Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
36 Cards in this Set
- Front
- Back
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 |