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NCCER Instrument Technician Final Exam 2025 | Updated Questions and Correct Answers, Exams of Construction

Connecticut College (Conn College)Construction

NCCER Instrument Technician Final Exam 2025 | Updated Questions and Correct Answers | Graded A+ | Verified Answers | Brand New Version!

Typology: Exams

2024/2025

Available from 05/20/2025

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NCCER Instrument Technician Final Exam 2025
| Updated Questions and Correct Answers |
Graded A+ | Verified Answers | Brand New
Version!
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 ---------CORRECT 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 ---------CORRECT 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 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
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Download NCCER Instrument Technician Final Exam 2025 | Updated Questions and Correct Answers and more Exams Construction in PDF only on Docsity!

NCCER Instrument Technician Final Exam 2025

| Updated Questions and Correct Answers |

Graded A+ | Verified Answers | Brand New

Version!

  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 ---------CORRECT 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 ---------CORRECT 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 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 ---------CORRECT ANSWER-----------------C. Lost the neutral

  1. Gain increase when tube : A. Back bends are made B. Bend radius increases C. Size decreases D. Long radius elbows are used ---------CORRECT ANSWER-----------------B. Bend radius increases (INST LVL 2)(12302-15 section 2.1.1)
  2. A temperature measuring device that produces a voltage as the temperature changes is a / an : A. RTD B. Thermistor C. Thermometer D. Thermocouple ---------CORRECT ANSWER-----------------D. Thermocouple (INST LVL 2) (12110-15 section 1.2.2)
  3. A pressure piping code is found in : A. ANSI B 31. B. NEC 690.
  1. 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 ---------CORRECT ANSWER-----------------C. Verify that there is a problem
  2. Where can the appropriate elevation of an instrument be found? A. Location drawing B. P & ID C. Flow diagram D. Loop drawing ---------CORRECT ANSWER-----------------A. Location drawing
  3. Chemical cleaning of tubing attached to instruments may cause damage to sensor A. Electronics B. Paint C. Elements D. Bolts ---------CORRECT ANSWER-----------------C. Elements
  1. 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 ---------CORRECT ANSWER-----------------C. 1 to 3 degrees
  2. 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 ---------CORRECT ANSWER---- -------------B. Ground at each accessible location
  3. 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 ---------CORRECT ANSWER-----------------C. Exclusive control
  1. Type J thermocouple extension wire is A. White & red B. Yellow & red C. Blue & red D. Green & red ---------CORRECT ANSWER-----------------A. White & red
  2. Which of the following gases should be used to purge tubing and pipe after cleaning A. argon B. Air C. Nitrogen D. helium ---------CORRECT ANSWER-----------------C. Nitrogen
  3. When pressure testing , the required documentation includes : A. Specification sheets B. Troubleshooting flow charts C. Temperature , pressure , and test medium D. Required corrective measures ---------CORRECT ANSWER-----------------C. Temperature , pressure , and test medium 22)An air - to - open valve uses a : A. Fail - in - position actuator

B. Spring - to - open actuator C. Dual spring actuator D. Spring - to - close actuator ---------CORRECT ANSWER-----------------D. Spring-to- close Actuator

  1. The MOST common method used to measure the flow of liquid in a pipe is to introduce a restriction in the pipe and measure the : A. Velocity B. Pressure C. Differential pressure D. Viscosity ---------CORRECT ANSWER-----------------A. Velocity
  2. What is the resistance in the circuit? A. 50 ohms B. 100 ohms C. 150 ohms D. 200 ohms ---------CORRECT ANSWER-----------------D. 200 ohms
  3. After a bend is completed , all tubing will exhibit : A. Hardness B. Springback C. Bending errors
  1. For temperatures exceeding 1500 degrees Fahrenheit a common gasket material A. Rubber B. Silicone C. Vinyl D. Ceramic ---------CORRECT ANSWER-----------------D. Ceramic
  2. An air to open valve is uses a A. Fail - in - position actuator B. Spring - to - open actuator C. Dual spring actuator D. Spring - to - close actuator ---------CORRECT ANSWER-----------------B. Spring - to - open actuator
  3. All of the following are typically applications of photocells except A. automatic lighting control B. position sensing C. battery charging D. size detection ---------CORRECT ANSWER-----------------C. battery charging
  4. What is the voltage drop as measured at R A. 4.8 VDC

