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