CHAPTER 4
_____ is the rate at which work is performed.
POWER
What is the formula for POWER?
Power= WORK/TIME
True or False: The subcool temperature is in the evaporator.
FALSE.
What does PSI stand for?
Pounds per Square Inch.
Positive pressure is anything above ____psi?
Zero.
Heat energy can be categorized as latent heat and ____heat.
Sensible
8.25 degrees Celsius.
TXV, Orifice, & EEV
True or False: A solid expands to fill whatever container they are in.
False(gas)
I have ___ pressure and ___temperature on the discharge side of my compressor.
High pressure, high temp.
The ___system is the modern version of the metric system.
SI (systeme international d'unites)
Convert 11 degrees Celsius into Fahrenheit.
51.8 degrees Fahrenheit
From what coil is the suction line coming from?
The Evaporator.
Look at your manifold gauge on the low pressure side if my pressure is 100psi. What is my temperature for R-410A?
30-32 degrees.
According to the combined gas law, if the pressure of a gas is held constant as its temperature is increased, then the volume of the gas _____.
increases.
Object that float on water have a ____
Specific gravity less than 1
What does BTU stand for?
British Thermal Unit
Where is the condenser usually located on a straight AC system?
Outside where it has little or no affect.
True of False: I use my high side on my gauges to get my subcool.
According to the definition and the formula for pressure if, if the area increases_____
pressure decreases.
The purpose of refrigeration system is to transfer____
heat from one location to another.
Heat that brings about a change of state with no change in temperature is called____?
Latent Heat
What is the heart of the system?
Compressor
A _____ is any pressure below atmospheric pressure.
Partial Vacuum
The suction side of the compressor has ____pressure and ____temperature.
Low pressure and low temp.