UNIT 2 Flashcards
Volume that each pound of gas occupies. Unit of measure is.ft3/lb.
Specific volume
Matter that exerts all of its force downward
Solid
Energy can be neither created nor destroyed, but can be converted from one form to another
The Law of conversion of energy
Force that matter applies to a supporting surface when it is at rest
Weight
Total pressure of a confined mixture of non-reacting (inert) Gases is the sum of the pressures of each of the gases in the mixture
Dalton’s law
Converting electron flow to usable energy
Magnetism
Rate of doing work expressed as ft-lb/min
Horsepower
Natural gas oil and coal are examples of this
Fossil fuel
The capacity for doing work
Energy
A force moving an object expressed as:
Lbs x ft= ft-lb
Work
True or false
A substance that has a specific gravity greater than the specific gravity of water (1) will sink in water
True
True or false
The correct unit of measurement for specific volume is lb/ft3
False
True or false
Tare weight (TW) is the weight of a cylinder when it is filled with water
False
True or false
The weight of a substance is the product of the substances, mass and the force of gravity, pulling down on it
True
Charles law can be expressed as
V1/T1=V2/T2
True
The density of a substance multiplied by its specific volume will always see a product of 1
True
ft3/lb=
Specific volume
3413 BTUs/hr
1KW
746 watts
1 hp (horsepower)
Lb/ft3=
Density
Unitless number
Specific gravity
Ft-lb=
Work
The specific volume of dry air is 13.33 ft.³/lb. what is its density?
1/13.33=0.07 lb/ft3
Specific volume is the term used to…
Indicate the amount of space that the weight of gas will occupy
How many BTUs are there in 12 kW of electrical power?
3413×12 = 40,956
When discarding disposable cylinders of CFC’s, HCFCs, HFC’s or HFO’s….
All of the above
True or false
Only a few ounces of refrigerant mixed with nitrogen is considered a leak Trace gas and may be released without recovery
True
When calculating cylinder capacity at what temperature is the value of the liquid density of the refrigerant used?
130°F
True or false
R-744 carbon dioxide CO2 generally does not need to be recovered
True
Records of leak inspections, initial leak verification, and follow up verification test must be kept on file for three years. Who maintains those records?
The owner/operator of the equipment
True or false
The weight of a substance is the product of the substances, mass and the force of gravity, pulling down on it
True
