A/C testing and service - part A 403cA Flashcards
When you are using any refrigerant or working on an air conditioning system, you must always wear at least one of these:
(3)
- safety goggles.
- safety glasses with side shields.
- a face shield.
When exposed to an open flame, refrigerants that contain fluorocarbons break down and produce:
dangerous poisonous vapours.
The maximum allowable filling limit for any refrigerant container is:
80% of its internal volume.
It is acceptable to recover different types of refrigerants into the same container, producing a refrigerant cocktail, as long as you reuse it afterwards.
T/F
false
The manifold gauge set’s ________________________________ registers the
pressure, in the range of 0 to 500 psi, which is present in the right hand (red) hose.
high-pressure (red) gauge
The manifold gauge set’s _________________________________ registers the
pressure in the range of 0 to 150 psi, which is present in the left hand (blue) hose.
low-pressure compound (blue) gauge
The manifold gauge set’s centre mounted utility (yellow) hose can be used to:
(5)
- recover refrigerant from the air conditioning system
- pressure test (leak check) the air conditioning system with nitrogen
- evacuate air and moisture from the air conditioning system
- add oil to the air conditioning compressor with the use of an oil injector
- recharge the air conditioning system with refrigerant
The purpose of using a high capacity vacuum pump when servicing an air conditioning system is to remove the moisture and air that is hidden in the hoses and components of a closed air conditioning system.
T/F
true
A micron gauge can be used to accurately measure _______________
that has been reached in the air conditioning system as it is being evacuated.
the level of vacuum
If the bubble crimp produced on a bead lock fitting is properly centred and looks
regular, you can check its accuracy with the use of a _______________.
micrometer.
The bent fins of the air conditioning condenser and evaporator can be straightened
by the use of a ______________.
fin comb.
A damaged or loose ________________________ can cause a
refrigerant leak large enough to render an air conditioning system useless in a matter of hours.
Schrader valve core
Quality troubleshooting and service procedures always start with a ______________
____________________ of the HVAC system.
visual inspection
The first step in diagnosing the source of an HVAC system cooling problem is to
________________________________.
gather information.
If the HVAC visual inspection has eliminated the cab heating system from being the cause of the cooling malfunction, but has not helped to isolate the air conditioning
problem, you should conduct an air conditioning system ____________________
______________________.
performance test.
