Instrument Technician NCCER Exam Prep
Latest 2025 Questions and Correct Verified
Answers/ NCCER Instrument Tech 2025-2026
Exam Prep – 230 Latest Questions and Answers
1) A compressor keeps blowing a PSV for troubleshooting a technician should start
looking at
A. Power switch setting
B. Pressure switch deadband
C. Level switch setting
D. Float switch deadband - ANSWER-B. Pressure switch deadband
2) What is a common material used to minimize moisture in the instrumentation ?
A. Desiccant
B. Silica clay
C. Cotton
D. Wood shavings - ANSWER-A. Desiccant
3) An instrument fitter needs to withdraw 2 sticks of " Hastelloy " B " tubing from
stores . It is not labeled and is mixed in with 12 " 316 SS tubing that is also not
labeled . What should be done ?
A. Have procurement order some more from the supplier
B. Report the problem to the supervisor and have the tubing PMI'd
C. Compare wall thicknesses and use the one with the most wall thickness
D. Perform a hardness test on the tubing - ANSWER-B. Report the problem to the
supervisor and have the tubing PMI'd
pg. 1
,4) When simulating a turbine sensing element during calibration of a flowmeter the
instrument technician might use
A. A pulse source and milliamp meter
B. An oscilloscope and a voltmeter
C. A venturi tube and ohmmeter
D. An annubar and voltmeter - ANSWER-B. An oscilloscope and a voltmeter
5) An analog instrument has been determined to have excessive noise on the signal
in troubleshooting the problem what would a technician look for
A. The instrument is located in an extremely hot area
B. The instrument is getting moisture inside the housing
C. The insulation is damaged on the signal wires
D. The installation meets the NEC code regulations - ANSWER-C. The insulation
is damaged on the signal wires
6) A pressure piping code is found in :
A. ANSI B 31.1
B. NEC 690 .
C. OSHA1910 .
D. ISA S 5.1 - ANSWER-A. ANSI B 31.1
7) When marking tubing for cutting , the preferred method is
A. Scribe a mark into the tube with a sharp object .
B. Mark the tube with a grease pencil
C. Mark the tube with a felt tip pen
pg. 2
,D. Mark the tube with a crayon - ANSWER-C. Mark the tube with a felt tip pen
8) An example of direct measurement indicator is a :
A. Pressure gauge
B. Bulb thermometer
C. Sight glass
D. Flowmeter - ANSWER-C. Sight glass
9) On the image , how many hand valves are installed on Tank 1201C
A. 1
B. 2
C. 3
D. 4 - ANSWER-C. 3
10) What is the first step in troubleshooting a problem in a system ?
A. Turn off power to the instrument
B. Stimulate an input
C. Verify that there is a problem
D. Stimulate an output - ANSWER-C. Verify that there is a problem
11) Where can the appropriate elevation of an instrument be found ?
A. Location drawing
B. P & ID
C. Flow diagram
D. Loop drawing - ANSWER-A. Location drawing
pg. 3
, 12) Chemical cleaning of tubing attached to instruments may cause damage to
sensor
A. Electronics
B. Paint
C. Elements
D. Bolts - ANSWER-C. Elements
13) When making 90 - degree tubing bend , allowance for springback should be :
A. 6 to 8 degrees
B. 4-5 degrees
C. 1 to 3 degrees
D. 0 degrees - ANSWER-C. 1 to 3 degrees
14) Cable shields should be connected to the :
A. Signal ground reference point
B. Ground at each accessible location
C. First accessible grounding electrode
D. Raceway or cable tray in which the cable is routed - ANSWER-B. Ground at
each accessible location
15) An employee de energizes a piece of equipment by removing the power plug
from the outlet . If the employee continues to hold on to the power plug once
removed , this employee is said to have what type of control over the energy
potential ?
A. Isolation control
B. Lockout tagout
pg. 4
Latest 2025 Questions and Correct Verified
Answers/ NCCER Instrument Tech 2025-2026
Exam Prep – 230 Latest Questions and Answers
1) A compressor keeps blowing a PSV for troubleshooting a technician should start
looking at
A. Power switch setting
B. Pressure switch deadband
C. Level switch setting
D. Float switch deadband - ANSWER-B. Pressure switch deadband
2) What is a common material used to minimize moisture in the instrumentation ?
A. Desiccant
B. Silica clay
C. Cotton
D. Wood shavings - ANSWER-A. Desiccant
3) An instrument fitter needs to withdraw 2 sticks of " Hastelloy " B " tubing from
stores . It is not labeled and is mixed in with 12 " 316 SS tubing that is also not
labeled . What should be done ?
A. Have procurement order some more from the supplier
B. Report the problem to the supervisor and have the tubing PMI'd
C. Compare wall thicknesses and use the one with the most wall thickness
D. Perform a hardness test on the tubing - ANSWER-B. Report the problem to the
supervisor and have the tubing PMI'd
pg. 1
,4) When simulating a turbine sensing element during calibration of a flowmeter the
instrument technician might use
A. A pulse source and milliamp meter
B. An oscilloscope and a voltmeter
C. A venturi tube and ohmmeter
D. An annubar and voltmeter - ANSWER-B. An oscilloscope and a voltmeter
5) An analog instrument has been determined to have excessive noise on the signal
in troubleshooting the problem what would a technician look for
A. The instrument is located in an extremely hot area
B. The instrument is getting moisture inside the housing
C. The insulation is damaged on the signal wires
D. The installation meets the NEC code regulations - ANSWER-C. The insulation
is damaged on the signal wires
6) A pressure piping code is found in :
A. ANSI B 31.1
B. NEC 690 .
C. OSHA1910 .
D. ISA S 5.1 - ANSWER-A. ANSI B 31.1
7) When marking tubing for cutting , the preferred method is
A. Scribe a mark into the tube with a sharp object .
B. Mark the tube with a grease pencil
C. Mark the tube with a felt tip pen
pg. 2
,D. Mark the tube with a crayon - ANSWER-C. Mark the tube with a felt tip pen
8) An example of direct measurement indicator is a :
A. Pressure gauge
B. Bulb thermometer
C. Sight glass
D. Flowmeter - ANSWER-C. Sight glass
9) On the image , how many hand valves are installed on Tank 1201C
A. 1
B. 2
C. 3
D. 4 - ANSWER-C. 3
10) What is the first step in troubleshooting a problem in a system ?
A. Turn off power to the instrument
B. Stimulate an input
C. Verify that there is a problem
D. Stimulate an output - ANSWER-C. Verify that there is a problem
11) Where can the appropriate elevation of an instrument be found ?
A. Location drawing
B. P & ID
C. Flow diagram
D. Loop drawing - ANSWER-A. Location drawing
pg. 3
, 12) Chemical cleaning of tubing attached to instruments may cause damage to
sensor
A. Electronics
B. Paint
C. Elements
D. Bolts - ANSWER-C. Elements
13) When making 90 - degree tubing bend , allowance for springback should be :
A. 6 to 8 degrees
B. 4-5 degrees
C. 1 to 3 degrees
D. 0 degrees - ANSWER-C. 1 to 3 degrees
14) Cable shields should be connected to the :
A. Signal ground reference point
B. Ground at each accessible location
C. First accessible grounding electrode
D. Raceway or cable tray in which the cable is routed - ANSWER-B. Ground at
each accessible location
15) An employee de energizes a piece of equipment by removing the power plug
from the outlet . If the employee continues to hold on to the power plug once
removed , this employee is said to have what type of control over the energy
potential ?
A. Isolation control
B. Lockout tagout
pg. 4
