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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