Transformers are rated in - Study guides, Class notes & Summaries

Does a fire hood system and a kitchen need to be monitored by the fire alarm system? Answer - Yes What does PLFA stand for? Answer - Power Limited Fire Alarm What does NPLFA stand for? Answer - Non-Power Limited Fire Alarm What is the difference between PFLA and NPFLA? Answer - an NPLFA can operate at up to 600v, and the power output isn't limited a PLFA has the voltage and power limited by a listed power source. What material must NPFLA circuit conductors be made from? Answer - ...

For a given number of poles, which of the following determines the speed of an AC motor? Frequency The terminals of a motor can be identified using a battery and a(n) _____. voltmeter The stationary magnet of a DC motor is represented by the ______. field poles Any exposed live parts must be guarded if they are operating at ______. 50V or more between terminals The synchronous speed at which a four-pole, 60Hz induction motor operates is _____. 1,800rpm In ...

TFM 12 Fire Alarm Technical Question and answers 100% correct TFM 12 Fire Alarm Technical Does a fire hood system and a kitchen need to be monitored by the fire alarm system? - correct answer Yes What does P.L.F.A stand for? - correct answer Power Limited Fire Alarm What does N.P.L.F.A stand for? - correct answer Non-Power Limited Fire Alarm What is the difference between P.F.L.A and N.P.F.L.A? - correct answer an N.P.L.F.A can operate at up to 600v, and the power output isn't li...

HVAC Pretest BOMA Exam Questions With Accurate Answers. Two basic categories of chillers are the ___. a. Compression cycle and absorption b. purge and absorption c. absorption and lithium bromide d. purge and lithium bromide - answera. Compression cycle and absorption The five requirements for comfort are proper temperature, humidity, filtration, _____, and ventilation. a. circulation b. velocity c. . d. none of the above - answera. circulation The primary function of an expansion d...

What are the two primary purposes of fire extinguishers To extinguish incipient stage fires To control fires using nontraditional agents Class A involve paper, cloth, and rubber; represented as burning trash can beside a wood fire Class B involve gasoline, oil, and grease; represented as flame and a gasoline can Class C involve fuse boxes, circuit breakers, and transformers; represented as flame and electrical plug and socket Class D involve magnesium, titanium, and zirconium; represented ...

What is used to protect transformers or other devices supplied from power-supply conductors? - CORRECT ANSWER A. An overcurrent device not rated over 20 Amperes. 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 AN-SWER Solid or stranded copper What is a single station detector? - CORRECT ANSWER Batt...

Fire Alarm TFM 12 Exam Review What does PLFA stand for? - Power Limited Fire Alarm What does NPLFA stand for? - Non Power Limited Fire Alarm What material must NPLFA circuit conductors be made from - Only solid or stranded copper is permitted What is a single station detector? - Battery powered smoke detectors that do not communicate off premises. What is a multiple station detector? - Mains powered smoke detectors with battery backup that are linked together, so that if one un...

Ignition transformers produce a voltage of about 10,000 V, while the ____ produce voltages of about 14,000 V correct answersSolid-state igniter ____ are designed and rated at 100 psig nozzle pressure. correct answersOil burner nozzles A common spray pattern for an oil burner ____ is a solid cone with heavy concentrations of oil in the center correct answersNozzle The ____ device shut the burner down in case the burner doesn't fire. correct answersStack switch The purpose of the cad ...

Electrician NCCER Questions and Answers (Already Passed) Latest Updated 2024/2025 | Graded A+. What is a dropout plate? Metal plate with a curve surface for cable to follow as it passes from the tray All of the following are common service voltages in the United States Except: 372/575 3- Phase, 4-wire What does a GFCI breaker do? Opens a circuit to prevent operation of an electrical device What will happen when one or more coils in a winding are grounded? The motor will automatically blow ...

What is used to protect transformers or other devices supplied from power-supply conductors? - ANSWER A. An overcurrent device not rated over 20 Amperes. What does PLFA stand for? - ANSWER Power Limited Fire Alarm What does NPLFA stand for? - ANSWER Non-Power Limited Fire Alarm What material must NPLFA circuit conductors be made from? - ANSWER Solid or stranded copper What is a single station detector? - ANSWER Battery powered smoke alarms that do not communicate off premises. Wha...