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NCCER REVIEW EXAM Questions and
Answers ALREADY GRADED A+ Latest
Updates 2025 GRADED A+
Differential pressure transmitters measure level by inference from:
Capacitance
Conductivity
Hydrostatic head
Thermal energy - ANSWER: Hydrostatic head
Which of the following types of control has the most offset:
Proportional
Proportional-plus-reset
On-off
Proportional-plus-reset-plus-rate - ANSWER: On-off
Hydrostatic head level can NOT be measured with a:
dP cell
Dip pipe
Resistance probe
Pressure gage - ANSWER: Resistance probe
Which of the following is not necessary when zeroing or calibrating a magnetic
flowmeter?
Calibration factor for the flow tube assembly
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Flow tube full of process material
Proper grounding
Warm-up period for the system - ANSWER: Calibration factor for the flow tube
assembly
Closing high and low pressure tap block valves, venting low side to atmosphere,
and connecting and applying a known calibration pressure to the high side is done
to check:
The condition of the block valves
Tubing for leaks
Zero and span of a dP cell
None of the above - ANSWER: Zero and span of a dP cell
Noise can affect instrument performance directly when it:
Is created by a ground loop
Causes heating of the thermocouple cold junction
Is inducted on to lead wires of an instrument
Results from exposure to electromagnetic fields - ANSWER: Is created by a
ground loop
Which primary element does not produce a differential pressure to measure flow:
Thermistor
Orifice plate
Venturi tube
Dall flow tube - ANSWER: Thermistor
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What occurs if the temperature of the thermocouple measuring junction is lower
than the reference junction?
There is no emf output
The output voltage polarity is reversed
The polarity stays the same but voltage increases
The emf remains the same when temperature changes - ANSWER: The output
voltage polarity is reversed
Which of the following temperature sensors produces an output resistance directly
related to the temperature of the device?
Thermocouple
RTD
Thermistor
Both B and C - ANSWER: RTD
Name a direct method of measuring level
Sight glass
Dip stick
Float and cable
All of the above - ANSWER: All of the above
If the range of a 3-15 psi pneumatic transmitter is 50-350 degrees F, what is the
output signal value at 198 degrees F?
5.7 psi
7.2 psi
8.9 psi
12.6 psi - ANSWER: 8.9 psi
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Limit switch cams are usually found in:
Solenoid actuators
Diaphragm actuator
Piston actuators
Electric motor actuators - ANSWER: Electric motor actuators
Which of the following is NOT a characteristic of positioners?
Slow down response
Minimize friction effects
Permit split-range valve operation
Allow for biasing the valve - ANSWER: Allow for biasing the valve
Which of the following types of actuators responds to a pneumatic signal?
Diaphragm
Motor
Solenoid
Electromagnetic valve - ANSWER: Diaphragm
In which action does increasing signal pressure cause the actuator stem to move
upward, closing a valve?
Direct action, air-to-close
Direction action, air-to-open
Reverse action, air-to-close
Reverse action, air-to-open - ANSWER: Direct action, air-to-close
NCCER REVIEW EXAM Questions and
Answers ALREADY GRADED A+ Latest
Updates 2025 GRADED A+
Differential pressure transmitters measure level by inference from:
Capacitance
Conductivity
Hydrostatic head
Thermal energy - ANSWER: Hydrostatic head
Which of the following types of control has the most offset:
Proportional
Proportional-plus-reset
On-off
Proportional-plus-reset-plus-rate - ANSWER: On-off
Hydrostatic head level can NOT be measured with a:
dP cell
Dip pipe
Resistance probe
Pressure gage - ANSWER: Resistance probe
Which of the following is not necessary when zeroing or calibrating a magnetic
flowmeter?
Calibration factor for the flow tube assembly
,2|Page
Flow tube full of process material
Proper grounding
Warm-up period for the system - ANSWER: Calibration factor for the flow tube
assembly
Closing high and low pressure tap block valves, venting low side to atmosphere,
and connecting and applying a known calibration pressure to the high side is done
to check:
The condition of the block valves
Tubing for leaks
Zero and span of a dP cell
None of the above - ANSWER: Zero and span of a dP cell
Noise can affect instrument performance directly when it:
Is created by a ground loop
Causes heating of the thermocouple cold junction
Is inducted on to lead wires of an instrument
Results from exposure to electromagnetic fields - ANSWER: Is created by a
ground loop
Which primary element does not produce a differential pressure to measure flow:
Thermistor
Orifice plate
Venturi tube
Dall flow tube - ANSWER: Thermistor
,3|Page
What occurs if the temperature of the thermocouple measuring junction is lower
than the reference junction?
There is no emf output
The output voltage polarity is reversed
The polarity stays the same but voltage increases
The emf remains the same when temperature changes - ANSWER: The output
voltage polarity is reversed
Which of the following temperature sensors produces an output resistance directly
related to the temperature of the device?
Thermocouple
RTD
Thermistor
Both B and C - ANSWER: RTD
Name a direct method of measuring level
Sight glass
Dip stick
Float and cable
All of the above - ANSWER: All of the above
If the range of a 3-15 psi pneumatic transmitter is 50-350 degrees F, what is the
output signal value at 198 degrees F?
5.7 psi
7.2 psi
8.9 psi
12.6 psi - ANSWER: 8.9 psi
, 4|Page
Limit switch cams are usually found in:
Solenoid actuators
Diaphragm actuator
Piston actuators
Electric motor actuators - ANSWER: Electric motor actuators
Which of the following is NOT a characteristic of positioners?
Slow down response
Minimize friction effects
Permit split-range valve operation
Allow for biasing the valve - ANSWER: Allow for biasing the valve
Which of the following types of actuators responds to a pneumatic signal?
Diaphragm
Motor
Solenoid
Electromagnetic valve - ANSWER: Diaphragm
In which action does increasing signal pressure cause the actuator stem to move
upward, closing a valve?
Direct action, air-to-close
Direction action, air-to-open
Reverse action, air-to-close
Reverse action, air-to-open - ANSWER: Direct action, air-to-close
