Theory Flashcards
1
Q
How many grains in a lbs?
A
7000
2
Q
How is the evaporation rate of a liquid refrigerant controlled?
A
By increasing it decreasing vapor pressure
By increasing or decreasing the supply of heat energy
3
Q
What is the btu rating of water per lbs
A
970
4
Q
What is absorption?
A
One liquid absorbing the vapour from another liquid
5
Q
Ok a A19 temp controller what is the position of W
A
Closes on a fall in temp cooling
6
Q
Actual volume flow rate=
A
MFR x SV ex. 2.5
7
Q
Theoretical volume flow rate=
A
Actual volume over efficiency
8
Q
Hot gas defrost goes To where first
A
Evaporator pan
9
Q
Suction line solenoid is for…
A
Compressor liquid protection
