1
NCCER
NCCER INSTRUMENTATION EXAM QUESTIONS
WITH CORRECT VERIFIED SOLUTIONS 100%
GUARANTEED PASS (LATEST UPDATE)2025
Regardless of the level of power being controlled by a relay, the activation
of the relay is accomplished by a ---- power level signal - ANS ✓lower
Relays that are a combination of electromechanical and solid state
technology are known as ------ - ANS ✓hybrid relays
Reed relays are used in applications requiring all of the following
characteristics except? - ANS ✓high current
Relays that are often referred to as throwaway relays are _____ relays - ANS
✓general purpose plug in
The primary difference between a reed switch and a reed relay is _____ - ANS
✓reed relays contain their own coil and reed switches depend on an external
magnetic field to operate
Latching types of general purpose relays typically have ______ coils - ANS
✓two
Electrometrical control relays are used in all of the following functions
except _____ - ANS ✓high speed power switching
A disadvantage associated with solid state relays is______ - ANS ✓current
leakage
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, 2
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In a solid state relay, an LED converts electrical energy into _______ - ANS
✓light energy
The force balance principle is most commonly used in pneumatic ______ -
ANS ✓transmitters
Using pneumatic input signals as operands, computing relays perform ______
functions - ANS ✓mathematical
Pneumatic selector and limiter relays work on the principle of satisfying a
pre-set ______ - ANS ✓pressure setting
One disadvantage of an oil pot timing relay is that the timing may be eratic
if _______ - ANS ✓the piston is not allowed to make a full return to the bottom of
the dash pot
Clock mototrs on time switches are typically _______ - ANS ✓AC synchronous
motors
Switching functions in a solid state timer are provided by _______ - ANS ✓scrs
Another name for a sensor is a ----- - ANS ✓detector
The device principle of an RTD is that resistance varies linearly with ------- -
ANS ✓temperature
A device that converts one form of input signal to another form of output
signal is caled a ------ - ANS ✓transducer
NCCER
, 3
NCCER
Sending a signal from one location to another, usually involving some
distance, is the job of a ---- - ANS ✓transmitter
The measurement of repeatability of an instrument is referred to as----- -
ANS ✓precision
The first system element that responds quantitively to the measured
variable and preforms the initial measurement operation is a ------ - ANS
✓detector
An orifice plate is normally mounted ----- - ANS ✓between two flanges
A ---- provides maximum accuracy when detecting flow in fluids that
contain larger amounnts of suspended solids such as slurries - ANS ✓venturi
tube
In a magnetic flowmeter, the process fluid ----- - ANS ✓acts as the moving
conductors
A bourdon tube must be fabricated from amaterial that has elastic
properties so that it ----- - ANS ✓can deform under pressure
The deflection characteristics of a metal diaphragm pressure device can be
somewhat improved by ---- - ANS ✓corrugating the surface
The us of metallic bellows has been most successful in the ----- pressure
range - ANS ✓0.5 to 75 psig
When measuring differential pressure with an instrument that is equipped
with a capacitance pressure sensor, ---- is applied to isolating diaphragm A -
ANS ✓the pressure to be measured
NCCER
NCCER
NCCER INSTRUMENTATION EXAM QUESTIONS
WITH CORRECT VERIFIED SOLUTIONS 100%
GUARANTEED PASS (LATEST UPDATE)2025
Regardless of the level of power being controlled by a relay, the activation
of the relay is accomplished by a ---- power level signal - ANS ✓lower
Relays that are a combination of electromechanical and solid state
technology are known as ------ - ANS ✓hybrid relays
Reed relays are used in applications requiring all of the following
characteristics except? - ANS ✓high current
Relays that are often referred to as throwaway relays are _____ relays - ANS
✓general purpose plug in
The primary difference between a reed switch and a reed relay is _____ - ANS
✓reed relays contain their own coil and reed switches depend on an external
magnetic field to operate
Latching types of general purpose relays typically have ______ coils - ANS
✓two
Electrometrical control relays are used in all of the following functions
except _____ - ANS ✓high speed power switching
A disadvantage associated with solid state relays is______ - ANS ✓current
leakage
NCCER
, 2
NCCER
In a solid state relay, an LED converts electrical energy into _______ - ANS
✓light energy
The force balance principle is most commonly used in pneumatic ______ -
ANS ✓transmitters
Using pneumatic input signals as operands, computing relays perform ______
functions - ANS ✓mathematical
Pneumatic selector and limiter relays work on the principle of satisfying a
pre-set ______ - ANS ✓pressure setting
One disadvantage of an oil pot timing relay is that the timing may be eratic
if _______ - ANS ✓the piston is not allowed to make a full return to the bottom of
the dash pot
Clock mototrs on time switches are typically _______ - ANS ✓AC synchronous
motors
Switching functions in a solid state timer are provided by _______ - ANS ✓scrs
Another name for a sensor is a ----- - ANS ✓detector
The device principle of an RTD is that resistance varies linearly with ------- -
ANS ✓temperature
A device that converts one form of input signal to another form of output
signal is caled a ------ - ANS ✓transducer
NCCER
, 3
NCCER
Sending a signal from one location to another, usually involving some
distance, is the job of a ---- - ANS ✓transmitter
The measurement of repeatability of an instrument is referred to as----- -
ANS ✓precision
The first system element that responds quantitively to the measured
variable and preforms the initial measurement operation is a ------ - ANS
✓detector
An orifice plate is normally mounted ----- - ANS ✓between two flanges
A ---- provides maximum accuracy when detecting flow in fluids that
contain larger amounnts of suspended solids such as slurries - ANS ✓venturi
tube
In a magnetic flowmeter, the process fluid ----- - ANS ✓acts as the moving
conductors
A bourdon tube must be fabricated from amaterial that has elastic
properties so that it ----- - ANS ✓can deform under pressure
The deflection characteristics of a metal diaphragm pressure device can be
somewhat improved by ---- - ANS ✓corrugating the surface
The us of metallic bellows has been most successful in the ----- pressure
range - ANS ✓0.5 to 75 psig
When measuring differential pressure with an instrument that is equipped
with a capacitance pressure sensor, ---- is applied to isolating diaphragm A -
ANS ✓the pressure to be measured
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