Nate Core Certification Exam Questions with Certified Answers Graded A+

which of the following causes objectionable in Duct Systems? - Answer: Excessive Velocity Before beginning any electrical checkout procedure, what step must always be taken after the equipment disconnect or circuit breaker has been turned off? - Answer: Check For the presence of voltage which of the following ceiling types could increase the condition, space compared to a fan-ceiling ? - Answer: Insulated when measuring temperature rise why is it important to factor in a radiant heat? - Answer: It increases the value. When placing a rooftop unit a technician must... - Answer: Check the load bearing capacity of the roofs construction. what can cause outdoor unit sound to be objectionable to the customer? - Answer: Equipment location. when working with chemical solvents a technician should preview.... - Answer: Safety data sheets. The frame of an electric motor is grounded to..... - Answer: Maintain the frame at zero potencial. J94 is what? - Answer: Burner ( c ) what is Dew Point? - Answer: The temperature to which air must be cooled to become saturated with water vapor. The Primary purpose for bringing outdoor air into a residential air distribution system is to ... - Answer: Equalize pressure between the inside and outside of a structure. According to the diagram, WHEN is the crankcase heater operating ? - Answer: If the contact compress are open. Pictorial wiring diagrams generally show what components? - Answer: In their approximate installed positions. How much heat is created by 1kw at 240v 3 faze? - Answer: 3413 what is the effect of the electron flowing through a coil wire? - Answer: Increased magnetic Field. using the diagram above what do lines A & B represent? - Answer: Line Voltage What type of heat can change the thermometer reading? - Answer: Sesible What tool is used to cut a hole through a metal sheet? - Answer: A Die Which meter setting should a technician use to determine whether or not a set of contacts are open in an energized circuit? - Answer: Volts According to the diagram what is the purpose of the "RC" component ? - Answer: To start and run compressor and fan motor. After disconnecting the power, A technician should measure resistance of an electrical component.... - Answer: After insulating the component. Technician working in blower motor, he should always... - Answer: Power down blower. Why is indoor air cleanliness necessary for comfort? - Answer: Affects health and general well being. The input side of a stepdown transformer is also properly called... - Answer: Prime side. Latent heat is the heat added or removed when a substance... - Answer: Change its physical state. Capillary tool should be cut to length with... - Answer: Pair of diagonal cutters Which of the following is an acceptable practice when selecting and using a screwdriver? - Answer: Use screwdriver for the specific type of screw type and fastening method for which it was designed. A particular right triangle has two equal sides, which is a? - Answer: 45 Degree right angle Which of the following is proper for the care of hand tools? - Answer: Clean and wipe them regularly . Lever type tubing benders are used for... - Answer: Soft copper tubing. The Federal Regulator agency with jurisdiction over the shipping labeling of refrigerants is... - Answer: Department Of Transportation.(D>O>T.) Refrigeration in high concentration should not be inhaled since they cause... - Answer: Heart irregularities or Unconsciousness. What is a ground Fault Circuit Interrupter (GFCI ) receptacle? - Answer: A receptacle that is used protect against electrical shocks from defective appliances and external cords. A ceiling which slopes upwards from the center of the room is referred as - Answer: Vaulted