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What important functions does an air receiver perform? Dissipates heat, Dampens compressor pulsations, Act as water oil trap On a compressed air system a safety valve would generally be installed on the? Air receiver Variable air volume system? Typic $12.49   Add to cart

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What important functions does an air receiver perform? Dissipates heat, Dampens compressor pulsations, Act as water oil trap On a compressed air system a safety valve would generally be installed on the? Air receiver Variable air volume system? Typic

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  • Instrumentation & Controls/ boma
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  • Instrumentation & Controls/ Boma

What important functions does an air receiver perform? Dissipates heat, Dampens compressor pulsations, Act as water oil trap On a compressed air system a safety valve would generally be installed on the? Air receiver Variable air volume system? Typically use VFDs to save energy In figu...

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  • November 16, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Instrumentation & Controls/ boma
  • Instrumentation & Controls/ boma
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TopMarks1
Top Mark Questions and Correct Verified Answers



Instrumentation & Controls/ boma
Questions and Correct Verified Answers
What important function doesn't care receiver perform?


✓ 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


✓ Air receiver



Variable air volume system


✓ 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


✓ 3PSIG



A ratio relay would be used to


✓ Controlled the sequence of actuators



when an actuated device is said to be normally open, that means the device is open

with


✓ No control pressure is applied




Top Mark !!!

, Top Mark Questions and Correct Verified Answers

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


✓ 8 psig



When you are setting up an instrument, you should know all of the following except


✓ The rate of flow of the control agent



Which of the following is an example of a controlled with readjusted set point


✓ Sub master controller



In figure 1.5, the branch pressure from the temperature controller Increases in pressure

as the


✓ Control variable decreases in temperature



The departure of the control point from the set point, or the amount of that departure

is described as


✓ Deviation



The action of the control that increases its branch pressure As the control variable

increases


✓ Direct acting



In figure 1.3 maximum heating will be at what branch pressure to the damper motor?


Top Mark !!!

, Top Mark Questions and Correct Verified Answers

✓ 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


✓ Direct acting



A 3 way mixing valve


✓ Has two inlets and one comment outlet



What will be the typical range of a control sensor


✓ 4-20 mA



If you increase the percentage of proportional band on a receiver controller you would

in a effect


✓ Increase the psig/ fahrenheit output of the control



The temperature resistance characteristic of a thermistor is


✓ Non-linear



A reasonable consumption of control air for a thermostat would be


✓ 30-40 scim




Top Mark !!!

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