AIR CONDITIONING

In a typical system, within which component would the evaporation of refrigerant take place?

• Condenser
• Receiver dryer
• Evaporator
• Compressor

What does MAC stand for?

• Mobile Air Conditioning
• Mechanical Air Conditioning
• Mobile Air Compressor
• Mechanical Air Compressor

Where would you expect to find a high pressure liquid within an AC system?

• Between the compressor and the TXV
• Between the TXV and the Evaporator
• Between the compressor and the condenser
• Between the Condenser and the TXV

How would you know the air con gas has been fully recovered from the system? 

• The gauge on the high pressure side reads a positive pressure
• The gauge on the low pressure side reads a negative pressure
• Both gauges read zero pressure at the end of the recovery process
• Both gauges read a positive pressure of 20 Bar at the end of the recovery process

Which of the following would be carried out to confirm a system contained no refrigerant?

• Press the service port valve on the low pressure side and listen for a gas leak
• Connect the gauges to both high and low pressure ports to confirm a vacuum is present
• Connect the Air Conditioning equipment and carry out a full recovery
• Connect the gauges to both high and low pressure ports to confirm no pressure is present

What type of refrigerant is R134a?

• CFC
• HCFC
• HSBC
• HFC

What does COSHH stand for?

• Control of Substances Hazardous to health
• Company omissions of safe Health hazards
• Control of solutions hazardous to health
• Control of Substances which are health hazardous

What does a TXV do?

• Cleans, dries and filters the refrigerant
• It controls the quantity of refrigerant entering the evaporator
• Allows for an increase in pressure and temperature prior to entering the condenser
• It acts as a safety device if the compressor is over pressuring the system

If contamination within an air conditioning system is suspected and a flushing procedure is to be carried out what component should also be changed?

• Compressor
• Receiver Drier
• TXV
• Condenser

What are the impacts on the environment of fluorinated greenhouse gases?

• Contributes to the formulation of acid rain
• Contributes to the global warming
• Mixes with the Nitrogen within the atmosphere to create a toxic substance, Nox
• Has little or no detrimental effect