[D2L] 101E Flashcards
What is a service wrench used for?
1) Open and close compressor valves
2) open and close acetylene cylinders
3) Open and close with protruding stems
4) All of the above
All of the above
What is the purpose of a fin comb?
1) Straighten fins in evaporators
2) Straighten fins in condensers
3) Straighten fins in cooling coils
4) All of the above
All of the above
What is the purpose of a manifold and gauge set?
diagnose and service refrigeration systems
What side of the system does the blue colour coded blue attach to?
1) back pressure side
2) Low side
3) Suction side
4) All of the above
All of the above
What is a compound gauge?
Allows reading of positive pressure and vacuum pressure
In order to read pressures either on the low side or the high side the respected pressure valve needs to be in the open position.
T or F
False
Manifold hoses only come in a 36” hose.
T or F
False
manifold hoses in different sizes such as 24 inches, 36 inches, 60 inches, and even longer depending on the specific application and manufacturer.
Which way should a hacksaw blade be mounted?
Always mount the blade so that cutting is on the push stroke
What is the correct hacksaw blade to cut copper pipe?
24 teeth per inch
What is the main purpose of pliers?
To hold or turn odd shaped materials
Mercury-filled thermometers have a range of -38.9 C to 356.7 C
T or F
True
What does a sling psychrometer actually measure?
1) Relative humidity
2) Dry bulb temperature
3) Web bulb temperature
4) Both b and c
Both B & C
What precaution must be followed in order for an infrared temperature sensor to read accurately?
Use dull tape on any shiny surface being measured.
What do refrigeration gauges use to measure pressure?
a bourdon tube
It is important for proper refrigeration system evacuation that vacuum levels drop below 500 microns.
T or F
True
