A B OE Engineers use several different scales for pressure. Standard atmospheric pressure, which is the air pressure at sea level. Absolute pressure is referenced to regions such as outer space, where the pressure is essentially zero because the region is devoid of gas. When pressure is measured relative to prevailing local atmospheric pressure, the pressure value is called gage pressure. Describe the relationship of the 3 different scales for pressure. A. Pabs =Pgage + Pvacuum B. Patm = Pgage + Pabs C. Pabs Patm + Pgage D. Pgage Pabsolute + Patm E. None of the above
A B OE Engineers use several different scales for pressure. Standard atmospheric pressure, which is the air pressure at sea level. Absolute pressure is referenced to regions such as outer space, where the pressure is essentially zero because the region is devoid of gas. When pressure is measured relative to prevailing local atmospheric pressure, the pressure value is called gage pressure. Describe the relationship of the 3 different scales for pressure. A. Pabs =Pgage + Pvacuum B. Patm = Pgage + Pabs C. Pabs Patm + Pgage D. Pgage Pabsolute + Patm E. None of the above
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:O A
B
C
Engineers use several different scales for pressure. Standard
atmospheric pressure, which is the air pressure at sea level. Absolute
pressure is referenced to regions such as outer space, where the
pressure is essentially zero because the region is devoid of gas. When
pressure is measured relative to prevailing local atmospheric pressure,
the pressure value is called gage pressure.
Describe the relationship of the 3 different scales for pressure.
A. Pabs =Pgage + Pvacuum
B. Patm=Pgage + Pabs
C. Pabs Patm + Pgage
D. Pgage Pabsolute + Patm
E. None of the above
Transcribed Image Text:O A
O
B
D
OE
Derive a formula for the pressure difference pa - P, in terms of the
system parameters in the figure shown.
A. Pa Pa (P₂-P₁)h
C. Pa-Pb (P₂-P₁)gl
E. None of the above
P₁
L
h
Flow device
(b) -
B. Pa Ps= (y₂ - Y₁)h
D. Pa-Pb (₂-₁)gL
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