Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Textbook Question
Chapter 55, Problem 3MC
To charge an air-conditioning system while it is run ning, the refrigerant should be added to.
- the high side
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Chapter 55 Solutions
Automotive Technology
Ch. 55 - What should you do if you suspect that an...Ch. 55 - Explain how dye can be used to find leaks in the...Ch. 55 - What is the purpose of the thermostatic switch in...Ch. 55 - Why should the probe of an electronic leak...Ch. 55 - How will air trapped in the A7C system affect...Ch. 55 - Which of the following statements best defines the...Ch. 55 - Which of the following statements is not true...Ch. 55 - To charge an air-conditioning system while it is...Ch. 55 - All of the following are true statements about...Ch. 55 - A very important part of a performance test on an...
Ch. 55 - While conducting a pressure test on an A/C system,...Ch. 55 - The high-side pressure on a system with a cycling...Ch. 55 - When checking an A/C system, the evaporators inlet...Ch. 55 - All of these are good reasons for replacing an...Ch. 55 - In an AZC system, if the low-side pressure is...Ch. 55 - Technician A says that evacuating (pumping down)...Ch. 55 - Technician A says that some refrigerant leaks can...Ch. 55 - Technician A says that the presence of oil around...Ch. 55 - Technician A says that a faulty accumulator will...Ch. 55 - Technician A says that air in the system can cause...Ch. 55 - Technician A feels up and down the face or along...Ch. 55 - Technician A says that a manifold gauge set can be...Ch. 55 - While discussing an inoperative blend air door:...Ch. 55 - Two technicians were discussing how comparing the...Ch. 55 - While conducting an A/C system performance test:...
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- While discussing the operation of air-conditioning systems: Technician A says that in order for the refrigerant to release heat, it must be at a low temperature and pressure. Technician B says that in order for the refrigerant to absorb heat, it must be at a high temperature and pressure. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardTrue or False: The indoor fan must always run during the cooling cycle.arrow_forwardWhich of the following statements best defines the term evacuation? A process in which the refrigerant in a system is released. A condition that exists when a compressor runs until there is no refrigerant left in the system. The process that pulls all traces of air and moisture from the system. A process that uses air to force moisture and dirt out of the system.arrow_forward
- What lubricates the refrigeration compressor? A. Refrigerant B. Moisture C. Desiccants D. Oilarrow_forwardWhen condenser tubes become fouled, they may be cleaned by A. using a steel brush. B. using a brass brush. C. using a chisel and hammer. D. running a mixture of sand and water through them.arrow_forwardTrue or False: A vacuum pump can remove any type of foreign matter that enters a refrigeration system.arrow_forward
- A hydronic heating system uses ______to move heat around in the system.arrow_forwardWhich of the following should be turned off while working on the compressor circuit? A. The indoor unit fan B. The unit disconnect C. The thermostat D. The main power supply to the buildingarrow_forwardTwo or more refrigerants combined together to createanother refrigerant is referred to as a(n) ________.arrow_forward
- Technician A says that when the refrigerant is pumped out of the compressor and sent to the condenser, heat in the refrigerant is moved to the outside air by conduction and convection. Technician B says that the refrigerant leaves the bottom of the condenser as a high-pressure, high-temperature liquid. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forwardWhat special precautions should be taken with drainlines in walk-in coolers? A. Freeze protection B. Trapping to prevent air from being pulled in C. Downward sloping D. All of the abovearrow_forwardIf a condenser circuit breaker is tripped, you should A. reset it. B. check the suction pressure. C. check the high-side pressure. D. perform a resistance check of the compressor section.arrow_forward
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