NCCER INSTRUMENTATION EXAM QUESTIONS WITH CORRECT VERIFIED SOLUTIONS 100% GUARANTEED PASS (LATEST UPDATE)

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NCCER INSTRUMENTATION EXAM QUESTIONS UU U U U




WITH CORRECT VERIFIED SOLUTIONS 100% GU
U U U U U




ARANTEED PASS (LATEST UPDATE) U U U




Regardless of the level of power being controlled by a relay, the activation of
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the relay is accomplished by a ---- power level signal - ANS ✓lower
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Relays that are a combination of electromechanical and solid state technolo
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gy are known as ------ - ANS ✓hybrid relays
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Reed relays are used in applications requiring all of the following characteri
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stics except? - ANS ✓high current
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Relays that are often referred to as throwaway relays are _____ relays -
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ANS ✓general purpose plug in
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The primary difference between a reed switch and a reed relay is _____ -
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ANS ✓reed relays contain their own coil and reed switches depend on an external
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magnetic field to operate u u u




Latching types of general purpose relays typically have ______ coils -
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ANS ✓two
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Electrometrical control relays are used in all of the following functions exce u u u u u u u u u u u



pt _____ - ANS ✓high speed power switching
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A disadvantage associated with solid state relays is______ -
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ANS ✓current leakage
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In a solid state relay, an LED converts electrical energy into _______ -
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uANS ✓light energy u u




The force balance principle is most commonly used in pneumatic ______ -
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ANS ✓transmitters
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Using pneumatic input signals as operands, computing relays perform ______ f
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unctions - ANS ✓mathematical u u u




Pneumatic selector and limiter relays work on the principle of satisfying a p
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re-set ______ - ANS ✓pressure setting
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One disadvantage of an oil pot timing relay is that the timing may be eratic if
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_______ - u



uANS ✓the piston is not allowed to make a full return to the bottom of the dash pot
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Clock mototrs on time switches are typically _______ -
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ANS ✓AC synchronous motors
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Switching functions in a solid state timer are provided by _______ - ANS ✓scrs
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Another name for a sensor is a ----- - ANS ✓detector
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The device principle of an RTD is that resistance varies linearly with ------- -
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ANS ✓temperature
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A device that converts one form of input signal to another form of output sig
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nal is caled a ------ - ANS ✓transducer
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Sending a signal from one location to another, usually involving some distan
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ce, is the job of a ---- - ANS ✓transmitter
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The measurement of repeatability of an instrument is referred to as----- -
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ANS ✓precision
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The first system element that responds quantitively to the measured variabl
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e and preforms the initial measurement operation is a ------ - ANS ✓detector
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An orifice plate is normally mounted ----- - ANS ✓between two flanges
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A ---- u



provides maximum accuracy when detecting flow in fluids that contain larg
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er amounnts of suspended solids such as slurries - ANS ✓venturi tube
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In a magnetic flowmeter, the process fluid ----- -
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uANS ✓acts as the moving conductors
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A bourdon tube must be fabricated from amaterial that has elastic propertie
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s so that it ----- - ANS ✓can deform under pressure
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The deflection characteristics of a metal diaphragm pressure device can be s
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omewhat improved by ---- - ANS ✓corrugating the surface
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The us of metallic bellows has been most successful in the -----
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pressure range - ANS ✓0.5 to 75 psig
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When measuring differential pressure with an instrument that is equipped
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with a capacitance pressure sensor, ---- is applied to isolating diaphragm A -
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ANS ✓the pressure to be measured
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