Week 1 - Level 1 Review Flashcards
How many pounds (lbs) in a US gallon?
8.34 lbs
What is the sensible heat of air formula?
BTU = 1.08 * CFM * deltaT
What is the latent heat of vaporization of water?
970 btu/lb
How many Watts is 1 HP?
746 Watts
How many btu/hr is 1 HP?
42.42 btu/hr
How many ft-lbs/min is 1 horsepower?
33,000 ft-lbs/min
How many ft-lbs is 1 BTU?
778 ft-lbs
How many feet in a meter?
3.28 feet
How much does 1 cubic foot of water weigh?
62.4 lbs
How much does 1 cubic foot of air weigh?
0.074 lbs
How much is 1 (US) ton?
2000 lbs
What is atmospheric pressure in psia?
14.696 psia
What is atmospheric pressure in “Hg (inches of mercury)?
29.921
What is atmospheric pressure in kPa?
101.325 kPa
How many microns is atmospheric pressure?
760,000 microns
What is specific gravity?
The ratio of the mass of a certain volume of liquid or gas compared to the mass of an equal volume of water (liquid) or air (gas).
What is measurement is an absolute scale and corresponds with Fahrenheit? How many units are they offset?
Rankine and 460
What is measurement is an absolute scale and corresponds with Celsius? How many units are they offset?
Kelvin and 273
What is the formula for converting atmospheric pressures?
Convert to x reference number
Convert From
A substance that is a chemical combination of 2 or more elements is called a ____________
Compound
What are the 3 parts of an atom?
- Proton
- Neutron
- Electron
What is a substance made of only 1 type of atom called?
Element
What is the smallest particle of a compound that retains the identity of the compound called?
Molicule
What is the force that binds molecules together?
Molecular Cohesion
What is the formula for determining the amount of leverage needed?
F1 D1 = F2 D2
Where
F = Force
D = Distance
What is the formula for calculating pressure?
Pressure = Force / Area
What is adiabatic compression?
The compressing of a gas without gaining heat from or losing heat to its surroundings.
What is Pascal’s Law?
Force in gas is equal in all directions.
What is Refrigeration?
The achievement of a temperature below that of the immediate surroundings.