Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 55, Problem 3ASRQ
Technician A says that the presence of oil around a fitting of an air-conditioning line may indicate an oil leak but not a refrigerant leak. Technician B says that using an electronic leak detector is the best way to find the source of a refrigerant leak. Who is correct?
- Technician A only
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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 a pressure test: Technician A says that a pressure drop of more than 15 psi during a shift indicates a possible leak. Technician B says that any pressure drop between shifts indicates a problem. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forwardTechnician A says that evacuating (pumping down) an air-conditioning system removes air and moisture from the system. Technician B says that evacuating (pumping down) an air-conditioning system removes dirt particles from the system. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forwardWhy should the probe of an electronic leak detector be placed below the area being checked?arrow_forward
- True or False? Oil pressure is determined by whether the pump is a gear type or rotor type and by oil clearances, the pumps pressure regulator valve, and oil viscosity.arrow_forwardTechnician A says that some refrigerant leaks can also be traced to pinholes in the evaporator caused by acid, which forms when water and refrigerant mix. Technician B says that leaks are most often found at the compressor hose connections and at the various fittings and joints in the system. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forwardWhile bleeding air from a cooling system: Technician A loosens a heater hose at its highest point Technician B uses air bleed valves. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forward
- While diagnosing the cause of air bubbles in the coolant recovery tank: Technician A checks for a bad head gasket. Technician B checks the radiator cap. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardTechnician A says that coolant hoses should be squeezed to check for hardening or softening. Technician B says that coolant hoses should be visually inspected for swelling and cracks. Who is correct?arrow_forwardMercury does not wet the wall of the tube of thermometer. Select one: True Falsearrow_forward
- True or false In a hydraulic system, cooler helps to prevent decreasing of viscosity due to high temperaturearrow_forwardWhich is not a pressure or force acting on a TXV diaphragm?A. Head pressureB. Evaporator pressureC. Spring pressureD. Bulb pressurearrow_forwardPressure readings reveal possible problems in which of the following? a. Oil pump b. Governor c. Apply circuits d. All of the abovearrow_forward
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