Nate Core Exam Questions and Correct Rationales Graded A+

relative humidity - Answer: A sling psychrometer can measure wet bulb and dry bulb temperature. These measurements are then used to compute? a. Comfort index. b. System temperature differential. c. Relative humidity. d. Sub cooling Sling psychrometers. - Answer: Because they are very accurate, liquid filled thermometers are often used in? a. Electronic wall thermostats. b. Infrared thermometers. c. Superheat and sub cooling measuring d. Sling psychrometers. A conventional thermometer with a moistened cloth wick covering its sensor - Answer: Which of the following is an example of a wet bulb thermometer? a. A glass thermometer with a plastic cover over the sensor. b. A glass thermometer with a bulb that has been dipped in water. c. A conventional thermometer with a moistened cloth wick covering its sensor d. A conventional thermometer with a built in converter to wet bulb readings. Always the same. - Answer: The overload protections of the "1 OA" and "mA" inputs of a digital multimeter typically used in HVAC works are? a. Sometimes the same. b. Always the same. c. Never the same. d. Rarely the same. At zero or a specific resistance. - Answer: As a general rule, a continuity check using an ohmmeter shows continuity by reading? A. At zero or a specific resistance. b. Greater than 1 M ohm c. At or very near an infinite number of ohms. d. Of Ovolts. By connecting the voltmeter in parallel with the voltage to be measured. - Answer: How is a voltmeter connected for taking voltage readings? a. By connecting the voltmeter in parallel with the voltage to be measured. b. By connecting the voltmeter in series with the voltage to be measured. c. By always connecting the voltmeter with one lead at one side of the voltage and the other lead at ground. d. By always connecting the voltmeter with an external shunt across the voltage to be read. Reading type and range of values for all volts, amps and ohms. - Answer: A digital electric multimeter marked for "auto ranging" will automatically set itself for? a. Reading ohms and range when connected to a resistive load. b. Reading voltage and range when connected to a voltage source. c. Range of approximate value when set for either volts, amps or ohms. d. Reading type and range of values for all volts, amps and ohms. Chemical - Answer: Combustion is what type of process? a. Mechanical b. Chemical c. Electrical. d. Pneumatic Dry bulb reading. - Answer: The temperature most often used by customers when discussing human comfort is? a. Comfort index. b. Dry bulb reading. c. Wet bulb reading. d. Humidity ratio. Vaulted - Answer: A ceiling which slopes upward from the walls to the center of the room is referred to as: a. Vaulted b. Suspended. c. Dropped. d. Furred down. Pier and beam. - Answer: What type of residential construction uses flooring over a crawlspace? a. Pier and beam. b. Slab. c. Board and batten. d. Open beam As a reading relative to atmospheric pressure - Answer: Any pressure exerted by a liquid or gas on a surface is typically measured? b. 3.41 Btu - Answer: How much heat is created by one watt? a. 1.24 Btu b. 3.41 Btu c. 34.5 Btu d. 45.9 Btu C. 33.33% - Answer: 1O is what percentage of 30?