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WorksheetsAnalyzers and Sensors Worksheet (Grade 13)
Total questions: 139
Worksheet time: 1hrs 10mins
What does an ultraviolet (UV) analyzer measure?
It measures the concentration of a gas based on its ability to conduct heat.
It measures the pressure of gases in the ultraviolet spectrum.
It analyzes the temperature of a gas sample using UV radiation.
None of them
What is the primary function of a gas analyzer?
To measure humidity in the air
To detect and quantify gases in a mixture
To analyze the pH of a liquid
To measure solid particle size
Which of the following gases is commonly measured by a gas analyzer in industrial applications?
Oxygen (O₂)
Nitrogen (N₂)
Carbon monoxide (CO)
All of the above
What principle does an infrared (IR) gas analyzer use to measure gas concentration?
Absorption of infrared radiation
Conductivity measurement
Chemical reaction
Weight analysis
Which principle does a capacitive humidity sensor use to measure moisture content?
Change in electrical capacitance due to water vapor absorption
Absorption of infrared radiation
Chemical reaction with water molecules
Measurement of air pressure changes
What is the most common unit used to express humidity in the air?
Parts per million (ppm)
Kilograms per cubic meter (kg/m³)
Percentage relative humidity (%RH)
Pascal (Pa)
In a solid analyzer, what property of solid samples is typically measured?
pH level
Conductivity
Particle size distribution
Viscosity
What type of analysis is often performed using a liquid analyzer?
Gas concentration in liquids
Solid particle detection
pH, conductivity, and dissolved oxygen measurement
Air humidity levels
Which type of sensor is most commonly used in liquid analyzers to measure pH levels?
Thermocouple
Glass electrode sensor
Pressure transducer
Optical sensor
In a moisture analyzer, what method is commonly used to determine water content in a sample?
UV spectroscopy
Gravimetric heating and weight loss
Magnetic resonance imaging
Electrochemical reaction
Which of the following is NOT a common application of gas analyzers?
Environmental monitoring
Industrial safety
Blood pressure measurement
Process control in refineries
What principle does a thermal conductivity gas analyzer use?
Uses UV radiation
Measures electrical conductivity
Determines oxygen levels with a zirconium sensor
Compares heat conduction of the sample gas with a reference gas like nitrogen or air
Which analyzers are the most complex in industrial processes?
Gas analyzers
Process analyzers that provide continuous monitoring and automatic calibration
Viscosity meters
Temperature sensors
What parameter does a psychrometer measure?
Humidity using wet and dry bulb thermometers
Oxygen concentration
Gas density
Liquid pressure
What does a hydrometer measure?
Viscosity
Liquid density by floating at a level corresponding to its calibrated scale
Electrical conductivity
Surface tension
How does a zirconium oxide oxygen analyzer work?
Detects CO2
Measures turbidity
Generates an electric current due to oxygen ion migration
Detects radiation
What is the function of an opacity analyzer?
Measures heat transfer
Detects sound waves
Uses a light beam to measure particulate density in gases
Works only in a vacuum
What does a near-infrared (NIR) moisture analyzer measure?
Gas concentration
Reflectance of materials to determine moisture content
Electrical conductivity
Polymer melting point
Why is sample transportation lag important?
Allows gases to cool
Separates impurities
Represents delay between sampling and analysis, affecting accuracy
Ensures dry air is analyzed
What is the purpose of a vibrating U-tube density analyzer?
Determines liquid density by analyzing frequency changes in a vibrating tube
Detects oxygen in water
Measures sound reflection
Identifies chemical color changes
How does a nuclear solids moisture analyzer work?
Uses UV light
Measures neutron speed to detect moisture in solids
Relies on chemical reactions
Heats the sample to evaporate moisture
A laboratory device that measures kinematic viscosity by timing how long a liquid flows through an orifice.
Newtonian Liquids
Rheometer
Percent Solids
Saybolt Universal Viscometer
What is the main difference between a hygrometer and a thermohygrometer?
A hygrometer measures only humidity, while a thermohygrometer measures only temperature.
A hygrometer measures air humidity, while a thermohygrometer measures both humidity and temperature, providing more comprehensive information about the microclimate.
A thermohygrometer is an outdated version of a hygrometer and is no longer used.
Both devices measure the same parameters but use different technologies.
What is gravimetric moisture analysis?
A method that measures moisture levels by detecting changes in air pressure.
