©THEBRIGHT EXAM SOLUTIONS
11/05/2024 12:06 PM
Instrumentation & Controls/ boma Exam
Questions With Correct Answers
What important function doesn't care receiver perform? - answer✔Dissipate heat, dampens compressor
pulsation, Act as water and oil trap
On a compressed air system a safety valve would generally be installed on the - answer✔Air receiver
Variable air volume system - answer✔Typically use the VFD's to save energy
In figure 1.3, a fool call for cooling would be at what branch pressure to the damper motor -
answer✔3PSIG
A ratio relay would be used to - answer✔Controlled the sequence of actuators
when an actuated device is said to be normally open, that means the device is open with - answer✔No
control pressure is applied
In figure 1.4, the hot water valve has a 8 to 12 psig spring range, The damper motor has a 3 to 8 psig
spring range. The calibration point of the thermostat is - answer✔8 psig
When you are setting up an instrument, you should know all of the following except - answer✔The rate
of flow of the control agent
, ©THEBRIGHT EXAM SOLUTIONS
11/05/2024 12:06 PM
Which of the following is an example of a controlled with readjusted set point - answer✔Sub master
controller
In figure 1.5, the branch pressure from the temperature controller Increases in pressure as the -
answer✔Control variable decreases in temperature
The departure of the control point from the set point, or the amount of that departure is described as -
answer✔Deviation
The action of the control that increases its branch pressure As the control variable increases -
answer✔Direct acting
In figure 1.3 maximum heating will be at what branch pressure to the damper motor? - answer✔13 psig
In figure 1.0, if the hot water control valve was N/O instead of N/C, What would the control action be -
answer✔Direct acting
A 3 way mixing valve - answer✔Has two inlets and one comment outlet
What will be the typical range of a control sensor - answer✔4-20 mA
If you increase the percentage of proportional band on a receiver controller you would in a effect -
answer✔Increase the psig/ fahrenheit output of the control
The temperature resistance characteristic of a thermistor is - answer✔Non-linear
A reasonable consumption of control air for a thermostat would be - answer✔30-40 scim
11/05/2024 12:06 PM
Instrumentation & Controls/ boma Exam
Questions With Correct Answers
What important function doesn't care receiver perform? - answer✔Dissipate heat, dampens compressor
pulsation, Act as water and oil trap
On a compressed air system a safety valve would generally be installed on the - answer✔Air receiver
Variable air volume system - answer✔Typically use the VFD's to save energy
In figure 1.3, a fool call for cooling would be at what branch pressure to the damper motor -
answer✔3PSIG
A ratio relay would be used to - answer✔Controlled the sequence of actuators
when an actuated device is said to be normally open, that means the device is open with - answer✔No
control pressure is applied
In figure 1.4, the hot water valve has a 8 to 12 psig spring range, The damper motor has a 3 to 8 psig
spring range. The calibration point of the thermostat is - answer✔8 psig
When you are setting up an instrument, you should know all of the following except - answer✔The rate
of flow of the control agent
, ©THEBRIGHT EXAM SOLUTIONS
11/05/2024 12:06 PM
Which of the following is an example of a controlled with readjusted set point - answer✔Sub master
controller
In figure 1.5, the branch pressure from the temperature controller Increases in pressure as the -
answer✔Control variable decreases in temperature
The departure of the control point from the set point, or the amount of that departure is described as -
answer✔Deviation
The action of the control that increases its branch pressure As the control variable increases -
answer✔Direct acting
In figure 1.3 maximum heating will be at what branch pressure to the damper motor? - answer✔13 psig
In figure 1.0, if the hot water control valve was N/O instead of N/C, What would the control action be -
answer✔Direct acting
A 3 way mixing valve - answer✔Has two inlets and one comment outlet
What will be the typical range of a control sensor - answer✔4-20 mA
If you increase the percentage of proportional band on a receiver controller you would in a effect -
answer✔Increase the psig/ fahrenheit output of the control
The temperature resistance characteristic of a thermistor is - answer✔Non-linear
A reasonable consumption of control air for a thermostat would be - answer✔30-40 scim
