CHAPTER 2: Principles of Hydrostatics Flashcards
It is the force per unit area exerted by
a liquid or gas on a body or surface,
with the force acting at right angles to
the surface uniformly in all directions.
PRESSURE
The Pascal’s law states that “the pressure or __________ of pressure at a point in a static fluid is _________in all direction”.
intensity; equal
Pascal’s law states that if pressure is applied to a ________ fluid in a container, then that pressure is transmitted equally in all directions within the container
non-flowing
pressure above or below the atmosphere
and can be measured by pressure gauges or manometers
Gauge pressure
pressure at any point on the
earth’s surface from the weight of the air above it
Atmospheric pressure
pressure above absolute zero (vacuum)
Absolute pressure
in any homogenous fluid at rest, the pressures at all points along the same _____________ are equal.
horizontal plane
the pressure at any depth h below a _________surface at rest is equal to the product of the unit weight of fluid and the depth h.
continuous free fluid
a pressure applied at
any point in a liquid at rest is transmitted equally and _________ to every other point in the liquid.
undiminished
It is the height of column of homogenous fluid of unit weight that will produce an intensity of pressure
pressure head
It is a simple and inexpensive
device of measuring pressure and
pressure difference.
manometer
It is usually bent
to form a U-tube and filled with liquid
of known specific gravity.
manometer
It is the simplest form of manometer
which is tapped into the wall of pressure
conduit for purpose of measuring pressure.
piezometer
Though effective in many purposes,
__________ is not practical to use in
lighter liquids with large pressure and
cannot be used to measure gas pressure
piezometer
It is a tube bent into a U-shape to
contain one or more fluids of different
specific gravities. It is used to measure
pressure.
open manometer
It cannot measure pressure
but can measure pressure
difference.
Differential Manometer