A technique that determines moisture content by measuring weight loss after drying.
A process that analyzes moisture using infrared light absorption.
A method that calculates moisture levels by measuring electrical conductivity.
What is a hygroscopic material?
A material that repels moisture regardless of humidity changes.
A material that absorbs moisture only in extremely humid conditions.
A material that absorbs and retains moisture as humidity increases and releases moisture as humidity decreases, undergoing physical changes based on moisture content.
A material that remains unaffected by environmental humidity.
What is a slurry?
A liquid with dissolved gases.
A thick paste made of only liquid and air.
A liquid containing suspended solids that are heavier than the liquid.
A solid material mixed with dry particles.
What is the difference between Newtonian and non-Newtonian liquids?
Newtonian liquids turn solid under force, non-Newtonian stay liquid.
Newtonian liquids have constant viscosity, non-Newtonian change viscosity under force.
Newtonian liquids are always thicker than non-Newtonian liquids.
Non-Newtonian liquids always have lower viscosity.
What is absolute viscosity?
The speed at which a fluid flows.
The resistance to flow of a fluid, measured in centipoise (cP).
The density of a fluid.
The temperature at which a fluid evaporates.
What is kinematic viscosity?
The thickness of a fluid.
The ratio of absolute viscosity to fluid density, measured in centi-stokes (cS).
The resistance of a fluid to compression.
The speed at which a fluid flows through a pipe.
What is the refractive index?
The speed of light in a vacuum.
The amount of bending of a light beam as it moves between fluids with different refractive index values.
The intensity of light passing through a material.
The measure of a fluid’s viscosity.
What does a pressure gauge do?
Measures the flow rate of a liquid.
Measures the pressure of a fluid in a system.
Controls the temperature of gases.
Regulates the density of a substance.
What is the purpose of sample transportation lag in an analyzer sampling system?
It helps in calibrating the analyzer.
It ensures pure samples reach the analyzer.
It refers to the delay between extraction and analysis, affecting accuracy.
It prevents contamination with filtration.
What distinguishes a thermoparamagnetic oxygen analyzer from a paramagnetic one?
The thermoparamagnetic analyzer is for liquid samples, the paramagnetic for gases.
The thermoparamagnetic analyzer creates a “magnetic wind” to move gas, while the paramagnetic one uses a dumbbell assembly.
The thermoparamagnetic analyzer is less accurate.
The thermoparamagnetic analyzer works only at high temperatures.
How does an opacity analyzer measure gas concentration?
It detects gas sample mass.
It calculates concentration from temperature changes.
It measures electric current from gas molecules.
It uses a collimated light source and measures received intensity.
Why is analyzer calibration necessary?
It replaces normal samples with known ones for accuracy.
It allows manual gas flow adjustments.
It eliminates the need for maintenance.
It ensures correct oxygen measurements.
What distinguishes a falling piston viscosity analyzer?
It measures viscosity by rotating a spindle in the liquid.
It determines viscosity by detecting light scattering.
It uses a heated cylinder to analyze polymer flow.
It measures viscosity based on the time a piston takes to fall through a liquid.
What is the function of a turbidity analyzer?
It measures the refractive index of a liquid.
It determines the amount of suspended solids by measuring light scattering.
It analyzes viscosity using a rotating spindle.
It detects density variations using a radioactive source.
How does a Saybolt universal viscometer measure viscosity?
By measuring the natural frequency of a vibrating U-tube.
By detecting the torque required to rotate a spindle in a liquid.
By timing the flow of a liquid through an orifice in a temperature-controlled vessel.
By analyzing the resistance of a falling piston in a liquid sample.
What is the purpose of a displacement hydrometer?
To measure turbidity in liquids with suspended particles.
To analyze viscosity by applying a constant force.
To determine liquid density using a fixed-weight cylinder supported by a spring.
To measure the refraction of light through a liquid.
What does a refractive index analyzer measure?
The density of a liquid by using gamma radiation.
The viscosity of a non-Newtonian fluid.
The bending of light as it moves between fluids with different refractive indices.
The percentage of solids in a slurry.
What is the critical angle in refractive index measurement?
The angle at which the highest turbidity occurs.
The angle at which viscosity reaches its maximum value.
The angle at which there is no refraction, and all light is reflected.
The angle at which measurements are inaccurate.
