (Gravity) Furnace heat exchangers generally are made of ______. ...

Fire Alarm TFM12 What does PLFA stand for? - correct answer Power Limited Fire Alarm What does NPLFA stand for? - correct answer Non-Power Limited Fire Alarm What material must NPLFA circuit conductors be made from - correct answer Only solid or stranded copper is permitted What is a single station detector? - correct answer Battery powered smoke detectors that do not communicate off premises. What is a multiple station detector? - correct answer Mains powered smoke detectors with b...

OKC Burglar Alarm/Fire Exam Questions And Correct Answers New Update What is the correct wiring configuration on a household fire alarm system initiating circuit? - Answer -Series with EOL supervision In a residential alarm system, fire detection devices must - Answer -Cause an alarm that is clearly audible in all bedrooms A characteristic of alterating current is that it - Answer -Changes polarity 60 times per second NFPA 101 is often referred to as the - Answer -Life Safety Code ...

Shielded Twisted-Pair (STP) cabling reduces what kind of interference? (Select 2 answers) Jitter Signal attenuation Crosstalk EMI Signal latency - Answer-Crosstalk EMI Which of the following answers refer(s) to UTP cabling? (Select all that apply) Twisted-pair copper cabling Used in Ethernet networks and telephone systems Low cost and ease of installation Takes advantage of additional protective cover reducing signal interference from outside sources Coaxial cabling Not surrou...

TFM 12 Fire Alarm Technical Questions and Answers Graded A+ Does a fire hood system and a kitchen need to be monitored by the fire alarm system? Yes What does P.L.F.A stand for? Power Limited Fire Alarm What does N.P.L.F.A stand for? Non-Power Limited Fire Alarm What is the difference between P.F.L.A and N.P.F.L.A? an N.P.L.F.A can operate at up to 600v, and the power output isn't limited a P.L.F.A has the voltage and power limited by a listed power source. What material must N.P.F.L.A cir...

Fiber Optics Practice Test Questions and Answers All Correct What is the optical fibers cladding bonded to during the assembly process? - Answer- Ferrule A fiber optic cable that is "fire retardant and low smoke" is called what according to the NEC? - Answer- Plenum What type of fiber has an aqua jacket? - Answer- OM3 and OM4 Mm laser optimized multimode What does the gel in a loose tube fiber optic cable protect the optical fiber from if the jacket falls? - Answer- Moisture from ...

Fire Alarm TFM12 questions & answers rated A+ 2024/2025What does PLFA stand for? - correct answer Power Limited Fire Alarm What does NPLFA stand for? - correct answer Non-Power Limited Fire Alarm What material must NPLFA circuit conductors be made from - correct answer Only solid or stranded copper is permitted What is a single station detector? - correct answer Battery powered smoke detectors that do not communicate off premises. What is a multiple station detector? - correct answer...

HVAC Masters Test Questions and Answers Already Passed What is the minimum size of drier vent 4 inches Can a 2x4 studding be used for plenum or return chases or duct No Appliance in a public garage should have a minimum clearance from the floor 8 feet Duct insulation should have a smoked developed index of no more than 50 Duct insulation material should have a minimum flame spread rating of 25 What is the maximum temperature of gypsum board 125 degrees Fahrenheit What is ...

NICET Prep : Fire Alarms 2024 Questions And Revised Correct Answers Assembly Occupancy's are buildings used for gathering of _____ or more people for deliberation, worship, entertainment, eating, drinking, amusement, awaiting transportation or similar. - Answer -50 people Class 3 wiring installed under roof decking is required to be at least __ inches below the roof decking - Answer -1.5 Inches The minimum length of free conductors at outlet boxes is - Answer -6 Inches A ________ __...