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36 Cards in this Set

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HOW DO YOU CALCULATE THE AREA OR A CIRCLE ?
3.14 X R X R = AREA
DIAMETER OF A CIRCLE
INSIDE MEASUREMENT OF A CIRCLE
RADIUS OF A CIRCLE
1/2 THE DIAMETER
1 SQUARE FOOT = HOW MANY CUBIC INCHES ?
144
ONE CUBIC FOOT =
HOW MANY CUBIC INCHES
1728
VOLUME OF A RECTANGLE
HEIGTH X WIDTH X LENGTH = VOLUME
CHANGE INCHES TO FEET
DIVIDE BY 12
CHANGE FEET TO INCHES
MULTYPLY BY 12
1 TON OF REFRIGERATION
PER MINUTE ?
200 BTU PER MINUTE
1 TON OF REFRIGERATION
PER HOUR ?
1200 BTU PER HOUR
1 TON OF REFRIGERATION
PER DAY ?
288.000 BTU PER DAY
CHANGE CENTIGRATE TO FARENHEIT
CENTI X 1.8 + 32 = FARENHEIT
HOW MUCH DOES A GALON OF WATER WEIGH
8.33 LBS
HOW MAMY CUBIC INCHES = 0NE GALLON
231 CUBIC INCHES
ONE CUBIC INCH OF WATER =
POUNDS
.0361 LBS
ONE CUBIC FOOT OF WATER =
GALONS
7.48 GALONS
LATENT HEAT OF WATER IS
970 BTU
LATENT HEAT OF ICE IS
144 BTU
SPECIFIC HEAT OF WATER
1
VOLUME OF A CYLYNDER
RADIUS X RADIUS X 3.14 X LENTH
ONE KILOWATT =__________WATTS
1,000 WATTS
EACH HOURSEPOWER REQUIRES
_______WATS OF ELECTRICITY
746
COVERT HP TO WATTS
HP X 746 = WATTS
CONVERS KILLOWATS TO $
7.46 X $ =
WHAT IS LATENT HEAT ?
WHEN THE TEMPERATUE IS REACHED AT WICH HEAT ADDED OR SUBTRACTED DOES NOT CAUSE FURTHER CHANGE IN TEMPERATURE(AS AT FREEZING OR BOILING POINT)
GROUP 1 REFRIGERANTS
NON TOXIC
GROUP 2 REFRIGERANTS
IRRITANTS
GROP 3 REFRIGERANTS
FLAMABLE
PURPOSE OF THE COMPRESSOR
IT TO INCREASE THE PREASURE
OF A GIVEN VOLUME AND WEIGHT
OF GAS(IN THIS CASE REFRIGERANT)
WHAT ARE THE TWO CLASIFICATIONS (KINDS)OF COMPRESSORS ?
POSSITIVE DISPLACEMENT &
NON-POSITIVE DISPLACEMENT
HOW DO POSITIVE DISPLACEMENT COMPRESORS WORK ?
THEY INCREASE THE PREASURE OF THE REFROGERANT BY PHYSICLLY REDUCING ITS VOLUME
HOW DO NON-POSITIVE DISPLACEMENT COMPRESORS WORK ?
THEY RELY ON THE VELOCITY PREASURE PRODUCED BY ACCELERATION THEN DECELERATION OF VAPOR AS IT FLOWS THROUGH THE COMPRESOR
WHAT IS AN EXAMPLE OF A POSITIVE DISPLACEMENT COMPRESSOR ?
A-RECEPROCATING
B-SCREW
C-SCROLL
D-ROTARY
WHAT IS A EXAMPLE OF A
NON-POSITIVE DISPLACEMENT COMPRESSOR ?
A-CENTRIFUGAL
WHAT IS THE FUNCTION OF THE EVAPORATOR ?
IT IS A HEAT EXCHANGER
HEAT FROM AN OBJECT OR A MASS IS ABSORBED INTO THE REFRIGERANT
WHAT IS THE POUPOSE OF THE CONDENSER ?
1-LIQUEFY THE REFRIGERANT
2-REJECT HEAT FROM REFRIGERATION CYCLE