Absolute humidity, or humidity ratio is the ratio of the mass of water vapor to the mass of dry air. Given: mass of water vapor is 30, mass of dry air is 10, find the absolute humidity using the formula:
8
20
10
3
Absolute humidity, or humidity ratio is the ratio of the mass of water vapor to the mass of dry air. Given: mass of water vapor is 350, mass of dry air is 70, find the absolute humidity using the formula:
6
5
7
10
Absolute humidity, or humidity ratio is the ratio of the mass of water vapor to the mass of dry air. Given: mass of water vapor is 500, mass of dry air is 25, find the absolute humidity using the formula:
20
40
55
60
Absolute humidity, or humidity ratio is the ratio of the mass of water vapor to the mass of dry air. Given: mass of water vapor is 25, mass of dry air is 5, find the absolute humidity using the formula:
4
3
15
5
Absolute humidity, or humidity ratio is the ratio of the mass of water vapor to the mass of dry air. Given: mass of water vapor is 77, mass of dry air is 10, find the absolute humidity using the formula:
8.6
9.3
7.7
5.0
Relative humidity (rh) is the ratio of the actual amount of water vapor in the air to the maximum amount of water vapor possible at the same temperature. Given: actual amount is 25, maximum amount is 100, find the relative humidity using the formula:
45
50
75
25
Relative humidity (rh) is the ratio of the actual amount of water vapor in the air to the maximum amount of water vapor possible at the same temperature. Given: actual amount is 20, maximum amount is 200, find the relative humidity using the formula:
10
20
30
40
Relative humidity (rh) is the ratio of the actual amount of water vapor in the air to the maximum amount of water vapor possible at the same temperature. Given: actual amount is 15, maximum amount is 75, find the relative humidity using the formula:
20
30
40
50
Relative humidity (rh) is the ratio of the actual amount of water vapor in the air to the maximum amount of water vapor possible at the same temperature. Given: actual amount is 16, maximum amount is 32, find the relative humidity using the formula:
50
80
90
70
Relative humidity (rh) is the ratio of the actual amount of water vapor in the air to the maximum amount of water vapor possible at the same temperature. Given: actual amount is 55, maximum amount is 220, find the relative humidity using the formula:
25
35
45
55
A kinematic viscosity is the ratio of absolute viscosity to fluid density, expressed in units of centi-stokes (cS). Given: absolute viscosity is 84 cP, fluid density is 21 g/cm^3, find the kinematic viscosity using the formula:
4
8
7
9
A kinematic viscosity is the ratio of absolute viscosity to fluid density, expressed in units of centi-stokes (cS). Given: absolute viscosity is 96 cP, fluid density is 32 g/cm^3, find the kinematic viscosity using the formula:
3
2
5
6
A kinematic viscosity is the ratio of absolute viscosity to fluid density, expressed in units of centi-stokes (cS). Given: absolute viscosity is 500 cP, fluid density is 25 g/cm^3, find the kinematic viscosity using the formula:
20
40
60
10
A kinematic viscosity is the ratio of absolute viscosity to fluid density, expressed in units of centi-stokes (cS). Given: absolute viscosity is 350 cP, fluid density is 50 g/cm^3, find the kinematic viscosity using the formula:
7
4
5
2
A kinematic viscosity is the ratio of absolute viscosity to fluid density, expressed in units of centi-stokes (cS). Given: absolute viscosity is 88 cP, fluid density is 10 g/cm^3, find the kinematic viscosity using the formula:
8.8
7
9.9
5
A microwave is the band of electromagnetic radiation between infrared and VHF broadcast frequencies, covering the range of approximately 3 mm to __ wavelength.
3 m
5 m
6 m
1 m
The critical angle is the one angle at which there is no refraction and all light is reflected, it means that angle is __ degree.
180
90
45
0
A recording psychrometer is a psychrometer consisting of wet and dry bulb thermometers connected to a __.
Recorder
Transmitter
Hydrometer
Hygrometer
A psychrometer is a humidity analyzer that uses two thermometers with the bulb of one thermometer kept moist (__) and the other bulb kept dry (dry bulb).
Wet Bulb
Analyzer
The most common terms used in humidity measurement
relative humidity
specific humidity
wet and dry temperatures
all of the above
What is the primary function of an intermediate relay?
To control high voltage directly
To isolate different sections of a circuit
To amplify a signal
To act as a direct switch for current
To monitor voltage levels
In what type of systems are intermediate relays most commonly used?
