Instrumentation NCCER Practice Test with 230
Questions and Correct Answers/ 2025-2026 NCCER
Instrumentation Correctly Answered Practice Exam
pneumatic or electric power supplies should not be isolated or disconnected from
operating positions unless the technician understands the ---- beforehand -
ANSWER-failure modes
In instrumentation applications that incorporate a programmable logic controller,
the sequence of operation is often shown on a series of ------ - ANSWER-ladder
diagrams.
the method used to designate the correlation between the hardware input and
output connections to the PLC and the input contacts and output coils in the ladder
logic program is called ----- - ANSWER-addressing system
the sequence of detailed actions that will be necessary in the PLC program to
produce the desired result from start to finish is called ------- - ANSWER-
addressing system
in i/o wiring, check that all I/O modules are in the correct locations in accordance
with the ------ - ANSWER-I/O address assignment document
the concept of measuring, comparing, computing, and correcting is implemented
by the -------- - ANSWER-Control System
because the majority of pneumatic instruments and process cannot tolerate wet, hot
compressed air, compressors are normally supplied with moisture separators and---
-- - ANSWER-after coolers
pg. 1
,the selection and interconnection of devices in an instrumentation channel that
ultimately determine the stability of the process are referred to as the ----- -
ANSWER-control loop
if a fail as positioned valve is 50% open and pneumatic pressure is lost to the
valve, the valve will---- - ANSWER-remain 50%open
most electronic indicators that use a digital display are-----segment displays -
ANSWER-seven
switches are normally used to make or break an electrical circuit that is operating --
---- - ANSWER-within the voltage and current rating of the switch
switch contacts are often coated with a material to------ - ANSWER-prevent
oxidation
the operation or operations used in the treatment of materials compromise the ------
- ANSWER-process
the process parameters are subject to if the energy balance is ------ - ANSWER-
upset
the process parameters that is selected for control is the ---- variable - ANSWER-
control
the control variable is ultimately controlled by the ---- loop - ANSWER-controller
pg. 2
, which parameter supplies energy or material to the process to regulate the
deviation of a process output? - ANSWER-manipulated variable
which of the following measuring detectors applies a converging cone-shaped inlet
section? - ANSWER-venturi tube
a detector or sensor is considered good if it is designed to minimize ------ -
ANSWER-disturbance
if a tanks level is measured by a dipstick, this is considered------- - ANSWER-
direct
a thermocouple uses ------ measurement - ANSWER-inferred
if the output from one device is not compatible with the input it supplies to another
device, a ----- must be applied - ANSWER-transducer
of the following, -------transducers may convert a 0-5 volt to a 4-20 mA signal -
ANSWER-e/i
the function of a feedback transmission circuit in a controller is to ----- -
ANSWER-convert the sensor signal into a useable controller signal
a variable orifice that is used to regulate the flow of process fluid according to the
requirement of the process is known as a ------- - ANSWER-control valve
the component attached to a control valve that compares the stem motion of the
valve to the signal of the controller is the ------- - ANSWER-actuator
pg. 3
Questions and Correct Answers/ 2025-2026 NCCER
Instrumentation Correctly Answered Practice Exam
pneumatic or electric power supplies should not be isolated or disconnected from
operating positions unless the technician understands the ---- beforehand -
ANSWER-failure modes
In instrumentation applications that incorporate a programmable logic controller,
the sequence of operation is often shown on a series of ------ - ANSWER-ladder
diagrams.
the method used to designate the correlation between the hardware input and
output connections to the PLC and the input contacts and output coils in the ladder
logic program is called ----- - ANSWER-addressing system
the sequence of detailed actions that will be necessary in the PLC program to
produce the desired result from start to finish is called ------- - ANSWER-
addressing system
in i/o wiring, check that all I/O modules are in the correct locations in accordance
with the ------ - ANSWER-I/O address assignment document
the concept of measuring, comparing, computing, and correcting is implemented
by the -------- - ANSWER-Control System
because the majority of pneumatic instruments and process cannot tolerate wet, hot
compressed air, compressors are normally supplied with moisture separators and---
-- - ANSWER-after coolers
pg. 1
,the selection and interconnection of devices in an instrumentation channel that
ultimately determine the stability of the process are referred to as the ----- -
ANSWER-control loop
if a fail as positioned valve is 50% open and pneumatic pressure is lost to the
valve, the valve will---- - ANSWER-remain 50%open
most electronic indicators that use a digital display are-----segment displays -
ANSWER-seven
switches are normally used to make or break an electrical circuit that is operating --
---- - ANSWER-within the voltage and current rating of the switch
switch contacts are often coated with a material to------ - ANSWER-prevent
oxidation
the operation or operations used in the treatment of materials compromise the ------
- ANSWER-process
the process parameters are subject to if the energy balance is ------ - ANSWER-
upset
the process parameters that is selected for control is the ---- variable - ANSWER-
control
the control variable is ultimately controlled by the ---- loop - ANSWER-controller
pg. 2
, which parameter supplies energy or material to the process to regulate the
deviation of a process output? - ANSWER-manipulated variable
which of the following measuring detectors applies a converging cone-shaped inlet
section? - ANSWER-venturi tube
a detector or sensor is considered good if it is designed to minimize ------ -
ANSWER-disturbance
if a tanks level is measured by a dipstick, this is considered------- - ANSWER-
direct
a thermocouple uses ------ measurement - ANSWER-inferred
if the output from one device is not compatible with the input it supplies to another
device, a ----- must be applied - ANSWER-transducer
of the following, -------transducers may convert a 0-5 volt to a 4-20 mA signal -
ANSWER-e/i
the function of a feedback transmission circuit in a controller is to ----- -
ANSWER-convert the sensor signal into a useable controller signal
a variable orifice that is used to regulate the flow of process fluid according to the
requirement of the process is known as a ------- - ANSWER-control valve
the component attached to a control valve that compares the stem motion of the
valve to the signal of the controller is the ------- - ANSWER-actuator
pg. 3
