NCCER Instrumentation Certification Practice Test

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