High-voltage transmission systems
Simple lighting circuits
Complex control systems, such as automation systems
Battery management systems
Direct current (DC) circuits
What does an intermediate relay typically do in a control system?
It provides backup power for the system
It amplifies the voltage
It controls multiple devices at once
It serves as a safety switch
It converts alternating current (AC) to direct current (DC)
What is one key feature of intermediate relays?
They are only used in low-voltage applications
They always have only one contact
They are used to handle high-current or high-voltage switching
They have multiple contact points to control multiple circuits
They are not reusable
Which of the following is an advantage of using an intermediate relay?
It directly powers the equipment it controls
It simplifies complex control circuits
It increases the load on the system
It eliminates the need for other relays
It only works with high-voltage circuits
What type of relay contacts are typically found in intermediate relays?
Normally Open (NO) contacts only
Normally Closed (NC) contacts only
Both Normally Open (NO) and Normally Closed (NC) contacts
Latching contacts
Temperature-sensitive contacts
Where are intermediate relays commonly used in automation systems?
To directly power motors
To isolate signals between controllers and actuators
To monitor temperature
To measure voltage fluctuations
To power sensors
What is the typical purpose of using an intermediate relay in a motor control circuit?
To provide a high-power signal to the motor
To delay the start-up of the motor
To handle multiple switch inputs from the control system
To measure motor speed
To switch between different power sources
Which of the following describes the operation of an intermediate relay?
It continuously draws power to maintain its state
It provides a switching action when an electrical impulse is received
It only operates at a specific temperature range
It automatically resets after every operation
It adjusts the voltage level of the circuit
How does an intermediate relay typically interact with a PLC (Programmable Logic Controller)?
It powers the PLC directly
It acts as a switch controlled by the PLC to operate other devices
It amplifies the PLC’s signal
It stores data for the PLC
It converts the PLC’s output to AC
Which of the following is NOT a typical use of an intermediate relay?
Switching large currents
Controlling multiple devices based on logic
Voltage regulation
Providing electrical isolation between circuits
Amplifying weak electrical signals
What does it mean when an intermediate relay has a "normally open" (NO) contact?
The relay is always on
The contact is closed when the relay is inactive
The contact is open when the relay is inactive
The contact opens after a certain time delay
The contact is used to interrupt the power supply
What is typically used as the control signal for an intermediate relay?
A constant power supply
A control signal from a sensor or PLC
A high-frequency oscillating current
A constant voltage input
A manual switch
In a control panel, how would you typically wire an intermediate relay to control an actuator?
By connecting the actuator directly to the relay coil
By connecting the actuator to the relay's contact points
By bypassing the relay completely
By using the relay to regulate the power supply to the actuator
By connecting the relay directly to the actuator's control circuit
What would happen if an intermediate relay is used incorrectly in a circuit?
It would cause excessive current to flow through the system
It would allow improper control of equipment, leading to system failure
It would overload the power supply
It would filter out unwanted signals
It would reduce the efficiency of the control system
How does an intermediate relay improve system reliability?
By acting as a fuse to prevent overloads
By providing multiple control points with a single input
By increasing the power capacity of the system
By isolating faults in one part of the system from affecting others
By reducing the need for a microcontroller
What type of contact mechanism is typically used in intermediate relays?
Solid-state contacts
Mechanical contacts
Optical contacts
Pneumatic contacts
Capacitive contacts
What is the main reason to use an intermediate relay instead of directly controlling a device?
To provide power conditioning
To reduce the need for direct control
To allow multiple devices to be controlled by a single signal
To improve the efficiency of the device being controlled
To automate the device’s operation
Which of the following could be a potential disadvantage of using an intermediate relay?
It makes the system more complex
It increases the power consumption of the system
It decreases the load capacity of the circuit
It makes the control signal more powerful
It requires frequent maintenance
What does an intermediate relay help achieve in terms of signal isolation?
It prevents high-frequency interference
It isolates control signals from the high-power load circuits
It isolates different types of signals (e.g., AC and DC)
It allows a signal to pass through without any changes
It isolates the relay's power supply from the system
What kind of applications would require an intermediate relay to operate in multiple stages?
Simple on/off control systems
Sequential processes, such as in manufacturing automation
Voltage regulation systems
Low-voltage household circuits
Single-function lighting control
What is typically used to trigger an intermediate relay in a circuit?
