K
C
LO
YC
INSTRUMENTATION &
CONTROLS /BOMA EXAM
D
QUESTIONS WITH CORRECT
U
ANSWERS ALL VERIFIED BY
ST
AN EXPERT A+ GRADED
(LATEST UPDATE)
, What important function doesn't the care receiver perform? - ANS 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 - ANS Air
receiver
Variable air volume system - ANS 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 -
ANS 3PSIG
K
A ratio relay would be used to - ANS Controlled the sequence of actuators
C
when an actuated device is said to be normally open, that means the device is open with - ANS
No control pressure is applied
LO
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 - ANS 8 psig
When you are setting up an instrument, you should know all of the following except - ANS
The rate of flow of the control agent
YC
Which of the following is an example of a controlled with readjusted set point - ANS Sub
master controller
In figure 1.5, the branch pressure from the temperature controller Increases in pressure as the -
ANS Control variable decreases in temperature
D
The departure of the control point from the set point, or the amount of that departure is
described as - ANS Deviation
U
The action of the control that increases its branch pressure As the control variable increases -
ANS Direct acting
ST
In figure 1.3 maximum heating will be at what branch pressure to the damper motor? - ANS
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 - ANS Direct acting
A 3 way mixing valve - ANS Has two inlets and one comment outlet
What will be the typical range of a control sensor - ANS 4-20 mA
C
LO
YC
INSTRUMENTATION &
CONTROLS /BOMA EXAM
D
QUESTIONS WITH CORRECT
U
ANSWERS ALL VERIFIED BY
ST
AN EXPERT A+ GRADED
(LATEST UPDATE)
, What important function doesn't the care receiver perform? - ANS 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 - ANS Air
receiver
Variable air volume system - ANS 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 -
ANS 3PSIG
K
A ratio relay would be used to - ANS Controlled the sequence of actuators
C
when an actuated device is said to be normally open, that means the device is open with - ANS
No control pressure is applied
LO
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 - ANS 8 psig
When you are setting up an instrument, you should know all of the following except - ANS
The rate of flow of the control agent
YC
Which of the following is an example of a controlled with readjusted set point - ANS Sub
master controller
In figure 1.5, the branch pressure from the temperature controller Increases in pressure as the -
ANS Control variable decreases in temperature
D
The departure of the control point from the set point, or the amount of that departure is
described as - ANS Deviation
U
The action of the control that increases its branch pressure As the control variable increases -
ANS Direct acting
ST
In figure 1.3 maximum heating will be at what branch pressure to the damper motor? - ANS
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 - ANS Direct acting
A 3 way mixing valve - ANS Has two inlets and one comment outlet
What will be the typical range of a control sensor - ANS 4-20 mA
