Instrument Tech NCCER Exam
Questions and Answers 100% Solved
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 - ✔✔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 - ✔✔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 you measure 120V between hot and
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,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 - ✔✔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 - ✔✔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 - ✔✔D. Thermocouple (INST LVL 2) (12110-15 section
1.2.2)
6) A pressure piping code is found in :
2
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,A. ANSI B 31.1
B. NEC 690 .
C. OSHA1910 .
D. ISA S 5.1 - ✔✔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 - ✔✔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 - ✔✔C. Sight glass
9) On the image , how many hand valves are installed on Tank 1201C
A. 1
B. 2
C. 3
D. 4 - ✔✔C. 3
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, 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 - ✔✔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 - ✔✔A. Location drawing
12) Chemical cleaning of tubing attached to instruments may cause
damage to sensor
A. Electronics
B. Paint
C. Elements
D. Bolts - ✔✔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
4
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
Questions and Answers 100% Solved
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 - ✔✔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 - ✔✔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 you measure 120V between hot and
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,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 - ✔✔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 - ✔✔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 - ✔✔D. Thermocouple (INST LVL 2) (12110-15 section
1.2.2)
6) A pressure piping code is found in :
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,A. ANSI B 31.1
B. NEC 690 .
C. OSHA1910 .
D. ISA S 5.1 - ✔✔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 - ✔✔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 - ✔✔C. Sight glass
9) On the image , how many hand valves are installed on Tank 1201C
A. 1
B. 2
C. 3
D. 4 - ✔✔C. 3
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, 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 - ✔✔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 - ✔✔A. Location drawing
12) Chemical cleaning of tubing attached to instruments may cause
damage to sensor
A. Electronics
B. Paint
C. Elements
D. Bolts - ✔✔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
4
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
