# EET 293 - Hydraulics and Pneumatics

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1. what is the formula for gamma (γ)?
γ= weight / velocity

γ= density * gravity

γ= specific weight
2. what does the greek symbol gamma stand for?
3. γ = specific weight
4. what is the formula for weight?
5. w = mass * gravity
6. what is the formula for force?
Force = mass * acceleration

force = pressure * area
7. what is the formula for pressure?
pressure = (force) / (area)

pressure = weight / area

pressure = gamma * height
8. what is specific gravity?
Specific gravity is the ratio of the density of a substance compared to the density (mass of the same unit volume) of a reference substance. Apparent specific gravity is the ratio of the weight of a volume of the substance to the weight of an equal volume of the reference substance. The reference substance is nearly always water for liquids or air for gases
9. what is the specific gravity formula for hydraulic oil?
10. SG = γ of oil  /  γ of water
11. What is the specific weight of water?
SG H2O = 62.4 lb/ft3

• SG H2O = 9800 N/m3
12. what is "rho"?
13. Density
14. what is the formula for density?
ρ = mass / velocity

ρ = gamma / gravity
15. what is the value of atmospheric pressure?
14.7 psia

0 psig
16. what is "mu"?
μ = viscosity.

μ abs = absolute (dynamic) viscosity
17. what is the unit for absolute (dynamic) viscosity?
18. μ = pascal-second (Pa·s) (equivalent to N·s/m2, or kg/(m·s))
 Author: sanjer ID: 215574 Card Set: EET 293 - Hydraulics and Pneumatics Updated: 2013-04-24 21:48:18 Tags: EET 293 Hydraulics Pneumatics Folders: Description: EET 293 - Hydraulics and Pneumatics Show Answers: