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FDNY Z51 EXAM REAL EXAM QUESTIONS AND VERIFIED ANSWERS LATEST VERSION
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FDNY Z51 EXAM REAL EXAM QUESTIONS AND VERIFIED ANSWERS LATEST VERSION
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FDNY Z51 EXAM WITH ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS 2024 On an operating centrifugal compressor refrigerant unit, the refrigeration engineer notices that the compressor is short -cycling. The unit is using the low -side float valve as a metering device. Of the following requirements, this would indicate that A) the system is undercharged with refrigerant . B) the system is overcharged with refrigerant. C) an inspection should be made for a dirty and partially plugged discharge line. D) the compressor wiring should be inspected. - ANSWER✔✔A) the system is undercharged with refrigerant. What should be done to prevent accidental activation of smoke detectors during hot work operation? A) Place fire alarm system out of service, notify the Central Watch Station and provide fire watch. B) Remove the batteries from the smoke detectors. C) Cover the smoke detectors with plastic bags. D) Inform the Central Station to ignore any fire alarm signal during the hot work operation. - ANSWER✔✔A) Place fire alarm system out of service, notify the Central Watch Station and provide fire watch. Under normal conditions, the refrigerant enters the compressor as a A) low -pressure, superheated vapor and leaves as a high -pressure vapor. B) high -temperature vapor and leaves as a low -pressure vapor. C) low -pressure, superheated vapor and leaves as a high -pressure, saturated liquid. D) low -pressure vapor and leaves as a high -pressure saturated vapor. - ANSWER✔✔A) low -pressure, superheated vapor and leaves as a high -pressure vapor. The total amount of heat to be removed from the refrigerant in a condenser equals the heat picked up in the A) evaporator plus the heat of compression . B) evaporator. C) evaporator less the heat given up in the muffler. D) evaporator plus the heat of included non -condensable. - ANSWER✔✔A) evaporator plus the heat of compression. Which of the following requires a FDNY permit? A) Battery system. B) Refrigerating system. C) Standpipe system. D) Sprinkler system. - ANSWER✔✔B) Refrigerating system. When must the Fire Department be notified that a fire protection system is out of service? A) The manual pull alarm station in the lobby will be out of service for 4 hours. B) Four sprinkler heads on a same floor of your building will be out of service for 2 hours. C) The sprinkler system will be out of service on 1st and 2nd floors . D) The fire alarm system is out of service in the refrigerating system room for g hours. - ANSWER✔✔C) The sprinkler system will be out of service on 1st and 2nd floors. Hot work authorizations are issued by A) a Responsible Person designated by the Building Owner . B) a Building Department inspector. C) a FDNY inspector. D) the Building owner's insurance company. - ANSWER✔✔A) a Responsible Person designated by the building owner. Insecticidal fogging operations are hazardous because chemicals A) are corrosive. B) are water -reactive. C) may be toxic. D) are highly unstable. - ANSWER✔✔C) may be toxic. Where is emergency power not required according to code? A) Fire pumps. B) High rise elevators. C) Egress illumination. D) Data centers . - ANSWER✔✔D) Data centers. A technician shows up to service the fire alarm panel in your building. What COF qualifications must he/she have? A) A Q -01/Q -99 Certificate of Qualification holder who is designated by the building owner. B) A certified Fire Safety Director who is designated by the building owner. C) A S -95 Certificate of Fitness holder who is employed by a FDNY certified company.The benefits of buying summaries with Stuvia:
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