NCCER Exam Review | 100% Correct
Answers | Verified | Latest 2024 Version
The density of a liquid affects the displacer's:
length
height
buoyancy - ✔✔buoyancy
What mode MUST the controller be in before any changes are made to the process variable?
automatic
manual
shut-down
power off - ✔✔manual
Bills of material are found in:
general arrangement drawings
P&ID
piping orthographics
instrument detail drawings - ✔✔general arrangement drawings
When bench calibrating a temperature RTD transmitter, the instrument technician should apply:
hot air pressure
cold air pressure
resistance
,voltage - ✔✔resistance
Before working on a de-energized circuit containing a capacitor, what must be done?
discharge the capacitor
re-energize the circuit
defibrillate the system
remove the lockouts - ✔✔discharge the capacitor
The MINIMUM value of the measured process range is considered to be:
upper measured value
3 psi and 4 ma
zero input value
span value - ✔✔3 psi and 4 ma
A solenoid valve is often used to
regulate temperature
direct airflow that opens or closes an air operated valve
regulate the amp that is used to open/close control valve
control the voltage that is used to open/close contacts - ✔✔direct airflow that opens or closes an air-
operated valve
Viscosity is analyzed in all of the following ways EXCEPT:
the falling all method
the viscositron method
the rotating disc method
,the capillary method - ✔✔the viscositron method
The process parameter that is selected for control is called the:
process rate
controlled energy
process setpoint
controlled variable - ✔✔controlled variable
Optimal gain is the MAXIMUM allowable value of gain in which the system is:
stable
oscillating
at its highest amplitude
NOT responding - ✔✔stable
Carbon dioxide is produced commercially:
by extraction from the atmosphere
as a byproduct of manufacturing
by extraction from ocean water
through chemical bonding - ✔✔as a byproduct of manufacturing
The MOST reliable relay is a/an:
EMR
pneumatic
SSR
, LED - ✔✔SSR
In modulating control, the first step is to compute the error between controlled variable and setpoint.
The second step is to produce a(n):
output signal
modulating mode
feedback set point
process feedback - ✔✔output signal
A dashpot timer relay:
is well suited for fast on-off cycles
is a type of pneumatic relay
has NO moving parts
requires a long reset time - ✔✔is a type of pneumatic relay
A photosensor is a:
double throw double pole switch
silicone-controlled rectifier
variable resistor
transformer - ✔✔silicone-controlled rectifier
MOST pneumatic receivers operate in the range of:
1-5 psi
0-10 psi
3-15 psi
Answers | Verified | Latest 2024 Version
The density of a liquid affects the displacer's:
length
height
buoyancy - ✔✔buoyancy
What mode MUST the controller be in before any changes are made to the process variable?
automatic
manual
shut-down
power off - ✔✔manual
Bills of material are found in:
general arrangement drawings
P&ID
piping orthographics
instrument detail drawings - ✔✔general arrangement drawings
When bench calibrating a temperature RTD transmitter, the instrument technician should apply:
hot air pressure
cold air pressure
resistance
,voltage - ✔✔resistance
Before working on a de-energized circuit containing a capacitor, what must be done?
discharge the capacitor
re-energize the circuit
defibrillate the system
remove the lockouts - ✔✔discharge the capacitor
The MINIMUM value of the measured process range is considered to be:
upper measured value
3 psi and 4 ma
zero input value
span value - ✔✔3 psi and 4 ma
A solenoid valve is often used to
regulate temperature
direct airflow that opens or closes an air operated valve
regulate the amp that is used to open/close control valve
control the voltage that is used to open/close contacts - ✔✔direct airflow that opens or closes an air-
operated valve
Viscosity is analyzed in all of the following ways EXCEPT:
the falling all method
the viscositron method
the rotating disc method
,the capillary method - ✔✔the viscositron method
The process parameter that is selected for control is called the:
process rate
controlled energy
process setpoint
controlled variable - ✔✔controlled variable
Optimal gain is the MAXIMUM allowable value of gain in which the system is:
stable
oscillating
at its highest amplitude
NOT responding - ✔✔stable
Carbon dioxide is produced commercially:
by extraction from the atmosphere
as a byproduct of manufacturing
by extraction from ocean water
through chemical bonding - ✔✔as a byproduct of manufacturing
The MOST reliable relay is a/an:
EMR
pneumatic
SSR
, LED - ✔✔SSR
In modulating control, the first step is to compute the error between controlled variable and setpoint.
The second step is to produce a(n):
output signal
modulating mode
feedback set point
process feedback - ✔✔output signal
A dashpot timer relay:
is well suited for fast on-off cycles
is a type of pneumatic relay
has NO moving parts
requires a long reset time - ✔✔is a type of pneumatic relay
A photosensor is a:
double throw double pole switch
silicone-controlled rectifier
variable resistor
transformer - ✔✔silicone-controlled rectifier
MOST pneumatic receivers operate in the range of:
1-5 psi
0-10 psi
3-15 psi
