NCCER Instrumentation Certification Practice Test – All Questions

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Choosing the Right Oil for Delicate Cutting OperationsWhich type of oil is considered non-staining and often used for delicate cutting operations?Discover the Device that Converts Light into Electrical PowerWhat device converts light into electrical power?Discover What a Check Valve Does and Why It MattersWhat is the primary function of a check valve?Exploring the Difference Between Reed Switches and Reed RelaysThe primary difference between a reed switch and a reed relay is _____.Exploring the Essential Role of Liters in Liquid MeasurementWhat is the most common wet measuring unit in the metric system?Gain: The Key Function of a Controller ExplainedWhat is the proportional function of a controller also known as?How to Efficiently Reload Your Operator Workstation After a Hard Drive FailureIn the event of a hard drive failure on an operator workstation, how can it be reloaded?Read the instructions and warning statements before using an aerosol product for safer handlingWhat should be the first action taken before using an aerosol product?The Essentials of Understanding Air to Open Valves in InstrumentationAn air to open valve is equivalent to which type of valve?Understand Fail Open Valves and Their Importance in InstrumentationWhat is a valve that automatically opens whenever the controlling medium is lost called?Understanding Analog Interfaces in Instrumentation SystemsI/O modules that convert varying voltage or current to a digital value are known as what type of interface?Understanding Control Signals in Pneumatic SystemsIn a pneumatic system, which of the following is responsible for signaling the valve actuator?Understanding drops and nodes in network controllers and MMIsNetwork controllers and an MMI are often referred to as what?Understanding Effective Methods for Maintaining Edge Filtration SystemsA recommended way to remove foreign particles from an edge filtration filter element is to ______.Understanding Electron Flow in Hardwired Systems: A Crucial Concept for Instrumentation CertificationIn hardwired systems, where do electrons flow from the voltage source?Understanding Energy Balance Upset in Instrumentation SystemsThe process parameters are subject to if the energy balance is ------Understanding Gauge Pressure from Absolute Pressure ReadingsIf an absolute pressure gauge reads 56.5 psia and atmospheric pressure is 14.7 psi, what is the gauge pressure psig reading?Understanding Head Pressure in Fluid MechanicsWhat does the term “head pressure” specifically refer to?Understanding how a file hardness assessment reveals steel propertiesWhat can a file test be used to determine about steel?Understanding How Analog Recorders Operate in InstrumentationWhat type of recorders typically uses analog signals for their operation?Understanding How Relays Use Lower Power Signals for ActivationRegardless of the level of power being controlled by a relay, the activation of the relay is accomplished by a ---- power level signal.Understanding Hydrostatic Pressure and Its Importance in InstrumentationHydrostatic pressure is also referred to as what type of pressure?Understanding Natural Rubber and Its Limitations Against PetroleumNatural rubber has a limited chemical resistance to which of the following products?Understanding Oil Pot Timing Relays and Their DisadvantagesOne disadvantage of an oil pot timing relay is that the timing may be erratic if ______.Understanding Output Air Temperatures in Refrigerant-Type Drying SystemsIn a typical refrigerant-type drying system, the condition of the output air is typically between what temperatures?Understanding Partitioning in I/O DistributionWhat is the term used to define the distribution of I/O to different drops?Understanding PLC Hardware: What You Need to KnowWhich of the following is NOT a major hardware component of a PLC?Understanding Pneumatic Control Systems in Early Industrial ApplicationsWhat type of control systems would be most prevalent in early industrial applications?Understanding Poor Grounding Practices in Signal CircuitsWhich practice is considered poor grounding in signal circuits?Understanding Project Specifications: How Metal Products Are Chosen in ConstructionThe type of metal product to be used on a job is usually designed in which document?Understanding Safe Practices for Using Aerosol ProductsIn what scenario should aerosol products not be used?Understanding Temperature Conversion for Instrumentation ProfessionalsA temperature reading of 125 degrees Celsius is equivalent to how many degrees Fahrenheit?Understanding the Advantages of Electrostatic Precipitators in Industrial ApplicationsWhat is an advantage of using an electrostatic