NATE Final Exam 1 Questions and Answers Latest Updated 2024/2025 (GRADED A+)

NATE Final Exam 1 Questions and Answers Latest Updated 2024/2025 (GRADED A+) Generally, vibration eliminators in piping should be installed: A: At a 45 degree angle B: At a 90 degree angle C: Perpendicular to the compressor crankshaft D: Parallel to the compressor crankshaft: D: Parallel to the compressor crankshaft 2. If you purchased ten filter-driers for $100.00, what was the price of each filter-drier? A: $100.00 B: $10.00 C: $1.00 D: $1.10: B: $10.00 NATE Final Exam 1 Questions and Answers Latest Updated 2024/2025 (GRADED A+) 2 / 13 3. Which of the following jobs requires safety glasses? A: Driving a vehicle B: Extending a ladder C: Brazing D: Pulling thermostat wire: C: Brazing 4. Which of the following instruments would typically be used to measure a vacuum? A: Micron gauge B: Thermostat C: Anemometer 3 / 13 D: Differential pressure gauge: A: Micron gauge 5. ASHRAE Standard 34 deals with: A: Carbon monoxide safety levels B: Refrigerant quality C: Equipment room ventilation and alarms D: Refrigerant toxicity and flammability: D: Refrigerant toxicity and flammability ANSI/ASHRAE 34 published in 2001 and entitled "Designation and Safety Classification of Refrigerants". • Class A signifies refrigerants for which toxicity has not been identified at concentrations less than or equal to 400 ppm; • Class B signifies refrigerants for which there is evidence of toxicity at concentrations below 400 ppm. • Class 1 indicates refrigerants that do not show flame propagation when tested in air at 21°C and 101 kPa; 4 / 13 • Class 2 indicates refrigerants having a lower flammability limit of more than 0.10 kg/m3 at 21°C and 101 kPa and a heat of combustion of less than 19 kJ/kg; • Class 3 indicates refrigerants that are highly flammable as defined by a lower flammability limit of less than or equal to 0.10 kg/m3 at 21°C and 101 kPa or a heat of combustion greater than or equal to 19 kJ/kg. 6. What control would you use on a capillary tube or automatic expansion valve system to maintain the desired temperature? A: Dual pressure control B: High pressure control C: Thermostatic temperature control D: Low pressure control: C: Thermostatic temperature control 7. The total heat contained in any substance is obtained by adding together its: 5 / 13 A: Radiant and specific heat B: Latent and sensible heat C: Radiant and sensible heat D: Specific and latent heat: B: Latent and sensible heat 8. An outdoor air conditioning condensing unit should not be located: A: In the sun B: On the side of the house C: Within 5 feet of a hose bib connection D: Where any objects or obstructions are within 5 feet of the condenser fan: D: Where any objects or obstructions are within 5 feet of the condenser fan 9. An outdoor air conditioning condensing unit should not be located: A: Under an overhang where water may drain onto it B: Within 4 feet of a hose bib connection C: Within 3 feet of an electrical disconnect D: All of the above: A: Under an overhang where water may drain onto it 10. A thermostat should be mounted: EMAIL ME: EMAIL ME: 6 / 13 A: Approximately 5 feet above the floor B: Level C: On an inside wall D: All of the above: D: All of the above 11. As the pressure on a liquid rises, the temperature at which the liquid will boil: A: Varies