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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
Q

Measurements comparing the pressure of a vapor space above the liquid level and the pressure at the bottom of the same vessel is called

A

Hydrostatic pressure measurement

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26
Q

The highest energy cost of operation is associated with which of these flow elements?

A

Orifice plate

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27
Q

Weir and parshall flume are types of

A

Open channel flow devices

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28
Q

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

A

Flat bottom – cylinder

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29
Q

Displacer tube uses the principle of _____ To determine level

A

Buoyancy

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30
Q

Most important characteristic affecting The measurement of the fluid flow

A

State of matter – liquid, gas or vapor

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31
Q

Considered non-– compressible

A

Liquids

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32
Q

Mass per unit volume

A

Density

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33
Q

Property of fluid that normally decreases with increasing temperature

A

Viscosity

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34
Q

Has sharp edge, engineered, round hole and design information stamped on protruding tab

A

Orifice plate

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35
Q

Venturi, pitot,Orifice plate

A

Primary flow elements

36
Q

Charles, boyles adn gay -lussac are primary in formulating the laws of gas behavior that are used today

A

True

37
Q

The secondary control variable in cascade loops

A

Flow

38
Q

The pressure developed by a head of liquid will increase with higher density liquids as compared to lower density liquids

A

True

39
Q

Smooth flowing fluid typically at lower rates

A

Laminar flow

40
Q

Fluid flow with no streamlined and three intermixing

A

Turbulent flow

41
Q

Most common primary flow element used in differential pressure measurement systems

A

Orifice plate

42
Q

Measures Flow using a metal disc with a precise of hole

A

Orifice plate

43
Q

Measures flow using a tapered in the device inserted into a flange connection or sport piece

A

Flow nozzle

44
Q

Measures flow using a precisely tapered and outlet reduction in pipe diameter

A

Venturi tube

45
Q

Measured flow by comparing pressure of an L shaped tube into the flow and another static pressure to for comparison

A

Pitot tube

46
Q

Pressure developed by a head of liquid will increase with higher density liquids as compared to lower density liquids

A

True

47
Q

A displacer tube uses the principle of_________ To determine level

A

Buoyancy

48
Q

Expressed in distance per unit of time example inches/seconds

A

Rectilinear speed

49
Q

Bimetallic strip thermometers work because of different electrical coefficients between the two metals

A

False

50
Q

The more heat energy added to a liquid

A

The greater the pressure exerted on vessel walls

51
Q

When a fixed number of molecules are spread out over a larger unit area

A

Pressure decreases

52
Q

Capacitance Transducers indicate pressure changes as opposing plates move closer and farther from each other

A

True

53
Q

Manner in which heat moves through solid matter

A

Conduction

54
Q

In a state of thermal equilibrium

A

No heat exchange occurs

55
Q

As the force of a fix the area increases, you would expect

A

The pressure to increase

56
Q

Factors affecting the force exerted by molecules on each other include

A

Speed
Density
Mass

57
Q

The symbol I slash P refers to

A

Electrical current to air pressure signal conversion

58
Q

Force divided by the area over which it is applied

A

Pressure

59
Q

Changes or tends to change state of rest or motion

A

Force

60
Q

Flows and takes shape of the container

A

Fluid

61
Q

Force from weight of the atmosphere

A

Atmospheric pressure

62
Q

Single Value reflecting the difference into individual readings

A

Differential pressure

63
Q

14.7 PSIA

A

Sea level pressure

64
Q

Pressure difference indicated by Liquid levels in U – shaped tube

A

Manometer

65
Q

C – shaped hollow, elliptical tube

A

Bourdon tube

66
Q

Density index when compared to water

A

specific gravity

67
Q

In the bubble tube system, Differential pressure is first measured and then translated to a level of measurement

A

True

68
Q

A variable measurement changes in a continuous men are mirroring the actual variable

A

Analog

69
Q

Compares set point to variable measurement

A

Control element

70
Q

Impacts the variable directly, usually changes flow of energy or material

A

Final element

71
Q

Usually for relatively simple process

A

Open loop

72
Q

Control system provides feedback

A

Closed loop

73
Q

There is a continuous update of variable value changes in this type

A

Closed loop

74
Q

A measure of the thermal energy in the process

A

Temperature

75
Q

Movement of materials, liquid, solid or gas

A

Flow

76
Q

Measure of the force applied to an area

A

Pressure

77
Q

Measured along a vertical axis

A

Level

78
Q

Determined by physical properties, quality or traits

A

Composition

79
Q

Can’t cause a problem

A

Indicator

80
Q

Packets of ones and zeros

A

Digital

81
Q

Air/gas signal pressure

A

Pneumatic

82
Q

Is often combined with the primary element

A

Transmitter

83
Q

Increase in boiling point

A

Process conditions with little variation

84
Q

Force applied over a certain area

A

Pressure

85
Q

Which is the hardest working variable?

A

Flow

Instrumentation Key Terms (5 decks)

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