In 1902, Michael Faraday invented and patented the first electric air-conditioner.

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Automotive air-conditioning is federally regulated by ________.

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_______ made it possible for air-conditioning systems to be used by consumers with no apparent harm, unlike the ammonia systems.

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Which of these heating/cooling systems was the first to be free of apparent harm to passengers?

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Automotive air-conditioning service and repair technicians need to have a special license called the ________.

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Technician A says that one advantage of an air conditioner is that the system removes water from the air. Technician B says that air conditioners are needed to remove moisture from the inside of the windshield to meet the mandated defrost time. Who is correct?

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The Clean Air Act (CAA) ________.

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The first use of air heated from ______ to warm the passenger compartment dates from the late 1920's.

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Tech A says that the EPA regulates automotive air-conditioning systems. Tech B says that EPA tests air-conditioning systems every 5 years. Who is correct?

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For obtaining an A/C service license, which of these is a self-study course offered by Automotive Service Excellence (ASE), the Mobile Air Conditioning Society (MACS), and Mainstream Engineering?

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In 1939, Packard introduced the first automotive air-conditioning system as an add-on luxury unit.

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Technician A says that the technician is responsible for using properly certified equipment when servicing mobile vehicle A/C systems. Technician B says that the current fine for not complying with the EPA 609 is $37,500 per day per incident. Who is correct?

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The heat required to change the water at its maximum temperature from a liquid to a gas is called:

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The amount of heat required to raise the temperature of 1 pound of water at 32°F (0°C) and at atmospheric pressure by 1°F would be:

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By adding a small amount of pressure to automotive refrigerant, the boiling point of the refrigerant will rise.

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_______ currents from the heated air in the passenger compartment flow over an evaporator core of refrigerant, causing a conduction of heat through the metal coils of the evaporator.

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The refrigerant in the A/C system must have a boiling point ______ freezing to manipulate its boiling and condensing points by changing pressure.

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The changing of state in liquids and gases, referred to as ________, is the basis of air-conditioning.

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Starting at the compressor, a low-pressure gas is compressed into a high-pressure gas and is pumped into the _______ located in the front of the vehicle radiator.

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________ is the process of transferring heat through matter by the movement of heat energy through solids from one particle to another.

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The circulatory movement that occurs in a gas or fluid with areas of differing temperatures due to the variation of the density and the action of gravity is called:

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What is the temperature at which water boils?

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Heat always transfers from hot objects to cold objects.

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In the automotive refrigerant system, low-pressure liquid leaves the metering device and travels into the ______ in the passenger compartment.

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Heat transfer can take place by _______.

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The air must keep flowing over the evaporator, renewing the heat source to keep the refrigerant evaporating ( ______ ) efficiently without freezing.

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With the use of ________, maintaining vaporization and condensing points at normal ambient temperatures is simply done by raising or reducing the pressure of the refrigerant.

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What is the typical low side pressure of a vehicle's A/C system?

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One pound of water at _______ and at a temperature of 32°F (0°C) would require 1 Btu of energy added to increase the temperature 1°F.

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Tech A says that R-134a replaced R-12 as an approved refrigerant. Tech B says that HFO-1234yf refrigerant is flammable. Who is correct?

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When the air-conditioning pressure gauge fittings are inserted into the Schrader valves, they push down the valve to allow ________ to be released into the gauge hoses.

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The boiling point of the air-conditioning refrigerant has to be ________ for the heat to be absorbed by the boiling refrigerant in the evaporator.

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The air-conditioner is an open loop system.

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On many early air-conditioning systems, the low-pressure switch would open and close often, causing the clutch to cycle on and off.

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In the automotive air-conditioning system, the transformation from liquid to gas begins when the air from the passenger compartment passes over the ______ coils and fins.

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Choose the correct statement with respect to driers:

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Barrier-type air-conditioning hose is constructed with a nylon inner core to prevent moisture _______ (movement into the system) and permeation of refrigerant from the air-conditioning system.

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The site glass is still used on some automotive air-conditioning systems but should not be used with ________.

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High pressures can occur in air-conditioning systems when the refrigerant has escaped.

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