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Instrumentation NCCER Questions and
Correct Answers/ Latest Update /
Already Graded
When inspecting a regulator control nitrogen pad system on a large
storage tank and no pressure is found what critical item besides a
regulator should be checked?
Ans: The PSV
What type of service should Teflon paste never be used on?
Ans: Oxygen System
What is the principle behind how a solenoid valve opens?
Ans: Inductance
Which of the following gases should be used to purge tubing and
pipe after cleaning?
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Ans: Nitrogen
What is the final step in commissioning?
Ans: Documentation
In reference to PID controller, reset relates to which variable?
Ans: Integral
An employee deenergizes a piece of equipment by removing the
power plug from the outlet, if the employees continue to hold the
power plug once removed. The employee is said to have what type
of control over the energy potential?
Ans: Exclusive
The output of a thermocouple is expressed in what units?
Ans: mV
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A different pressure transmitter mounted on a non-vented tank is
used to measure the of the vessel
Ans: Level
When properly calibrated and installed the most accurate primary
flow element is the ?
Ans: Coriolis
What is the primary disadvantage of a direct operated regulator?
Ans: Poor Adjustment
What is the primary advantage of a pilot operated regulator?
Ans: More precise
A valve has linear characteristic when?
Ans: When flow rate provided is proportional to the amount od valve lift
Instrumentation NCCER Questions and
Correct Answers/ Latest Update /
Already Graded
When inspecting a regulator control nitrogen pad system on a large
storage tank and no pressure is found what critical item besides a
regulator should be checked?
Ans: The PSV
What type of service should Teflon paste never be used on?
Ans: Oxygen System
What is the principle behind how a solenoid valve opens?
Ans: Inductance
Which of the following gases should be used to purge tubing and
pipe after cleaning?
,2 | Page
Ans: Nitrogen
What is the final step in commissioning?
Ans: Documentation
In reference to PID controller, reset relates to which variable?
Ans: Integral
An employee deenergizes a piece of equipment by removing the
power plug from the outlet, if the employees continue to hold the
power plug once removed. The employee is said to have what type
of control over the energy potential?
Ans: Exclusive
The output of a thermocouple is expressed in what units?
Ans: mV
, 3 | Page
A different pressure transmitter mounted on a non-vented tank is
used to measure the of the vessel
Ans: Level
When properly calibrated and installed the most accurate primary
flow element is the ?
Ans: Coriolis
What is the primary disadvantage of a direct operated regulator?
Ans: Poor Adjustment
What is the primary advantage of a pilot operated regulator?
Ans: More precise
A valve has linear characteristic when?
Ans: When flow rate provided is proportional to the amount od valve lift
