[ILM] 101E Tools & Instruments Flashcards
service wrench is
valve wrench
fin combs are used
to straighten fins in evaporators, condensers and cooling coils
always wear gloves while using a fin comb to prevent cuts
gauge set
accurately diagnose service refrigeration and air conditioning systems
see p5 for visual
low side gauge & service hose are colour coded
blue
high side gauge & service hose are colour coded
red
centre hose is colour coded
yellow
Phillips screwdriver
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#0 - 0 to 1
#1 - 2 to 4
#2 - 5 to 9
#3 - 10 to 16
#4 - 18 to 24
Robertson screwdriver
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#0 - 3 and 4 (yellow)
#1 - 5 to 7 (green)
#2 - 8 to 10 (red)
#3 - 12 and larger (black)
hex wrenches are
Allen keys
always mount the blade so that cutting is on the push stroke
T or F
True
less teeth
more teeth
wood
metal, copper
24 teeth per inch
32 teeth per inch
thicker sheet metal
thinner sheet metal
store hacksaws with the blade tension loosened
T or F
True
metal snips (tin snips)
left direction
right direction
hammer peen
망치 둥그런 부분
micrometer
anvil
thimble
ratchet
alcohol is much safer than mercury
T or F
True (-40C ~ 78C)
mercury-filled thermometers
-38.9C ~ 356.7C
the bimetallic thermometer has 2 dissimilar metals bonded together
T or F
True
the difference between the dry and wet bulb temperature is called
web bulb declination
sling psychrometers come with a chart that uses wet bulb declination to determine relative humidity
T or F
True
1 psi ==
25,400 microns
vacuum gauges are often called
micron gauges
hygrometer == sling psychrometer determines
relative humidity of both room and outside air