precipitator?Understanding the Complicated Nature of Transitional Flow ProfilesWhat type of flow profile is difficult to predict due to its oscillatory nature?Understanding the Core Functions of a Process Control SystemWhat is the basic function of a process control system?Understanding the Essential Uses of Pipe Dope in Piping SystemsWhat is the recommended use for a pipe dope?Understanding the Force Balance Principle in Pneumatic TransmittersThe force balance principle is most commonly used in pneumatic ______.Understanding the Functions of Electrometrical Control RelaysElectrometrical control relays are used in all of the following functions except _____.Understanding the Importance of Control Loops in InstrumentationThe selection and interconnection of devices in an instrumentation channel that determine the stability of the process is referred to as what?Understanding the Importance of Orthographic DrawingsWhat type of drawing illustrates multiple views of an object to show its dimensions and relationships?Understanding the Importance of Warning Statements on Aerosol ProductsWhy is it important to read warning statements on aerosol products?Understanding the Key Differences Between Electronic Force Balance Transmitters and Pneumatic DP CellsWhat is the major difference between an electronic force balance transmitter and a pneumatic DP cell?Understanding the Key Performance Objective of Closed Loop SystemsThe primary performance objective for any closed loop system is what?Understanding the Key Steps Before Replacing a Faulty ModuleWhat should be prioritized before replacing a faulty module?Understanding the Major Functions of Software Servers in Control SystemsWhat is a major function of the software server in control systems?Understanding the Most Common Communication Protocol in PLCsWhich type of communication protocol is most commonly found in PLCs?Understanding the Role of an Input Module in PLC SystemsWhat is the role of an input module in a PLC?Understanding the Role of Cutting Oils in Reducing Heat and Friction During ThreadingCutting oils are primarily used to reduce which of the following during threading?Understanding the Role of Electronic to Pneumatic ConvertersWhat is the most frequent application of an electronic to pneumatic converter?Understanding the Role of Gauges in Measurement SystemsWhat is the primary function of a gauge in a measurement system?Understanding the Role of I/P Transducers in InstrumentationAn I/P transducer converts what kind of signal?Understanding the Role of Limit Switches in Automation SystemsWhat type of switches are activated mechanically by the motion of machinery?Understanding the Role of Recorders in Instrumentation and ControlWhat are instruments that provide permanent records of changes in a process variable known as?Understanding the Role of Remote I/O in Large SystemsWhat is the primary purpose of remote I/O in large systems?Understanding the Role of the Processor in PLC SystemsWhich component of a PLC is responsible for executing the ladder logic program?Understanding the Role of the Venturi Tube in Flow MeasurementWhich of the following measuring detectors applies a converging cone shaped inlet section?Understanding the Role of Transducers in InstrumentationAnother name for a sensor is a _____.Understanding the Role of Transducers in InstrumentationA device that converts one form of input signal to another form of output signal is called a ------Understanding the Use of Gray Code in Rotational EncodersWhich code do rotational encoders use?Understanding Unit Conversion in InstrumentationWhat does unit conversion involve?Understanding What Happens to DCS Values When a Point Is RemovedWhat happens to the DCS value when a point is removed from the scan?Understanding why Ladder Logic is the go-to PLC programming languageWhich PLC programming language is considered the most widely used?What characterizes a transitional flow regime in instrumentation and process controlWhich of the following describes a characteristic of a transitional flow regime?What Colors Are Used for Type J Thermocouples?What are the colors of the conductors of a type J thermocouple?What Happens to a Fail Open Valve When Control Is Lost?When the controlling medium is lost, what happens to a fail open valve?What You Need to Know About Aluminum Oxide FormationWhen aluminum is exposed to air, what is formed on its surface?What You Need to Know About I/P Transducers and Their Role in AutomationAn I/P transducer is used to convert which type of signals?What You Need to Know About Open Loop Systems in InstrumentationAnother name for an open loop is what?What You Need to Know About Project Specifications for Metal ProductsWhat is typically outlined in project specifications regarding metal products?

