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Instrument tech nccer questions!
Questions and Correct Answers/ Latest
Update / Already Graded
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
Ans: 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
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Ans: 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 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
Ans: C. Lost the neutral
4) Gain increase when tube :
A. Back bends are made
B. Bend radius increases
C. Size decreases
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D. Long radius elbows are used
Ans: 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
Ans: D. Thermocouple (INST LVL 2) (12110-15 section 1.2.2)
6) A pressure piping code is found in :
A. ANSI B 31.1
B. NEC 690 .
C. OSHA1910 .
D. ISA S 5.1
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Ans: 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
Ans: 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
Ans: C. Sight glass
Instrument tech nccer questions!
Questions and Correct Answers/ Latest
Update / Already Graded
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
Ans: 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
,2 | Page
Ans: 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 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
Ans: C. Lost the neutral
4) Gain increase when tube :
A. Back bends are made
B. Bend radius increases
C. Size decreases
,3 | Page
D. Long radius elbows are used
Ans: 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
Ans: D. Thermocouple (INST LVL 2) (12110-15 section 1.2.2)
6) A pressure piping code is found in :
A. ANSI B 31.1
B. NEC 690 .
C. OSHA1910 .
D. ISA S 5.1
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Ans: 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
Ans: 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
Ans: C. Sight glass
