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NCCER REVIEW EXAM questions and
answers 2025\2026 update
A technology bypassing conventional I/O by using direct communications between
smart field devices and associated control processors is:
SCADA
WAN
Peer-to-peer
Fieldbus - ANSWER: Fieldbus
In a test of the accuracy of a pneumatic comparator with a pressure gauge, pressure
readings of the test gauge and the gauge being tested are compared at a number of
test points. Test points readings are made:
Only as the pressure is slowly increased
Only as the pressure is slowly decreased
In no particular sequence
As the pressure is both increased and decreased - ANSWER: As the pressure is
both increased and decreased
Mass flow measurement requires accurate values is:
Volumetric flow
Temperature
Pressure
All of the above - ANSWER: All of the above
When a sensor is inserted in a thermowell, which of the following could safely
improve response to temperature changes?
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Mercury
Antifreeze
Copper strips
Magnesium oxide particles - ANSWER: Antifreeze
What type of transducer converts the variable being measured into a voltage
generated by a crystal when it is mechanically stressed?
Reluctive
Piezoelectric (used in DP cells)
Inductive
Capacitive - ANSWER: Piezoelectric (used in DP cells)
A gage pressure of 195 psi is roughly what in psia?
151
164
178
210 - ANSWER: 195 + 14.7=210 at sea level
Which comment below does NOT describe a force-balance transmitter?
Is self-balancing
Output signal is proportional to process variable signal
Operates with a thrust rod
Has a force beam that pivots on a fulcrum - ANSWER: Operates with a thrust rod
Changing the proportional band of a pneumatic controller changes:
The alignment of the controller
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The position of the nozzle with respect to the baffle
The gain
The set point - ANSWER: The gain
If a proportional band is set so that 50% of the input gives a full range of output,
the proportional gain is:
0.5
4.0
1.0
2.0 - ANSWER: 2.0
A power supply component that reduces the ripple in the waveform is a :
Transformer
Rectifier
Filter
Regulator - ANSWER: Filter
If water freezes at 32°F, what will it freeze at in degrees C?
-3.2
-14.7
0.0
25.6 - ANSWER: 0.0
Which of the following provides a warning when low and/or high limits of
optimum range are being approached?
Calibrating trim pots
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Absolute alarm points
Variable set points
Range adjusters - ANSWER: Absolute alarm points
A device that converts alternating current to direct current is called a:
Rectifier
Ratio station
Differential amplifier
Comparator - ANSWER: Rectifier
The oil within the variable capacitor of a capacitance-type differential pressure
transmitter is separated from the process by:
A sensing diaphragm
Capacitor plates
Isolating diaphragms
Bellows - ANSWER: A sensing diaphragm
When a dip pipe (bubbler) system is used for tank level measurement, the dip pipe
is connected to:
The purge gas flow controller
The low side of the dP cell
The high side of the dP cell
The dP cell output signal line - ANSWER: The purge gas flow controller
A logic gate most similar to a parallel circuit is the:
AND gate
NCCER REVIEW EXAM questions and
answers 2025\2026 update
A technology bypassing conventional I/O by using direct communications between
smart field devices and associated control processors is:
SCADA
WAN
Peer-to-peer
Fieldbus - ANSWER: Fieldbus
In a test of the accuracy of a pneumatic comparator with a pressure gauge, pressure
readings of the test gauge and the gauge being tested are compared at a number of
test points. Test points readings are made:
Only as the pressure is slowly increased
Only as the pressure is slowly decreased
In no particular sequence
As the pressure is both increased and decreased - ANSWER: As the pressure is
both increased and decreased
Mass flow measurement requires accurate values is:
Volumetric flow
Temperature
Pressure
All of the above - ANSWER: All of the above
When a sensor is inserted in a thermowell, which of the following could safely
improve response to temperature changes?
,2|Page
Mercury
Antifreeze
Copper strips
Magnesium oxide particles - ANSWER: Antifreeze
What type of transducer converts the variable being measured into a voltage
generated by a crystal when it is mechanically stressed?
Reluctive
Piezoelectric (used in DP cells)
Inductive
Capacitive - ANSWER: Piezoelectric (used in DP cells)
A gage pressure of 195 psi is roughly what in psia?
151
164
178
210 - ANSWER: 195 + 14.7=210 at sea level
Which comment below does NOT describe a force-balance transmitter?
Is self-balancing
Output signal is proportional to process variable signal
Operates with a thrust rod
Has a force beam that pivots on a fulcrum - ANSWER: Operates with a thrust rod
Changing the proportional band of a pneumatic controller changes:
The alignment of the controller
,3|Page
The position of the nozzle with respect to the baffle
The gain
The set point - ANSWER: The gain
If a proportional band is set so that 50% of the input gives a full range of output,
the proportional gain is:
0.5
4.0
1.0
2.0 - ANSWER: 2.0
A power supply component that reduces the ripple in the waveform is a :
Transformer
Rectifier
Filter
Regulator - ANSWER: Filter
If water freezes at 32°F, what will it freeze at in degrees C?
-3.2
-14.7
0.0
25.6 - ANSWER: 0.0
Which of the following provides a warning when low and/or high limits of
optimum range are being approached?
Calibrating trim pots
, 4|Page
Absolute alarm points
Variable set points
Range adjusters - ANSWER: Absolute alarm points
A device that converts alternating current to direct current is called a:
Rectifier
Ratio station
Differential amplifier
Comparator - ANSWER: Rectifier
The oil within the variable capacitor of a capacitance-type differential pressure
transmitter is separated from the process by:
A sensing diaphragm
Capacitor plates
Isolating diaphragms
Bellows - ANSWER: A sensing diaphragm
When a dip pipe (bubbler) system is used for tank level measurement, the dip pipe
is connected to:
The purge gas flow controller
The low side of the dP cell
The high side of the dP cell
The dP cell output signal line - ANSWER: The purge gas flow controller
A logic gate most similar to a parallel circuit is the:
AND gate