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The primary function of a valve positioner is to:
The precise determination of mass flow rates also involves which aspect?
A typical pneumatic positioner is likely to have how many pressure gauges?
In I/O wiring, what should you verify according to the I/O address assignment document?
Switching functions in a solid state timer are provided by ______.
An air to close valve is the same as which of the following valves?
What is another name for direct operated pneumatic regulators?
Which temperature scale is most commonly used in industrial applications?
Pneumatic selector and limiter relays work on the principle of satisfying a preset ______.
Which common measuring element is used in mechanical recorders?
What device often receives signals from sensors in a control system?
What does MMI stand for in the context of network controllers?
What type of information does a Material Safety Data Sheet (MSDS) contain?
How many meters are equivalent to 9.843 feet?
What is another term for on-off control?
A Venturi tube is primarily used for what purpose in instrumentation?
How can one ensure they are aware of the risks associated with aerosol products?
How many inches are there in one meter?
Both active and inactive cutting oils contain what compound?
If a tank's level is measured by a dipstick, this is considered-------
You would most likely find an RTD in a ______ process control loop.
Which valve is designed for precise flow control in a highly viscous application?
The concept of measuring, comparing, computing, and correcting is implemented by the --------
What is the carbon content range typically found in cast iron?
What phenomenon is described by measuring pressure at a point in a fluid?
Clock motors on time switches are typically ______.
In an I/P transducer, the input signal is first applied to which component?
What term describes the ability of a controller to minimize error without overshooting?
What system is commonly used for variable frequency drives?
After identifying a bad module, what is the next step?
Why are compressors typically supplied with moisture separators?
What type of transducer utilizes electrical resistance variation to sense strain?
Which device uses a change in voltage to measure temperature?
A valve positioner compares the stem position of the valve actuator to what?
What purpose do pull boxes serve in cable management?
What is the primary function of a power supply in a PLC?
What is a common characteristic of active cutting oils?
What is solvent-based sealant paste commonly referred to as?
Reed relays are used in applications requiring all of the following characteristics except?
What is a necessary precaution to take when using aerosol sprays outdoors?
What is a major disadvantage of direct operated regulators?
What is another name for a two-position control mode?
What is a special I/O module that sends out a train of pulses to a motor called?
In a block diagram, the lines between the blocks represent what?
What is the purpose of annealing hard copper?
Which type of display is known for showing numerals and letters in a segmented format?
What type of sensor does a motion detector switch typically use?
What digits does the octal numbering system contain?
The carbon content of steel with an SAE code number of 8720 is approximately what percentage?
For what purpose is a two-way valve most commonly used?
If the output from one device is not compatible with the input supplied to another device, what must be applied?
Which of the following positioners may interface with a PAM program?
How is the control in a direct operated regulator characterized?
What is the reset function of a controller also known as?
Switches are typically used to make or break an electrical circuit that is operating under what condition?
What are electronic recorders that can record more than one process variable called?
When a valve plug tapers from wide to narrow from top to bottom, how must the plug travel to close?
A disadvantage associated with solid state relays is____.
What is the main benefit of using a ladder logic program?
What does the warning statement on an aerosol can typically indicate?
What is the function of a feedback transmission circuit in a controller?
If a fail as positioned valve is 50% open and pneumatic pressure is lost, the valve will:
What is the function of a flow transmitter (FY)?
What would happen to a fail open valve if pneumatic pressure is maintained?
A device designed to maintain or regulate a constant pressure or flow in the output of a system is called a ______.
What is a key disadvantage of using a globe valve?
In what type of control mode is the output rate of change dependent on the magnitude of the input?
Which type of control is best suited for highly variable processes?
Which unit is most commonly used to measure liquid volume in the metric system?
In a binary system, which digit accurately represents off?
In combination filter/dryer systems, the system works best if the compressed air is first:
If a gate valve has a flow arrow indicated on it, it is because the gate valve has a -------.
Since what year has the programmable logic control (PLC) been used in the industry?
What instrument uses a float in a tapered tube to indicate flow?
Which of the following is an example of a common graphical control algorithm?
