FINALS TERMINOLOGY

Question 1

Has an atmospheric surface in one or two leg and is capable of
measuring gauge pressures.

Answer 1

Open Type Manometer

Question 2

Without an atmospheric surface and capable of measuring only
difference of pressure

Answer 2

Differential Type Manometer

Question 3

Simple vertical tube fixed to a system whose pressure is to be
measured.

Answer 3

Piezometer Manometer

Question 4

• A physical science dealing with the action of fluids at rest or in motion
• It provides the basic foundation for hydraulics

Answer 4

Fluid Mechanics

Question 5

A branch of science that deals with the flow of fluids, particularly liquids, in
pipes and channels

Answer 5

Hydraulics

Question 6

• Also known as the mass density
• Mass of a substance per unit volume

Answer 6

DENSITY ; ρ (rho)

Question 7

• Also known as the unit weight
• Weight of a unit volume of a fluid
• Force exerted by the earth’s gravitation

Answer 7

SPECIFIC WEIGHT ; γ (gamma)

Question 8

• Also known as relative density
• Ratio of a fluid’s density to some
  standard density.
• For liquids, reference is water while for
  gases, reference is air.
• Specific gravity has no unit

Answer 8

SPECIFIC GRAVITY ; SG

Question 9

Volume occupied by a unit mass of a
fluid
- Reciprocal of density, commonly used in
gases.

Answer 9

SPECIFIC VOLUME ; Vs

Question 10

Force exerted per unit area by a liquid or gas on a body or surface in pascal

Answer 10

PRESSURE; P

Question 11

“At any point in a fluid at rest the pressure is the same in all direction”

Answer 11

Pascal’s Law:

Question 12

• The pressure measured by means of gauges or manometer above or
  below the atmospheric level
• At sea level under normal conditions, or at free surface, Pg = 0

Answer 12

Gauge Pressure ; (Pg or P)

Question 13

• The pressure at any one point on the earth’s surface from the weight
  of the air above it
• At sea level under normal conditions, or at free surface, Patm =
  101.325 KPa or 760mmHG

Answer 13

Atmospheric Pressure ; (Patm)

Question 14

• The pressure measured above absolute zero

Answer 14

Absolute Pressure ; (Pabs)

Question 15

Height of a column of homogenous fluid of specific weight that will
produce an intensity of pressure

Answer 15

Pressure head; (h)

Question 16

A pressure measuring technique by means of tubes usually in the
shape of “U”

Answer 16

Manometer

Question 17

The hydrostatic force is always ___ to the surface

Answer 17

Perpendicular

Question 18

The distance of the center of pressure (cp) below the
center of gravity (cg) along the body or surface (in m)

Answer 18

Eccentricity

Question 19

____ are structures that block the
flow of a river, stream or other
waterways

Answer 19

Dams

Question 20

Any body immersed in a fluid is acted by a
buoyant force (upward) which is equal to the
weight of fluid displaced

Answer 20

Archimedes’ Principle