Module 1: Pressure Measurement

Question 1

Organizations that transform one substance into another

Answer 1

PROCESS INDUSTRIES

Question 2

Common reasons process industries measure pressure

Answer 2

1. Safety
2. Process Efficiency
3. Cost-savings
4. Inferred measurement of other variables

Question 3

Inferred measurements of other variables

Answer 3

1. How 2 or more liquids in a tank interface
2. Rate of flow
3. Level of fluid
4. Density of fluid

Question 4

Amount of force applied over defined area

Answer 4

PRESSURE

Question 5

___ increases if force increases or area over force decreases

Answer 5

PRESSURE

Question 6

3 Factors influencing pressure exerted by liquid

Answer 6

Depth of liquid, density of liquid, pressure on the surface of liquid

Question 7

Pressure is affected by the —-, rather than the volume of liquid

Answer 7

DEPTH

Question 8

Mass of substance per unit volume

Answer 8

DENSITY

Question 9

higher density liquids are — per unit volume

Answer 9

HEAVIER

Question 10

Ratio of density of liquid to density of water at same temperature

Answer 10

SPECIFIC GRAVITY

Question 11

Pressure exerted above column of liquid being measured

Answer 11

PRESSURE ON THE SURFACE OF A LIQUID

Question 12

2 Factors affecting pressure exerted by gas

Answer 12

1. Volume of container
2. Temperature of gas

Question 13

Liquids and gases are referred as

Answer 13

FLUIDS

Question 14

describes how pressure of gas tends to increase as volume of container decreases

Answer 14

BOYLE’S LAW

Question 15

Absolute pressure inversely proportional to volumw

Answer 15

BOYLE’S LAW

Question 16

Describes how gases tend to expand when heated

Answer 16

CHARLE’S LAW

Question 17

Two categories of pressure units

Answer 17

1. Units of force over area
2. Units referenced to column of fluid

Question 18

3 reference pressures

Answer 18

ABSOLUTE
GAUGE
DIFFERENTIAL

Question 19

Compared measured pressure to a perfect vacuum. Can never be negative

Answer 19

ABSOLUTE PRESSURE

Question 20

Uses the pressure of surrounding atmosphere as reference pressure

Answer 20

GAUGE PRESSURE

Question 21

Uses a second process pressure as reference pressure. It is also often used to infer rate of flow thru pipe

Answer 21

DIFFERENTIAL PRESSURE

Question 22

3 TYPES OF MEASURABLE PRESSURE

Answer 22

HEAD PRESSURE
STATIC PRESSURE
VAPOR PRESSURE

Question 23

known as HYDROSTATIC PRESSURE

Answer 23

HEAD PRESSURE

Question 24

Pressure exerted by a column of fluid

Answer 24

HEAD PRESSURE

Question 25

line pressure

Answer 25

STATIC PRESSURE

Question 26

pressure exerted in closed system

Answer 26

STATIC PRESSURE

Question 27

pressure used in line applications

Answer 27

STATIC PRESSURE

Question 28

transformation of a substance from liquid state to gas state

Answer 28

VAPORIZATION

Question 29

Pressure measurement can be used to infer

Answer 29

FLOW
LEVEL
DENSITY MEASUREMENT
THE WAY DIFF. FLUIDS INTERFACE A VESSEL

Question 30

Fluid speeds up to bypass ab obstruction, pressure drops

Answer 30

BERNOULLI’S PRINCIPLE

Question 31

boundary between two immiscible fluids w/ different densities

Answer 31

INTERFACE

Question 32

2 TYPES OF PRESSURE GAUGES

Answer 32

1. LIQUID COLUMN GAUGES
   -height of the column varies
2. MECHANICAL PRESSURE GAUGES
   -have mechanical parts that move

Question 33

2 types of liquid column pressure gauges

Answer 33

BAROMETER
MANOMETER