Instrument tech nccer
questions with verified answers
2026
1. 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. 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. 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 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. 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. 5) A temperature measuring device that produces a voltage as the temper-
ature changes is a / an :
,A. RTD
B. Thermistor
C. Thermometer
D. Thermocouple: D. Thermocouple (INST LVL 2) (12110-15 section 1.2.2)
6. 6) A pressure piping code is found in :
A. ANSI B 31.1
B. NEC 690 .
,C. OSHA1910 .
D. ISA S 5.1: A. ANSI B 31.1
7. 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. 8) An example of direct measurement indicator is a :
A. Pressure gauge
B. Bulb thermometer
C. Sight glass
D. Flowmeter: C. Sight glass
9. 9) On the image , how many hand valves are installed on Tank 1201C A.
1
B. 2
C. 3
D. 4: C. 3
10. 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. 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. 12) Chemical cleaning of tubing attached to instruments may cause dam-
age to sensor
A. Electronics
B. Paint
, C. Elements
D. Bolts: C. Elements
13. 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: C. 1 to 3 degrees
14. 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: B. Ground at each accessible location
15. 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
C. Exclusive control
D. Remote control: C. Exclusive control
16. 16) 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 swich deadband: B. Pressure switch deadband
17. 17) In the figure provided the pipe line that carries working process fluid
such as steam water or gas is labeled as
A. A
B. B
C. C
questions with verified answers
2026
1. 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. 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. 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 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. 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. 5) A temperature measuring device that produces a voltage as the temper-
ature changes is a / an :
,A. RTD
B. Thermistor
C. Thermometer
D. Thermocouple: D. Thermocouple (INST LVL 2) (12110-15 section 1.2.2)
6. 6) A pressure piping code is found in :
A. ANSI B 31.1
B. NEC 690 .
,C. OSHA1910 .
D. ISA S 5.1: A. ANSI B 31.1
7. 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. 8) An example of direct measurement indicator is a :
A. Pressure gauge
B. Bulb thermometer
C. Sight glass
D. Flowmeter: C. Sight glass
9. 9) On the image , how many hand valves are installed on Tank 1201C A.
1
B. 2
C. 3
D. 4: C. 3
10. 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. 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. 12) Chemical cleaning of tubing attached to instruments may cause dam-
age to sensor
A. Electronics
B. Paint
, C. Elements
D. Bolts: C. Elements
13. 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: C. 1 to 3 degrees
14. 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: B. Ground at each accessible location
15. 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
C. Exclusive control
D. Remote control: C. Exclusive control
16. 16) 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 swich deadband: B. Pressure switch deadband
17. 17) In the figure provided the pipe line that carries working process fluid
such as steam water or gas is labeled as
A. A
B. B
C. C
