NCCER Instrumentation EXAM COMPLETE 400 Questions and Detailed Answers Latest Update This Year

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NCCER Instrumentation EXAM COMPLETE
400 Questions and Detailed Answers Latest
Update This Year

QUESTION: of the following, -------transducers may convert a 0-5 volt to a 4-20 mA signal -

ANSWER-e/i




QUESTION: the function a feedback transmission circuit in a contoller is to ----- - ANSWER-

convert the sensor signal into a useable controller signal




QUESTION: a variable orifice that is used to regulate the flow of process fluid according to the

requirement of the process is known as a ------- - ANSWER-control valve




QUESTION: the componet attached to a control valve that compares the stem motion of the

valve to the signal of the controller is the ------- - ANSWER-actuator




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QUESTION: the selection and interconnection of devices in an instrumenatiion channel that

ultimately determine the stability of the process are reffered to as the ----- - ANSWER-control

loop




QUESTION: another name for an open loop is a ----- loop - ANSWER-feed forward




QUESTION: another name for a feedback loop is a---- loop - ANSWER-closed




QUESTION: the primary performance for a any closed loop system is ------- - ANSWER-stability




QUESTION: another name for a two postion control mode is ------ control - ANSWER-on-off




QUESTION: in what type of control mode is the final control element throttled to various

positions that are dependent on process systems conditions? - ANSWER-proportional




QUESTION: in what type of control mode is the output rate of change dependent on the

magnitude of the input? - ANSWER-integral



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QUESTION: the basic function of a process control system is to ---- - ANSWER-maintain a

balanced energy or material input to output ratio relationship




QUESTION: you would most liekly find an RTD ina ---- process control loop - ANSWER-

Temperature




QUESTION: the function of an FY is ----- - ANSWER-to convert a differential pressure signal to a

linear flow signal




QUESTION: an advantage of using an electrostatic precipitator is its ---- - ANSWER-low electrical

cost


the concept of measuring, comparing, computing, and correcting is implemented by the -------- -

ANSWER-Control System




QUESTION: the operation or operations used in the treatment of materials compromise the -----

- - ANSWER-process




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QUESTION: the process parameters are subject to if the energy balance is ------ - ANSWER-upset




QUESTION: the process parameters that is selected for control is the ---- variable - ANSWER-

control




QUESTION: the control variable is ultimately controlled by the ---- loop - ANSWER-controller




QUESTION: which parameter supplies energy or material to the process to regulate the

deviation of a process output? - ANSWER-manipulated variable




QUESTION: whcih of the following measuring detectors applies a coverging cone shaped inlet

section? - ANSWER-venturi tube




QUESTION: a detector or sensor is considered good if it is designed to minimize ------ - ANSWER-

disturbance




QUESTION: if a tanks level is measured by a dipstick, this is considered------- - ANSWER-direct



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