1. NATE Industry Competency Exam Core Questions with Certified Answers Graded A+

A particular cleaning solution is made by mixing a liquid cleaning concentrate with water. The instructions specify mixing 1 quart of concentrate with 14 quarts of water. A technician wishes to prepare 60 quarts of mixed cleaning solution. How many quarts of cleaning concentrate will be needed? a. 3 b. 3 ¾ c. 4 d. 4 ¾ - Answer: C A technician is using a flexible rule that uses inches that are divided into 32 divisions. The technician is marking a length of tubing that is 11 1/8 inches in length. How many divisions will be used to mark off the 1/8th of an inch? a. Four b. Eight c. Sixteen d. Thirty-two - Answer: A What tool is typically used immediately after copper tubing is cut? a. Swage b. Torch c. Reamer d. Flaring - Answer: C The federal regulatory agency with jurisdiction over the shipping and labeling of refrigerants is: a. Occupational Safety and Health Administration (OSHA). b. Environmental Protection Agency (EPA). c. Department of Transportation (DOT). - Answer: C According to health and safety regulations, when climbing up or down a ladder the worker must: a. Always face the ladder. b. Always face away from the ladder. c. Always use two hands to grasp the ladder. d. Always climb up or down as fast as possible. - Answer: A Ceiling joints typically rest directly on: a. Wall top plates. b. Vertical studs. c. Rafters. d. A ridge. - Answer: A Which one of the following terms refers to the temperature at which moisture in the air begins to condense on objects? a. Dry bulb temperature b. Dew point c. Humidity ratio d. Wet bulb temperature - Answer: B Moisture (or water vapor) in the air is: a. Specific heat. b. Sensible heat. c. Superheat. d. Latent heat. - Answer: D In order to determine relative humidity, the technician should use a(n): a. Inclined manometer. b. Sling psychrometer. c. Anemometer. d. Pyrometer. - Answer: B In regard to the installation of a room thermostat, which one of the following statements is correct? a. The wall opening behind the thermostat must be sealed. b. The thermostats should be 7 feet above the floor, anywhere in the room. c. The thermostat must be installed in a hallway near a door or window. d. The thermostat should be located - Answer: A As pressure on a liquid increases, the boiling point of the liquid: a. Increases. b. Decreases. c. Increases or decrease, depending on the ambient air temperature. d. Increases or decreases, depending on the elevation. - Answer: A A 5-kW electric heater rated at 240 volts equals how many watts?