NCCER INSTRUMENT TECH TEST
QUESTIONS WITH COMPLETE
ANSWERS
Whatis the first step in troubleshooting a problem in a system? - Answer-Verify that
there is a problem
Where can the appropriate elevation of an instrument be found? - Answer-Location
drawing
Chemical cleaning of tubing attached to instruments may cause damage to sensor -
Answer-Elements/
When making 90-degree tubing bend, allowance for springback should be: - Answer-1
to 3 degrees
an acceptable tool gor marking 360 degrees around the outside ot tubing Is a: - Answer-
Ferrule
What process variable is defined as the amount of force exerted by a substance over a
given unit of measure? - Answer-Pressure
Blorage of stadl wool can be considered a fire hazard when stored around - Answer-
Batterles/
The MINIMUM value of the measured process range is considered to be: - Answer-3psi
and 4ma
bubbler system is used to measure: - Answer-Head pressure
To prevent travel damage to a limit switch, use a(n) - Answer-Mechanical stop/
When using soft rolled tubing, it must be unrolled and straightened: - Answer-By hand
Where would an instrument fitter find the PROPER method to connect an instrument to
a process tap? - Answer-On an installation detail
A strain gauge measures the external force applied to a fine wire by causing a change
in - Answer-Resistance
Which of the following purging gases should be avoided for use with hydrocarbons? -
Answer-Oxygen
, A differential pressure transmitter mounted on a non-vented vessel is used to measure
the - Answer-Density of the product in the vessel?
Convert the length 2' 10-3/4" to its decimal equivalent (in feet). - Answer-2.896
Flow can be described in units of all of the following EXCEPT: - Answer-Density
When pressure testing, the required documentation includes: - Answer-Temperature,
pressure, and test medium
The MOST common method used to measure the flow of liguid in a pipe is to introduce
a restriction In the pip and measure the: - Answer-Velocity
Afteria bend is completed, all tubing will exhibit; - Answer-Springback
What valve, REQUIRES a 90-degree turn to operate the valve 100% open or closed? -
Answer-Ball valve/
Where is the drain wire terminaled in instrument system? - Answer-At the control
cabinet.
une part ona contro vaive that controis the plug proportionally to the output or the
controller is the: - Answer-Valve positioner
What type of liquid is used for degreasing electronic equipment? - Answer-Isopropyl
alcohol
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? - Answer-Lower the inlet pressure
paring acid cleaning a tubing run after installation it is very important to - Answer-Drain
low points
On a field mounted controller, the setpoint is changed: - Answer-Manually
When using a multimeter to drive loop current, the meter should be set to - Answer-
Outout mA
When an 8mA signal is connected across a 250 ohm resistor, the voltage drop across
the resistor would be: - Answer-2 volts
PTFE tape used as a sealant should be wrapped: - Answer-In the same direction as the
threads/
QUESTIONS WITH COMPLETE
ANSWERS
Whatis the first step in troubleshooting a problem in a system? - Answer-Verify that
there is a problem
Where can the appropriate elevation of an instrument be found? - Answer-Location
drawing
Chemical cleaning of tubing attached to instruments may cause damage to sensor -
Answer-Elements/
When making 90-degree tubing bend, allowance for springback should be: - Answer-1
to 3 degrees
an acceptable tool gor marking 360 degrees around the outside ot tubing Is a: - Answer-
Ferrule
What process variable is defined as the amount of force exerted by a substance over a
given unit of measure? - Answer-Pressure
Blorage of stadl wool can be considered a fire hazard when stored around - Answer-
Batterles/
The MINIMUM value of the measured process range is considered to be: - Answer-3psi
and 4ma
bubbler system is used to measure: - Answer-Head pressure
To prevent travel damage to a limit switch, use a(n) - Answer-Mechanical stop/
When using soft rolled tubing, it must be unrolled and straightened: - Answer-By hand
Where would an instrument fitter find the PROPER method to connect an instrument to
a process tap? - Answer-On an installation detail
A strain gauge measures the external force applied to a fine wire by causing a change
in - Answer-Resistance
Which of the following purging gases should be avoided for use with hydrocarbons? -
Answer-Oxygen
, A differential pressure transmitter mounted on a non-vented vessel is used to measure
the - Answer-Density of the product in the vessel?
Convert the length 2' 10-3/4" to its decimal equivalent (in feet). - Answer-2.896
Flow can be described in units of all of the following EXCEPT: - Answer-Density
When pressure testing, the required documentation includes: - Answer-Temperature,
pressure, and test medium
The MOST common method used to measure the flow of liguid in a pipe is to introduce
a restriction In the pip and measure the: - Answer-Velocity
Afteria bend is completed, all tubing will exhibit; - Answer-Springback
What valve, REQUIRES a 90-degree turn to operate the valve 100% open or closed? -
Answer-Ball valve/
Where is the drain wire terminaled in instrument system? - Answer-At the control
cabinet.
une part ona contro vaive that controis the plug proportionally to the output or the
controller is the: - Answer-Valve positioner
What type of liquid is used for degreasing electronic equipment? - Answer-Isopropyl
alcohol
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? - Answer-Lower the inlet pressure
paring acid cleaning a tubing run after installation it is very important to - Answer-Drain
low points
On a field mounted controller, the setpoint is changed: - Answer-Manually
When using a multimeter to drive loop current, the meter should be set to - Answer-
Outout mA
When an 8mA signal is connected across a 250 ohm resistor, the voltage drop across
the resistor would be: - Answer-2 volts
PTFE tape used as a sealant should be wrapped: - Answer-In the same direction as the
threads/
