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Instrumentation Key Terms > Section 1 Test > Flashcards

Section 1 Test Flashcards

1
Q

Uses of nitrogen in a process unit include:

A

All of these

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2
Q

A vibration measuring device

A

Accelerometer

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3
Q

Expressed in the distance per unit of time

A

Rectilinear speed

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4
Q

Safety system that measures vibration compared to critical parameters often with shut down set points

A

Vibration sensors

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5
Q

A measure of total organic or carbon element in the process up

A

Total carbon TOC

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6
Q

Air compressor discharge is routed to a knock out drum

A

To allow moisture to form droplets and collect in the drum

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7
Q

molecular components of a fluid or separated and identified in a column

A

Chromatography

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8
Q

Measures the fluids ability to conduct electrical current

A

Conductivity

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9
Q

Separating gases into a spectrum according to mass and charge

A

Mass spectrometry

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10
Q

Measurement of hydrogen ion concentration

A

PH

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11
Q

Online unattended instrument that continually monitors process stream for specific para meters

A

Process analyzer

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12
Q

Contains portions of the process combined over time or distance

A

Representative sample

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13
Q

Safe reliable and efficient process operation requires that instrument air be:

A

Clean, dry and reliable

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14
Q

Constant monitoring and analysis of processes is necessary to ensure environmental protection, height mechanical integrity, specific quality of products and __________

A

Profitability

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15
Q

The primary difference between 100 PV is IG utility air and 100 psi G instrument air is moisture content

A

True

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16
Q

If the mass remains constant and the density of the liquid in a tank decreases, the level of the liquid In the tank

A

Increases

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17
Q

Fluid in motion is called_______

A

Flow

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18
Q

A variable area flow meter is a

A

Rotameter

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19
Q

Mass flow meter require

A

No need to compensate for variations in temperature,pressure density and viscosity

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20
Q

Tape float, bubbler, cable+ weight, D/P cell and displacer are examples of what kind of measurement system?

A

Continuous level measurement

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21
Q

The primary purpose of the Jorgensen type valve used at top and bottom overheated level gauge glass is

A

To prevent certain release of pressure and fluids in case of glass rupture

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22
Q

Magnet of flow meters require

A

Electrically conductive fluid

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23
Q

Flow rate it’s most often calculated by

A

Measuring changes in another variable that varies predictably with changes in flow

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24
Q

The zone of separation between two inmiscable liquids in a vessel is called the

A

Interface

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25
Measurements comparing the pressure of a vapor space above the liquid level and the pressure at the bottom of the same vessel is called
Hydrostatic pressure measurement
26
The highest energy cost of operation is associated with which of these flow elements?
Orifice plate
27
Weir and parshall flume are types of
Open channel flow devices
28
Which of these vessel configurations yields a uniform unit of volume to unit of level relationship? Each inch of level represents the same volume as every other
Flat bottom – cylinder
29
Displacer tube uses the principle of _____ To determine level
Buoyancy
30
Most important characteristic affecting The measurement of the fluid flow
State of matter – liquid, gas or vapor
31
Considered non-– compressible
Liquids
32
Mass per unit volume
Density
33
Property of fluid that normally decreases with increasing temperature
Viscosity
34
Has sharp edge, engineered, round hole and design information stamped on protruding tab
Orifice plate
35
Venturi, pitot,Orifice plate
Primary flow elements
36
Charles, boyles adn gay -lussac are primary in formulating the laws of gas behavior that are used today
True
37
The secondary control variable in cascade loops
Flow
38
The pressure developed by a head of liquid will increase with higher density liquids as compared to lower density liquids
True
39
Smooth flowing fluid typically at lower rates
Laminar flow
40
Fluid flow with no streamlined and three intermixing
Turbulent flow
41
Most common primary flow element used in differential pressure measurement systems
Orifice plate
42
Measures Flow using a metal disc with a precise of hole
Orifice plate
43
Measures flow using a tapered in the device inserted into a flange connection or sport piece
Flow nozzle
44
Measures flow using a precisely tapered and outlet reduction in pipe diameter
Venturi tube
45
Measured flow by comparing pressure of an L shaped tube into the flow and another static pressure to for comparison
Pitot tube
46
Pressure developed by a head of liquid will increase with higher density liquids as compared to lower density liquids
True
47
A displacer tube uses the principle of_________ To determine level
Buoyancy
48
Expressed in distance per unit of time example inches/seconds
Rectilinear speed
49
Bimetallic strip thermometers work because of different electrical coefficients between the two metals
False
50
The more heat energy added to a liquid
The greater the pressure exerted on vessel walls
51
When a fixed number of molecules are spread out over a larger unit area
Pressure decreases
52
Capacitance Transducers indicate pressure changes as opposing plates move closer and farther from each other
True
53
Manner in which heat moves through solid matter
Conduction
54
In a state of thermal equilibrium
No heat exchange occurs
55
As the force of a fix the area increases, you would expect
The pressure to increase
56
Factors affecting the force exerted by molecules on each other include
Speed Density Mass
57
The symbol I slash P refers to
Electrical current to air pressure signal conversion
58
Force divided by the area over which it is applied
Pressure
59
Changes or tends to change state of rest or motion
Force
60
Flows and takes shape of the container
Fluid
61
Force from weight of the atmosphere
Atmospheric pressure
62
Single Value reflecting the difference into individual readings
Differential pressure
63
14.7 PSIA
Sea level pressure
64
Pressure difference indicated by Liquid levels in U – shaped tube
Manometer
65
C – shaped hollow, elliptical tube
Bourdon tube
66
Density index when compared to water
specific gravity
67
In the bubble tube system, Differential pressure is first measured and then translated to a level of measurement
True
68
A variable measurement changes in a continuous men are mirroring the actual variable
Analog
69
Compares set point to variable measurement
Control element
70
Impacts the variable directly, usually changes flow of energy or material
Final element
71
Usually for relatively simple process
Open loop
72
Control system provides feedback
Closed loop
73
There is a continuous update of variable value changes in this type
Closed loop
74
A measure of the thermal energy in the process
Temperature
75
Movement of materials, liquid, solid or gas
Flow
76
Measure of the force applied to an area
Pressure
77
Measured along a vertical axis
Level
78
Determined by physical properties, quality or traits
Composition
79
Can’t cause a problem
Indicator
80
Packets of ones and zeros
Digital
81
Air/gas signal pressure
Pneumatic
82
Is often combined with the primary element
Transmitter
83
Increase in boiling point
Process conditions with little variation
84
Force applied over a certain area
Pressure
85
Which is the hardest working variable?
Flow

Instrumentation Key Terms (5 decks)

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