Instrumentation NCCER Questions and
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the concept of measuring, comparing, computing, and correcting
is implemented by the --------
Ans: Control System
the operation or operations used in the treatment of materials
compromise the ------
Ans: process
the process parameters are subject to if the energy balance is ------
Ans: upset
the process parameters that is selected for control is the ---- variable
Ans: control
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the control variable is ultimately controlled by the ---- loop
Ans: controller
which parameter supplies energy or material to the process to
regulate the deviation of a process output?
Ans: manipulated variable
whcih of the following measuring detectors applies a coverging
cone shaped inlet section?
Ans: venturi tube
a detector or sensor is considered good if it is designed to minimize --
----
Ans: disturbance
if a tanks level is measured by a dipstick, this is considered-------
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Ans: direct
a thermocouple uses ------ measurement
Ans: inferred
if the output from one device is not compatible with the input it
supplies to another device, a ----- must be applied
Ans: transducer
of the following, -------transducers may convert a 0-5 volt to a 4-20
mA signal
Ans: e/i
the function a feedback transmission circuit in a contoller is to -----
Ans: convert the sensor signal into a useable controller signal
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a variable orifice that is used to regulate the flow of process fluid
according to the requirement of the process is known as a -------
Ans: control valve
the componet attached to a control valve that compares the stem
motion of the valve to the signal of the controller is the -------
Ans: actuator
the selection and interconnection of devices in an instrumenatiion
channel that ultimately determine the stability of the process are
reffered to as the -----
Ans: control loop
another name for an open loop is a ----- loop
Ans: feed forward
another name for a feedback loop is a---- loop