B. 9.6 VDC

C. 14.4 VDC

D. 24.0 VDC ---------CORRECT ANSWER-----------------A. 4.8 VDC

  1. Which is a symbol for a globe valye? A. A B. B C. C D. D ---------CORRECT ANSWER-----------------C. C
  2. The positive wire color on a type K extension wire is A. red B. black C. yellow D. blue ---------CORRECT ANSWER-----------------C. yellow
  3. Type K thermocouple wire is A. Purple & Red B. White & Red C. Yellow & Red D. Blue & Red ---------CORRECT ANSWER-----------------C. Yellow & Red
  1. Flow measurement is determined by fluid oscillations in which type of flow meter A. Variable area flow meter B. vortex flow meter C. turbine flow meter D. coriolis flow meter ---------CORRECT ANSWER-----------------B. vortex flow meter
  2. The function of a control valve is to A. Control , throttle , and monitor flow B. Start , stop , and regulate flow C. Stop , start , and measure flow D. Throttle , start , and measure flow ---------CORRECT ANSWER-----------------B. Start, stop, and regulate flow
  3. When an 8mA signal is connected across a 250 ohm resistor , the voltage drop across the resistor would be : A. 1 volt B. 2 volts C. 3 volts D. 4 volts ---------CORRECT ANSWER-----------------B. 2 volts
  1. PTFE tape used as a sealant should be wrapped : A. In the same direction as the threads B. In the opposite direction of the threads. C. In either direction D. 4 inch past the threads ---------CORRECT ANSWER-----------------A. In the same direction as the threads
  2. What is a common material used to minimize moisture in the instrumentation ? A. Desiccant B. Silica clay C. Cotton D. Wood shavings ---------CORRECT ANSWER-----------------A. Desiccant
  3. The pneumatic output of a 3-15 psi instrument is at 50 %. The actual output in pressure is : A. 3 psi B. 6 psi C. 9 psi D. 15 psi ---------CORRECT ANSWER-----------------C. 9 psi
  4. The standards of which organization identify the characteristics of metals used for piping?
  1. In a cascade control loop what does a primary control loop determine for the secondary control loop A. Deviation B. Feedback C. Ratio D. Setpoint ---------CORRECT ANSWER-----------------D. Setpoint
  2. Which wire brush is the best brush for stainless steel materials A. Brass B. Carbon C. Nylon D. stainless steel ---------CORRECT ANSWER-----------------D. stainless steel
  3. Instrument loop where would wet instrument air show up first A. In the air piping B. at the dryer C. in the fitting regulator D. at the valve positioner ---------CORRECT ANSWER-----------------B. at the dryer
  1. What document should be checked to verify that the correct instrument is being used for a particular job A. packing slip B. Loop drawing C. bill of material D. instrument data sheet ---------CORRECT ANSWER-----------------C. bill of material
  2. how many inches of WC are in 3 psig A. 40.68 WC B. 44.1 WC C. 62.4 WC D. 83.04 WC ---------CORRECT ANSWER-----------------D. 83.04 WC
  3. what organization issues the guidelines used for lockout procedures A. ASME B. OSHA C. NFPA D. NEC ---------CORRECT ANSWER-----------------B. OSHA
  4. What is the purpose of I / P in a control loop A. Indicates the actual position of the control valve B. convert the controllers electrical signal to the control pressure

C. Capacitance D. Inductance ---------CORRECT ANSWER-----------------B. Resistance

  1. Which of the following purging gases should be avoided for use with hydrocarbons? A. Air B. Nitrogen C. Carbon dioxide D. Oxygen ---------CORRECT ANSWER-----------------D. Oxygen
  2. A differential pressure transmitter mounted on a non - vented vessel is used to measure the : A. Level of the product in the vessel B. Rate of flow of product out the vessel C. Density of the product in the vessel D. Rate of flow of product into the vessel ---------CORRECT ANSWER-----------------C. Density of the product in the vessel
  3. Convert the length 2 ' 10-3 / 4 " to its decimal equivalent ( in feet ). A. 2.750 ' B. 2.896 ' C. 2.910 '

D. 2.950 ' ---------CORRECT ANSWER-----------------B. 2.896 '

  1. Using the image , the valve shown is NOT : A. Spring - to - open B. Air - to - close C. Air - to - open D. Fail open ---------CORRECT ANSWER-----------------C. Air to open
  2. Flow can be described in units of all of the following EXCEPT : A. Volume B. Density C. Mass D. velocity ---------CORRECT ANSWER-----------------B. Density
  3. Which of the following should not be considered when cleaning instruments A. area ventilation B. ignition source C. cleaning frequency D. solvent compatibility ---------CORRECT ANSWER-----------------C. cleaning frequency