INSTRUMENT TECH NCCER QUESTIONS WITH ANSWERS
1) Where should a DP flow transmitters high pressure side be connected to the orifice tape
A. Upstream
B. Downstream
C. Top
D. Bottom
A. Upstream
2) The set point on a controller is a specific valve at which
A. The system is initially calibrated but not maintained
B. The system shuts down
C. A process variable is to be maintained
D. The system begins operating
C. A process variable is to be maintained
3) The part of a control valve that controls the plug proportionally to the output of the
controller is the :
A. Hand wheel operator
B. Valve positioner
C. Operating spring
D. Diaphragm
B. Valve positioner
4) Workers should always assume that all electrical equipment and lines are
A. Deenergized until proven
B. Energized until proven
C. Proven with a hot stick
D. Proven by another employee
B. Energized until proven
5) The main function of a transducer is to :
A. Convert once signal form into another signal form
B. Reduce primary voltage to low voltage
C. Convert motion to frequency
D. Amplify and retransmit an instrument signal
A. Convert once signal form into another signal form
,6) What type of liquid is used for degreasing electronic equipment
A. Acid Solvents
B. Basic Solvents
C. Isopropyl alcohol
D. Water
C. Isopropyl alcoholic
7) The high pressure gas line has a large self - operated regulator . Inlet pressure is 300psi ;
Outlet pressure is 100psi . The regulator is sluggish during load changes . What is the first step
to improve the operation of the regulator ?
A. Repair the regulator
B. Lower the inlet pressure
C. Raise the outlet pressure
D. Replace the regulator
B. Lower the inlet pressure
8) During acid cleaning a tubing run after installation it is very important to
A. Place a basin at the end of the run
B. Leave all valves open throughout the run
C. Vent high points
D. Drain low points
D. Drain low points
9) On a field mounted controller , the setpoint is changed :
A. Automatically
B. Remotely
C. By the control room operator
D. Manually
C. By the control room operator
10) When using a multimeter to drive loop current , the meter should be set to
A. MA
B. DC Voltage
C. Ohms
D. Output MA
D. Output MA
,11) In a non linear power supply the dc output voltage is regulated by
A. TDR
B. Capacitor
C. Resistor
D. SCR
D. SCR
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
D. 0 degrees
C. 1 to 3 degrees
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) 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) 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) 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
D. D
A. A
18) A heat reactive dryer is producing damp instrument air what could be a simple fix
A. Replace desiccant
B. Change to a different desiccant
C. Adjust the cycle time
D. Add a second set of dryers
C. Adjust the cycle time
19) Type J thermocouple extension wire is
A. White & red
B. Yellow & red
C. Blue & red
D. Green & red
A. White & red
20) Which of the following gases should be used to purge tubing and pipe after cleaning
A. argon
B. Air
C. Nitrogen
D. helium
C. Nitrogen
21) When pressure testing , the required documentation includes :
A. Specification sheets
1) Where should a DP flow transmitters high pressure side be connected to the orifice tape
A. Upstream
B. Downstream
C. Top
D. Bottom
A. Upstream
2) The set point on a controller is a specific valve at which
A. The system is initially calibrated but not maintained
B. The system shuts down
C. A process variable is to be maintained
D. The system begins operating
C. A process variable is to be maintained
3) The part of a control valve that controls the plug proportionally to the output of the
controller is the :
A. Hand wheel operator
B. Valve positioner
C. Operating spring
D. Diaphragm
B. Valve positioner
4) Workers should always assume that all electrical equipment and lines are
A. Deenergized until proven
B. Energized until proven
C. Proven with a hot stick
D. Proven by another employee
B. Energized until proven
5) The main function of a transducer is to :
A. Convert once signal form into another signal form
B. Reduce primary voltage to low voltage
C. Convert motion to frequency
D. Amplify and retransmit an instrument signal
A. Convert once signal form into another signal form
,6) What type of liquid is used for degreasing electronic equipment
A. Acid Solvents
B. Basic Solvents
C. Isopropyl alcohol
D. Water
C. Isopropyl alcoholic
7) The high pressure gas line has a large self - operated regulator . Inlet pressure is 300psi ;
Outlet pressure is 100psi . The regulator is sluggish during load changes . What is the first step
to improve the operation of the regulator ?
A. Repair the regulator
B. Lower the inlet pressure
C. Raise the outlet pressure
D. Replace the regulator
B. Lower the inlet pressure
8) During acid cleaning a tubing run after installation it is very important to
A. Place a basin at the end of the run
B. Leave all valves open throughout the run
C. Vent high points
D. Drain low points
D. Drain low points
9) On a field mounted controller , the setpoint is changed :
A. Automatically
B. Remotely
C. By the control room operator
D. Manually
C. By the control room operator
10) When using a multimeter to drive loop current , the meter should be set to
A. MA
B. DC Voltage
C. Ohms
D. Output MA
D. Output MA
,11) In a non linear power supply the dc output voltage is regulated by
A. TDR
B. Capacitor
C. Resistor
D. SCR
D. SCR
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
D. 0 degrees
C. 1 to 3 degrees
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) 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) 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) 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
D. D
A. A
18) A heat reactive dryer is producing damp instrument air what could be a simple fix
A. Replace desiccant
B. Change to a different desiccant
C. Adjust the cycle time
D. Add a second set of dryers
C. Adjust the cycle time
19) Type J thermocouple extension wire is
A. White & red
B. Yellow & red
C. Blue & red
D. Green & red
A. White & red
20) Which of the following gases should be used to purge tubing and pipe after cleaning
A. argon
B. Air
C. Nitrogen
D. helium
C. Nitrogen
21) When pressure testing , the required documentation includes :
A. Specification sheets