Manual switch operation
A continuous power supply
An impulse or control signal
A direct temperature measurement
A mechanical timer
What type of voltage is typically used to control an intermediate relay?
High voltage DC
Low voltage AC or DC
Medium voltage AC
High frequency voltage
Low frequency AC
Which of the following best describes a practical benefit of using intermediate relays in a system?
They increase the complexity of wiring in circuits
They enable safer and more efficient control of high-power equipment
They reduce the overall cost of circuit components
They eliminate the need for transformers in control systems
In what scenario would you need to use multiple intermediate relays in one control system?
When high voltages need to be directly controlled
When each relay controls a different part of the system independently
When no isolation is required
When only one control signal is used
When the system operates in a single-phase configuration
How does an infrared gas analyzer work?
It uses the ability of gas molecules to absorb infrared radiation at specific wavelengths, allowing the determination of gas concentration by measuring the change in light intensity.
It measures the temperature of the gas and compares it to reference values.
It operates based on the electrolysis of gas to determine its composition.
It uses mechanical sensors to assess gas density.
What method is used in a conductivity liquid analyzer?
It measures the electrical conductivity of a solution, determining ion concentration based on their ability to transmit an electric current through measuring electrodes.
It uses laser radiation to determine the molecular composition of the liquid.
It measures the liquid’s density using ultrasonic waves.
It analyzes the liquid’s color to evaluate its chemical composition.
What is the principle of operation of an optical humidity analyzer?
It determines the water vapor content in a gas mixture by measuring the absorption of light in the infrared or visible spectrum at specific wavelengths unique to water molecules.
It measures air mass and determines humidity based on pressure changes.
It estimates humidity based on the color change of a sensitive indicator.
It uses a temperature sensor to calculate air humidity.
How does a gas analyzer with an electrochemical sensor work?
It utilizes an electrochemical reaction between the gas and an electrolyte inside the sensor cell, generating an electrical signal proportional to the gas concentration.
It determines gas composition based on its viscosity and density.
It uses mechanical sensors to measure gas pressure.
It analyzes gas by heating it and observing flame color changes.
Which humidity measurement method is based on sensor capacitance change?
The capacitive humidity measurement method uses sensors with polymer or ceramic dielectrics, which change their dielectric permittivity depending on moisture content in the surrounding environment.
The humidity measurement method using a mercury thermometer.
The humidity analysis method by burning a sample and measuring the generated vapor.
The magnetic analysis method for detecting water vapor in the air.
How does an optical liquid quality analyzer work?
It utilizes laser or LED radiation to analyze the absorption and scattering spectrum of light in a liquid, enabling the determination of composition, impurities, and concentration of dissolved substances.
It measures the temperature of the liquid and compares it to reference values.
It evaluates the chemical composition of the liquid using ultrasonic probing.
It uses a mechanical probe to determine liquid density.
How does a mass flow gas analyzer with a correlation spectrometer work?
It measures gas flow by analyzing changes in its spectral characteristics as it passes through a measurement chamber, where interaction with laser radiation at multiple wavelengths occurs.
It determines gas velocity by measuring its pressure at different pipeline points.
It analyzes gas composition by measuring temperature after compression.
It uses a combustion chamber to assess energy release and gas composition.
How does an ultrasonic liquid analyzer determine its composition?
It measures the propagation speed of ultrasonic waves in the liquid, as it depends on the concentration of dissolved substances, density, and temperature, allowing the determination of liquid composition and quality.
It uses thermal sensors to measure liquid temperature and calculate composition.
It analyzes the liquid by mechanical compression and measuring elasticity.
It uses laser evaporation to determine the liquid’s chemical composition.
What is the working principle of a thermal conductivity gas analyzer?
It measures gas concentration by detecting changes in the medium’s thermal conductivity, as different gases have varying abilities to transfer heat, allowing determination of their composition and concentration.
It analyzes gas by dissolving it in a special liquid.
It measures the optical density of gas in the ultraviolet range.
It uses mechanical filters to assess the composition of a gas mixture.
How does a chilled mirror dew point analyzer work?
It determines the dew point temperature by cooling a mirror surface and detecting the moment when condensation forms on it, allowing precise measurement of moisture content in the gas.
It analyzes the dew point by measuring the viscosity of the gas.
It estimates humidity using a paper indicator that changes color.
It calculates humidity by measuring the oxygen content in the air.
