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HVAC-101 Intro To HVAC Exam Guide 2024. All NATE specialties are offered at two levels. They are: Apprentice and journeyman. Installation and service. Heating and air conditioning. Journeyman and master. - CORRECT ANSWER Installation and service HVAC Excellence: A)Oversees national curriculum standards for all trade and technical education organizations. B) Regulates all HVACR manufacturing facilities in the United States. C)Established an organization to provide programmatic ...

HVAC Controls Unit 14 Final Exam 2024. If a mercury bulb thermostat is not mounted perfectly level, there will be a large difference between the actual room temperature and the thermostat's set point. - CORRECT ANSWER The correct answer is 'True'. Line voltage thermostats have heavier contacts and use which type of sensing element? - CORRECT ANSWER The correct answer is: all of the above a. bimetal b. bellows c. remote bulb The best type of switch to detect air movement is...

HVAC Chapter 5 Review Study Exam 2024. The ____________________, used to help the installation electrician to wire the unit properly, gives specific information about terminals, wire sizes, color coding, and breaker or fuse sizes. - CORRECT ANSWER installation diagram The schematic diagram is the most useful and easiest to follow of any electric diagram. - CORRECT ANSWER True The function of the pressure switch determines whether it ________ on a rise or fall in pressure. - CORRECT AN...

Hvac Unit 38 Study Guide 2024. One drawback of using custom made, pre-measured duct sections is that ____. - CORRECT ANSWER all of the above The reason many installations utilize a straight main trunk line with flexible duct runs to the individual register boots is to ____. - CORRECT ANSWER all of the above What two fasteners are used with sheet metal square and rectangular duct? - CORRECT ANSWER S fasteners and drive cleats What fastener is commonly used with round flexible duct?...

HVAC Controls Final Exam Questions 2024. The thermostat terminal that connects to the reversing valve control in a heat pump is - CORRECT ANSWER O (orange), heat pump (red) power (Green) Fan Control (yellow) Cooling contorl y1-y2 stage (white) heating contorl Increase Furnace effectively, the start of the furance blower is delayed using - CORRECT ANSWER Time delay relay A conventional thermostat should not be thrown into the regular trash because it - CORRECT ANSWER may contain mercur...

Hvac Unit 41 Review Practice Questions 2024. Before installing a gauge on the high-pressure side of a system, you should do which of the following? - CORRECT ANSWER A. Turn on the system. B. Turn off the system. C. Adjust the system to a neutral position. D. Have a cylinder approved by the DOT nearby. ANS: B. Capacitors should be shorted with a _____ before checking with an ohmmeter. - CORRECT ANSWER 20,000 ohm Resistor The high- and low-side pressures on an operating air-conditio...

HVAC EXCELLENCE STUDY GUIDE TEST 2024. Heat which causes a change in temperature of a substance is called - CORRECT ANSWER sensible heat, Heat added to a substance without a rise in temperature; (example: liquid refrigerant to gas) this process la called? - CORRECT ANSWER latent heat Heat added to the refrigerant in vapor state after the evaporation process is called, - CORRECT ANSWER superheat A scroll compressor moves refrigerant by means of; - CORRECT ANSWER involute spirals ...

HVAC Units 2 & 3 Exam Questions & Answers 2024. A liquid material exerts a pressure or Force. - CORRECT ANSWER Outward and downward If the temperature remains constant and the volume that a gas occupies increases the pressure will. - CORRECT ANSWER Decrease The volume of gas varies inversely with the absolute pressure, provided the temperature remains constant. This is called. - CORRECT ANSWER Boyle's law At a constant pressure the volume of a gas varies as to the absolute tempera...

HVAC Final Exam, Unit 10 Correctly Answered 2024. If 30 oz. of refrigerant are to be added to a refrigeration system and the supply cylinder weighs 26 lb. 4 oz. before any is added, what will the supply cylinder weigh after the system has been charged? - CORRECT ANSWER 24 lb. 6 oz. Fractionation occurs when? - CORRECT ANSWER Some of a blended refrigerant evaporates and condenses before the rest of the blend A graduated cylinder charging device is a device that? - CORRECT ANSWER All of...

HVAC EPA Type I Written Exam 2024. If after installing a fitting for the purpose of recovering the appliances refrigerant, you find that the system pressure is 0 psig; - CORRECT ANSWER Refrigerant recovery is not required. System-dependent recovery methods may only be used on appliances containing; - CORRECT ANSWER 15 pounds of refrigerant or less. When filling a charging cylinder with a regulated refrigerant; - CORRECT ANSWER The refrigerant vapor that is vented off the top of the cy...