The measurement of repeatability of an instrument is referred to as -----
Which of the following is a safe practice when using aerosols?
The first system element that responds quantitatively to the measured variable and performs the initial measurement operation is a ------
In a system with a capacitance pressure sensor, what is applied to the isolating diaphragm?
In a controller with proportional and reset control, where does the reset control unit send a signal until balance is achieved?
What does the term 'frozen DCS value' imply?
Flint sandpaper is often used for what purpose?
In what type of control mode is the final control element throttled to various positions that are dependent on process systems conditions?
A device that converts a 4-20 mA signal into a pneumatic signal is known as a:
Which of the following valves is classified as a rotary action valve?
One micron is equivalent to approximately ______ inches.
What types of configuration data are typically entered into each PLC processor?
What is the successful pressure range for metallic bellows when used in instrumentation?
Which modules provide a high-speed counter external to the PLC processors?
What type of actuator provides a more responsive operation in valves?
When is a needle valve typically used?
What is an important step after using an aerosol can?
In what context would you find grounding practices important?
A fail closed valve is closed by which of the following mechanisms?
A pneumatic force balance differential pressure transmitter is also referred to as what?
Which of the following is classified as a type of indicator?
Resistance temperature detectors (RTDs) are commonly made from which of the following?
What is the recommended port diameter when selecting pressure regulators?
Latching types of general purpose relays typically have ______ coils.
The deflection characteristics of a metal diaphragm pressure device can be somewhat improved by ----
Which device is commonly used to measure flow?
What is the significance of the usage instructions on an aerosol product?
Where is the feedback bellows of a pneumatic DP cell located?
A multiview projection is also referred to as what type of drawing?
Using pneumatic input signals as operands, computing relays perform ______ functions.
Which of the following is NOT a common feature of I/O modules?
Low-carbon steel usually contains less than what percentage of carbon?
A ---- provides maximum accuracy when detecting flow in fluids that contain larger amounts of suspended solids such as slurries
A pressure gauge mounted at the bottom of an open tank of water indicates 17 psig. What is the level of water in the tank?
What is the term used to describe how hardware input/output connections correlate to PLC program functions?
What code represents alphanumeric characters in binary?
In an electronic controller with a narrow proportional band setting, what effect does a small movement have?
What type of transducer is commonly used in chemical areas or humid spaces with pneumatic measuring instruments?
What function does a bellows serve in instrumentation?
The process parameters that is selected for control is the ---- variable
When are as-built drawings typically created?
Pneumatic or electric power supplies should not be isolated or disconnected from operating positions unless the technician understands the ---- beforehand.
On a direct acting positioner, if the output from the controller decreases, the positioner's output will:
How is a DCS superior to a hardware alarm system?
What is the abbreviation for polytetrafluoroethylene?
Most control statement languages in the industry are similar to which of the following?
Why is the zero point on a pneumatic transmitter typically set to 3 psi instead of 0 psi?
What condition must pneumatic instruments and processes avoid regarding compressed air?
A thermocouple uses ------ measurement
In a PLC, what is stored in the program memory?
Sending a signal from one location to another, usually involving some distance, is the job of a ----
What base is the binary number system?
What serves as the interface between field devices and ladder logic in a PLC?
Which numbering system is represented as base 16?
How is a rotameter primarily utilized in process instrumentation?
What provides a listing of required fittings, connection descriptions, sizes, quantities, and materials in installation drawings?
What is the standard drying reactivation time cycle for a heat reactivated automatic dryer system?
What is a common component in aerosol products that users must be cautious of?
When choosing among valves, which valve exhibits the largest pressure drop?
In a P/I transducer, where is the input signal initially applied?
Which component provides feedback regarding the position of the valve in a control system?
What voltage is a double pole, single throw switch typically used to control?
What is a primary use of ball valves?
Which device is used to measure pressure?
What component is attached to a control valve and compares the stem motion of the valve to the controller signal?
What type of controller has only proportional and integral functions?
What is the primary role of firmware in a PLC?
Which of the following best describes proper storage for aerosol products?
What does the sequence of detailed actions in a PLC program describe?