What is the purpose of analysis in chemical compounds?
to identify the physical properties of materials
to determine the quantities of individual components in a mixture
to measure only electrical properties of a substance
to measure physical, chemical, or electrical properties to determine their composition and quantities
What is an on-line analyzer?
a device that collects gas samples for later analysis
a portable instrument for field chemical analysis
an instrument located in the process area that obtains frequent or continuous samples
laboratory-based instrument that requires manual sample collection
What is a sample transportation lag?
the time delay caused by errors in measurement
the time taken for a sample to reach the analyzer for final analysis
the waiting period before calibration of an analyzer
the time required for data processing in a gas analyzer
What factors are represented in a psychrometric chart?
dry bulb temperature and wet bulb temperature
dew point and relative humidity
absolute humidity and other moisture-related properties
all of the above
What is a viscosity analyzer used for?
to measure a liquid’s resistance to flow under specific conditions
to determine the refractive index of liquids
to analyze the gas concentration in a mixture
to measure the heat conductivity of solid materials
What is the function of a refractive index analyzer?
to analyze the density of gases using a pressure-sensitive detector
to measure the bending of light as it passes through liquids with different refractive indices
to determine the turbidity of liquids by measuring suspended particles
to analyze the reflectance of light on solid surfaces
What is the function of an analyzer calibration process?
to replace a normal process sample with known compounds so the analyzer can read the correct values
to clean the analyzer components and prevent potential measurement errors
to manually adjust the analyzer to operate at different temperature ranges
to ensure the sample transportation lag is minimized
How does a near-infrared (NIR) moisture analyzer work?
it measures the reflectance of the process material and calculates moisture content
it uses nuclear radiation to detect moisture levels in solids
it determines moisture content based on the electrical impedance of the sample
it relies on gravimetric moisture analysis, which measures weight loss during drying
Which of the following instruments are types of liquid analyzers?
liquid density analyzer and viscosity analyzer
refractive index analyzer and turbidity analyzer
continuous hydrometer, displacement hydrometer, and nuclear radiation density analyzer
all of the above
What is the difference between absolute humidity and relative humidity?
absolute humidity is the ratio of the mass of water vapor to the mass of dry air, while relative humidity is the ratio of the actual water vapor content to the maximum possible at a given temperature
absolute humidity measures only the temperature of the air, while relative humidity considers the presence of liquid water
absolute humidity is used only for solid-state moisture analysis, whereas relative humidity applies to gases
absolute humidity measures only high humidity conditions, while relative humidity measures both high and low humidity
__ is the process of measuring the physical, chemical, or electrical properties of chemical compounds so that the composition and quantities of the components can be determined.
Testing different chemical reactions
Identifying molecular structures
Conducting experiments in a laboratory
Analysis, which involves measuring the physical, chemical, or electrical properties of chemical compounds to determine their composition and the quantities of their components.
What is an analyzer used for?
Heating chemical substances
Storing different types of samples
Mixing gases, liquids, and solids
Providing an analysis of a sample from a process, which may be in the form of a gas, liquid, or solid.
Which of the following describes the function of an on-line analyzer?
It is used to store historical data from past processes.
It provides manual readings of temperature and pressure within a process system.
It analyzes the composition of gases in a laboratory setting.
It collects continuous samples from the process area and provides immediate results to help operators respond quickly to process changes.
What is the main purpose of an analyzer sampling system?
To filter out impurities from the process stream before analysis.
To deliver a representative, conditioned sample to the analyzer reliably.
To store samples for long-term archival.
To increase the analyzer’s measuring range by amplification.
Why is it important for a sample to be representative in the process?
Because it ensures that the sample is large enough for analysis.
Because it helps to store the sample properly for future analysis.
Because the composition of the sample must match the composition in the process piping for accurate analyzer results.
Because it allows for faster analysis in the laboratory.
What is the primary purpose of an analyzer?
To change the chemical composition of a sample
To measure the properties of chemical compounds
To mix chemicals in a process
To heat up a process stream
What type of samples can analyzers analyze?
Gas only
Liquid only
Solid only
Gas, liquid, or solid
What is an on-line analyzer?
An analyzer used only in laboratories
An instrument that analyzes samples continuously or frequently
A device that stores samples for later analysis
An analyzer that only provides historical data
What is an analyzer sampling system used for?
