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Instrument Technician NCCER Exam Prep Latest
2025 Questions and Correct Verified Answers/
NCCER Instrument Tech Exam Prep – 230 Latest
Questions and Answers
1) When is the BEST time to document each loop check for
commissioning ? A. Prior to the start of inspection
B. When all test and inspection activities are complete
C. When updating information on a daily basis
D. At the time each test is completed - ...ANSWER...✓✓ D.
At the time each test is completed (INST LVL4)(12410-16/
Section 3.2.0)
2) Teflon paste must not be used on :
A. Nitrogen service
B. Natural gas service
C. Water service
D. Oxygen service - ...ANSWER...✓✓ D. Oxygen service
(INST LVL 1 )(12109-14/Section 2.1.1)
3) A 24VDC power supply is not working . With your
multimeter you verify no DC voltage . On the 120VAC input
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you measure 120V between hot and ground , and 72V
between hot and neutral . What is the most likely cause of
this ?
A. Lost the ground
B. Lost the hot
C. Lost the neutral
D. Lost the fuse - ...ANSWER...✓✓ C. Lost the neutral
4) Gain increase when tube :
A. Back bends are made
B. Bend radius increases
C. Size decreases
D. Long radius elbows are used - ...ANSWER...✓✓ B.
Bend radius increases (INST LVL 2)(12302-15 section 2.1.1)
5) A temperature measuring device that produces a
voltage as the temperature changes is a / an :
A. RTD
B. Thermistor
C. Thermometer
D. Thermocouple - ...ANSWER...✓✓ D. Thermocouple
(INST LVL 2) (12110-15 section 1.2.2)
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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
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
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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
Instrument Technician NCCER Exam Prep Latest
2025 Questions and Correct Verified Answers/
NCCER Instrument Tech Exam Prep – 230 Latest
Questions and Answers
1) When is the BEST time to document each loop check for
commissioning ? A. Prior to the start of inspection
B. When all test and inspection activities are complete
C. When updating information on a daily basis
D. At the time each test is completed - ...ANSWER...✓✓ D.
At the time each test is completed (INST LVL4)(12410-16/
Section 3.2.0)
2) Teflon paste must not be used on :
A. Nitrogen service
B. Natural gas service
C. Water service
D. Oxygen service - ...ANSWER...✓✓ D. Oxygen service
(INST LVL 1 )(12109-14/Section 2.1.1)
3) A 24VDC power supply is not working . With your
multimeter you verify no DC voltage . On the 120VAC input
,2|Page
you measure 120V between hot and ground , and 72V
between hot and neutral . What is the most likely cause of
this ?
A. Lost the ground
B. Lost the hot
C. Lost the neutral
D. Lost the fuse - ...ANSWER...✓✓ C. Lost the neutral
4) Gain increase when tube :
A. Back bends are made
B. Bend radius increases
C. Size decreases
D. Long radius elbows are used - ...ANSWER...✓✓ B.
Bend radius increases (INST LVL 2)(12302-15 section 2.1.1)
5) A temperature measuring device that produces a
voltage as the temperature changes is a / an :
A. RTD
B. Thermistor
C. Thermometer
D. Thermocouple - ...ANSWER...✓✓ D. Thermocouple
(INST LVL 2) (12110-15 section 1.2.2)
,3|Page
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
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
, 4|Page
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