HVAC Chapter 7 Review Study Guide Questions 2024. is a hollow pipe or conduit that conveys and transfers air in a heating, ventilating, and cooling system. - CORRECT ANSWER Duct A duct system, frequently called ______________, is a network of ducts that confines and channels air and serves as the distribution system in a heating, ventilating, and cooling air system. - CORRECT ANSWER Ductwork type ductwork is typically used to connect diffusers, mixing boxes and other terminals. - CORR...

HVAC Midterm 1 Exam Questions & Answers 2024. The conditions that are normally maintained in an indoor space are referred to as its __________ - CORRECT ANSWER climate According to ASHRAE, the process to treating air so as to control simultaneously temperature, humidity, cleanliness, and distribution is called _______ - CORRECT ANSWER air conditioning Earth's atmosphere contains about 23% _________ - CORRECT ANSWER oxygen When air temp reaches 100% relative humidity, it is at its ...

HVAC Final Exam, Unit 10 Practice Questions 2024. If 30 oz. of refrigerant are to be added to a refrigeration system and the supply cylinder weighs 26 lb. 4 oz. before any is added, what will the supply cylinder weigh after the system has been charged? - CORRECT ANSWER 24 lb. 6 oz. Fractionation occurs when? - CORRECT ANSWER Some of a blended refrigerant evaporates and condenses before the rest of the blend A graduated cylinder charging device is a device that? - CORRECT ANSWER All of...

HVAC Unit 31 Gas Heat Exam Questions Correctly Answered 2024. Name the four main components of a gas fired heating system. - CORRECT ANSWER Manifold and controls Burners Heat exchanger Venting system Name the four types of furnace flow patterns. - CORRECT ANSWER Upflow Low-boy Downflow Horizontal Which type of furnace is usually found in basements that have low headroom? - CORRECT ANSWER Low-boy What is another name for a downflow furnace? - CORRECT ANSWER Counterflow Wher...

HVAC Copper And Piping Study Guide Questions 2024. Of the following copper tubing types, the one with the thinnest wall is? - CORRECT ANSWER Type M. Which of the following gases may be safely used to pressure test a refrigeration system? - CORRECT ANSWER Nitrogen. The type of plastic pipe that is primary connected with clamps is? - CORRECT ANSWER PCV. Refrigeration tubing size are expressed in terms of? - CORRECT ANSWER Outside diameter of the tube. Saw blade that is too coarse ...

HVAC Code Final Exam 2024. The building Official may issue a ____ to the Owner's Agent or person doing the work if the work being performed in a dangerous or unsafe manner. citation correction notice stop work order red tag - CORRECT ANSWER stop work order A venting system that removes vent gases under non-positive static pressure is also known as a _____. conventional vent system direct vent system natural draft system power vent system - CORRECT ANSWER natural draft system...

HVAC Air Distribution System Questions & Answers 2024. The lowest pressure level withing an air distribution system is found at the? - CORRECT ANSWER Input to the blower. The velocity pressure in a air duct equals the? - CORRECT ANSWER The total pressure minus the static pressure. At sea level, every inch of Earth as an absolute pressure of? - CORRECT ANSWER 14.7psi. Air systems used only for heating usually require_______ systems used for both heating and cooling. - CORRECT ANSWER...

HVAC Unit 12 Review Practice Questions 2024. The _______ is that part of an atom that moves from one atom to another. A.Electron B. Proton C.Positron D.Neutron - CORRECT ANSWER A.Electron The nucleus of an atom contains which particles? A.Electrons and neutrons B.Positrons and protons C.Electrons and positrons D.Neutrons and protons - CORRECT ANSWER D. Neutrons and Protons If an atom has a net positive charge, which of the following is correct? A.The atom has lost p...

HVAC Unit 20 FINAL Exam Study Guide 2024. What is the best method to repair a fractional horsepower motor that has a bad bearing? - CORRECT ANSWER Replace the entire motor. A technician needs to check a single-phase compressor. He labels the three terminals "A," "B," and "C" and takes resistance readings of the windings. He reads 10 ohms from "A" to "B," infinity from "B" to "C," and infinity from "C" to "A." Identify the terminals. - CORRECT ANSWER Can not identify ter...

HVAC MODULE 5 METERING DEVICES COMPLETE EXAM 2024.HVAC MODULE 5 METERING DEVICES COMPLETE EXAM 2024. A metering Device is refrigeration circuit device that... - CORRECT ANSWER Converts high-pressure, high temperature liquid refrigerant to a low-temperature, low pressure mix liquid and vapor refrigerant. One distinguishing feature of the TXV is that it - CORRECT ANSWER Uses a Thermistor as a sensing device In a dx system operating normally the refrigerant leaving the evaporator should ...