Which element in steel primarily determines its hardness and strength?
The amount of matter in an object is referred to as what?
The control variable is ultimately controlled by the ---- loop
What is a variable orifice used for in a process?
When converting dimensions of a circle, which measurement needs to be converted?
What were early control systems primarily based on?
What should be avoided while using aerosol products to ensure safety?
Most electronic indicators that utilize a digital display are what type of displays?
What do the poles of a switch define?
For which application should gate valves not be used?
What does the acronym PLC stand for in industrial automation?
Which type of transducer may convert a 0-5 volt signal to a 4-20 mA signal?
Where can information about national electricity codes (NEC) hazardous location classifications for an instrument be found?
When cutting steel from color-coded stock, which end should you cut from?
Relays that are a combination of electromechanical and solid-state technology are known as ------.
What can occur if aerosol instructions are not followed?
For what reason are Bourdon tubes commonly used in pressure measurement devices?
What is the maximum temperature range for effective moisture removal in a refrigerant-type drying system?
In terms of temperature measurement, what does RTD stand for?
A detector or sensor is considered good if it is designed to minimize ------
Which mechanical element is often used with filled thermal systems for measuring?
A controller that includes proportional, reset, and derivative functions is referred to as what type of controller?
Relays that are often referred to as throwaway relays are _____ relays.
In which application is a knife gate valve likely to be used?
What are the three primary functions of a control valve?
Which parameter supplies energy or material to the process to regulate the deviation of a process output?
Which term best describes the process of dividing an I/O system into segments?
What is the primary function of cutting fluids?
How is the resistance force or tensile yield strength of a metal product expressed?
What is a disadvantage of the spring and diaphragm actuator?
In a solid state relay, an LED converts electrical energy into ______.
What is another name for a feedback loop?
When utilizing a deliquescent drying agent, what is the primary function in the drying process?
Which term refers to the adjustment made in a controller to counteract changes in load or set point?
Fittings that are marked LH on the outside wall indicate what type of threads?
In regulator systems, the pressure entering the regulator acts against which force?
The Kelvin scale is sometimes referred to as the what scale?
What would be critical for ensuring reliable operation during a hard drive failure?
What is the primary element in an absorption drying method that liquefies solids?
An orifice plate is normally mounted -----
Why are switch contacts often coated with a material?
What function adjusts the output of the controller based on time-integrated error?
The device principle of an RTD is that resistance varies linearly with -------
What does an SCR (Silicon Controlled Rectifier) primarily do?
In a magnetic flowmeter, the process fluid -----
A bourdon tube must be fabricated from a material that has elastic properties so that it -----
What effect does an increase in light on a photocell have on resistance?
If a calibrated scale measures 70 inches, what is its length in meters?
What type of controller is incorporated in the ABB Automation Series 53MC5000A?
Which of the following should you do if you experience irritation while using an aerosol?
Mass flow rates can be calculated by determining temperature and what else?
Along with moisture separators, compressors are usually equipped with what additional component?
What is an important function of the front panel indicator lights on PLC processors?
What is 110 °C equal to in Fahrenheit?
Which valve type is easily adapted for multiport construction?
Which three functional units are essential in measuring all physical quantities?
In a diaphragm seal detector, the liquid in the space between the diaphragm and the sensor serves to duplicate what?
What type of input does a PID controller primarily manage?
What is formed on the surface of metals when they are oxidized?
Which component develops an error signal in automatic control?
What causes the tube of a C type Bourdon tube to attempt to straighten?
Teflon tape is best used as which of the following due to its characteristics?
A globe valve that closes against the direction of fluid flow is known as what?
What is the base of the decimal numbering system?
Discrete I/O modules are used for which type of interfaces?
On which temperature scale does the boiling point of water equal 100 degrees?
What does the addressing system allow in a PLC program?
What must the test sample used in a tensile strength test meet?
What is the primary purpose of following aerosol product instructions?
Which component is the least likely to fail in a DCS?
What aspect of direct-operated regulators affects their control quality significantly?
The operation or operations used in the treatment of materials compromise the ------

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