To extract, condition, and transport a sample to the analyzer
To store samples for later use
To remove impurities from a sample
To heat up the sample before analysis
Why must a sample be representative of the process?
To ensure accuracy of the analyzer readings
To make analysis faster
To reduce contamination
To decrease the cost of sampling
What is sample transport delay?
The time required for the sample to reach the analyzer
A delay due to improper sampling
A delay in receiving samples from suppliers
The time taken to prepare a sample
What is analyzer calibration?
Cleaning the analyzer before use
Adjusting the analyzer using known reference samples
Replacing analyzer components
Reprogramming the analyzer software
Which factor does NOT affect the accuracy of an analyzer?
Calibration
Ambient temperature
Size of the analyzer
Sample transport delay
How often should an analyzer be calibrated?
Once in its lifetime
Only when incorrect results are detected
Regularly, according to manufacturer recommendations
Before every new analysis
What happens if an analyzer is not properly calibrated?
It will produce inaccurate measurements
It will stop working
It will speed up sample analysis
It will permanently fail
What does a gas analyzer measure?
The total mass of a gas sample
The concentration of a specific gas in a sample
The pressure of a gas
The temperature of a gas
How does a thermal conductivity analyzer work?
It measures changes in thermal conductivity compared to a reference gas
It measures pressure changes
It analyzes gas color
It determines the speed of sound in a gas
What is the function of an absorption-based gas analyzer?
It absorbs gas molecules for analysis
It uses light absorption to identify gas components
It measures the electrical resistance of gases
It determines gas pressure changes
What does a Non-Dispersive Infrared (NDIR) analyzer measure?
UV light absorption in gases
Gas concentrations using infrared absorption
Water content in a gas sample
Gas sample temperature
Which type of gas analyzer uses UV radiation for measurement?
Thermal conductivity analyzer
Electrochemical oxygen analyzer
Ultraviolet (UV) gas analyzer
Zirconia oxygen analyzer
What is a paramagnetic oxygen analyzer?
An analyzer that measures oxygen using thermal conductivity
An analyzer that detects oxygen based on its magnetic properties
An analyzer that absorbs oxygen molecules
An analyzer that uses UV radiation
How does a thermoparamagnetic oxygen analyzer work?
It creates a "magnetic wind" to move gas molecules
It detects changes in thermal conductivity
It measures changes in electrical resistance
It uses UV radiation
What is a zirconia oxygen analyzer?
A device that measures oxygen concentration using an electric current
A device that absorbs oxygen and changes color
An analyzer that only works under high pressure
A device that uses lasers to measure oxygen concentration
Which oxygen analyzer type is based on electrochemical reactions?
Thermal conductivity analyzer
Non-Dispersive Infrared (NDIR) analyzer
Electrochemical oxygen analyzer
Paramagnetic oxygen analyzer
Which oxygen analyzer is most commonly used in industrial applications?
NDIR analyzer
Zirconia oxygen analyzer
UV gas analyzer
Thermal conductivity analyzer
What does a moisture analyzer measure?
The amount of water vapor in a gas sample
The concentration of oxygen in the sample
The presence of hydrocarbons
The temperature of the sample
Which principle is used in a dew point analyzer?
Measuring the temperature at which moisture condenses
Measuring the pressure of the gas sample
Measuring the infrared absorption of gases
Detecting changes in magnetic properties
What does a combustion analyzer measure?
The total mass of a sample
The efficiency and emissions of combustion processes
The speed of combustion
The electrical conductivity of gases
What type of sensor is used in a flame ionization detector (FID)?
A sensor that detects hydrocarbons by measuring ionized particles in a flame
A sensor that measures light absorption
A sensor that uses UV radiation
A thermal conductivity sensor
What is the primary use of a gas chromatograph?
Separating and analyzing components in a gas mixture
Measuring gas temperature
Detecting combustion efficiency
Measuring thermal conductivity
What does a humidity analyzer measure?
Temperature
Air pressure
Amount of water vapor in air
Oxygen levels
What is absolute humidity?
Ratio of the mass of water vapor to the mass of dry air
Ratio of actual water vapor to the maximum possible water vapor
Temperature at which condensation occurs
The temperature difference between wet and dry bulb thermometers
What is relative humidity?
Ratio of water vapor to total air volume
Ratio of actual water vapor to the maximum amount possible at the same temperature
The mass of dry air plus moisture
The weight of water in one cubic meter of air
