NATE Q&A Exam Bundle

Calculate the air volume based upon these conditions: 90,000 BTUH output Return air temperature: 70F Supply air temperature: 110F a. 1,158 CFM b. 1,500 CFM c. 1,800 CFM d. 2,083 CFM d (2,083 CFM) When measuring CFM using temperature rise method, the furnace blower motor speed should be...

Refrigerant vapors in high concentrations should not be inhaled since they May cause heart irregularites or unconsciousness What diagrams would you use to find the physical location of the low voltage connection terminals in the unit? Pictorial diagram The input side of a step down transformer...

Heat Anticipators Are wired in series Cooling anticipators Are wired parallel Low pressure switches detects a loss of refrigerant Low pressure switches de energizes the compressor Electronic air cleaners do not remove odors Electronic air cleaners normally are 4000 to 8000 dc volts ...

What method of heat transfer does not require fluids or solids ? Radiation - movement of heat through heat waves Capillary tubing should only be cut to length using a : A triangular or knife-edge file Before beginning any electrical checkout procedure, what steps must be taken after the equipm...

<question: The density of air is A: How much air weighs per cubic foot B: How much volume one pound of air occupies C: The ratio of the weight of water to that of the same volume of water D: The ratio of the amount of water vapor contained in a cu. ft. of air to the amount of m...

Class A Ordinary Extinguisher Class B Liquid Extinguisher Class C Electrical Extinguisher Asphyxiation causes what? Nausea, Dizziness, Heart Irregularities, and Unconciousness Ladder must be at what dimensions in relation to a house? 4 ft for every 1 ft, 3 ft above the top of the roof. ...

What electro-mechanical control would you use on a cap tube or automatic expansion valve system to maintain the space temperature? A: A dual pressure control B: A low pressure control C: A thermostatic control D: A high pressure control C: A thermostatic control Open motors are de...

What precautions are required when mounting any gas furnace on a wood platform in an attic? None The gas control valve may be damaged if exposed to an inlet pressure above what? 14 inch W.C. How many elbows and joints should a vent connector have? As few as possible to reduce resistance of flu...

What type of temperature is often used by customers when discussing human comfort Dry buld A particular right triangle has two equal sides. This is a _______ degree triangle 45 T or F? The following is proper for the care of hand tools: clean and wipe them regularly. True What is a method o...

A fuse is used in an electrical circuit to Protect the circuit wires from an overcurrent condition How are fuses rated In amps with a maximum voltage rating What will an ohmmeter measure when testing an open fuse Infinite resistance What type of sensing element is commonly found in fan and ...

In HVACR terms, what is a feature? A special characteristic of a product. In HVACR terms, what is a benefit? The value the customer receives from using the feature What type of temperature is often used by customers when discussing human comfort? Dry bulb What is an honest person? A person ...

What makes a contract legal? Any verbal or written agreement. Why should hacksaws and power saws not be used when cutting tubing or refrigerant lines? The small shavings created by the teeth of the saw can enter the tubing and do damage to the components of the system. Why should tube cutters ...

Low airflow over a residential split system air conditioning evaporator can cause A: Liquid flood-back to the compressor B: A decrease in compression ratio C: An increase in suction line superheat D: Oil logging in the evaporator A: Liquid flood-back to the compressor Which of ...

Ch. 1-1 The ability to utilize all types of communication skills is ________ to the HVACR technician. a) not as important as "hands-on" technical skills b) somewhat important c) unimportant d) very important d) very important Ch. 1-2 It is important to be _______ in filling out service ord...