NATE Core Exam Questions (A+ GUARANTEED)

Class A correct answers Ordinary Extinguisher Class B correct answers Liquid Extinguisher Class C correct answers Electrical Extinguisher Asphyxiation causes what? correct answers Nausea, Dizziness, Heart Irregularities, and Unconciousness Ladder must be at what dimensions in relation to...

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 correct answers A: Liquid flood-back to the compres...

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 correct answers d) very important Ch. 1-2 It is important to be _______ in filling...

Which of the following factors affects a customer's level of comfort? a. Air movement b. Humidity c. Temperature d. All of the above correct answers d (All of the above: air movement, humidity, temperature) A cooling load calculation estimates the sensible heat gain of a structure. The max...

An air conditioning technician is working in the basement of a large B37public building. The technician notices several unsafe and dangerous conditions. Of the following conditions that are noticed, which is the most dangerous and should be reported immediately? A: Gas leaking from a cracked pi...

what type of meter is most ap propriate when a tech must determine voltage? correct answers voltmeter temp at which moisture begins to condense on objects? correct answers dew point btu's equivalent to 1 watt hour A. 3.418 B. 3.413 C. 3.213 D. 4.314 correct answers 3.413 btu electrica...

A judgment correct answers An opinion is Easy to use correct answers Which of the following is a future of a product or service A truth correct answers A fact is Saves time correct answers Which of the following is a benefit of a product or service DOT correct answers Which of the follow...

A condensing unit should be mounted on a slab that is level to: A: Allow any accumulated water to evenly run out of the cabinet B: Increase airflow through the fin area C: Prevent the unit from tipping over D: Make certain any top discharge air blows straight up correct answers A A si...

On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? correct answers 6-7PSI or 6F What is the primary purpose of using flux when soldering copper or brass parts? correct answers Prevent Oxidation The water that results from ...

Charging a heat pump with refrigerant is best accomplished in the _______ mode. A: Heating mode B: Cooling mode C: Defrost mode D: Emergency heating mode correct answers B: Cooling mode Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is t...

Since 1992, the United States Department of Energy has required that all furnaces sold and installed from that date on must have an AFUE of no less than: A: 70% B: 75% C: 78% D: 80% correct answers C: 78% Many pre-1992 furnaces have efficiencies around _______. A: 10% B: 4...

a (Centrifugal) correct answers Which of the following compressors are considered a dynamic compressor? a. Centrifugal b. Reciprocating d. Rotary c. Scroll b (Superheated vapor / sub cooled liquid) correct answers What is the condition of the refrigerant as it enters and leaves the condensi...

A system is supplied from the factory with charge of 5 pounds 10 ounces for a 15 foot line set. The line set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be added for each added foot of refrigerant line set length. What is the total refrigerant char...

What are the five basic components to any schematic? correct answers 1. A power supply 2. A path for the power 3. A load or component that operates from the power. 4. A switch or component that interrupts the power to the load. 5. A legend or key that explains what the various symbols and abbrev...