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Exam (elaborations)

BOMA-HVAC LATEST UPDATE 2024

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  • Course
  • BOMA - Instrumentation & Controls
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  • BOMA - Instrumentation & Controls

The man whose work is considered the real beginning of the science of air-conditioning _____. - ANSWER Willis Carrier Psychrometry refers to the relationship between _____ and _____. - ANSWER Humidity; air The amount of moisture in the air compared to how much it can hold is _____. - ANSWER R...

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  • November 3, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • boma
  • BOMA - Instrumentation & Controls
  • BOMA - Instrumentation & Controls
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shantelleG
BOMA-HVAC LATEST UPDATE 2024

The man whose work is considered the real beginning of the science of air-conditioning _____. -
ANSWER Willis Carrier



Psychrometry refers to the relationship between _____ and _____. - ANSWER Humidity; air



The amount of moisture in the air compared to how much it can hold is _____. - ANSWER Relative
humidity



The human bodies well being depends upon the _____. - ANSWER Bodies metabolism



The device used to determine the moisture content of air is the _____ - ANSWER psychrometer



Of the fuels listed the one that is the most efficient is _____. - ANSWER Gas



The effective temperature takes into consideration the effect of _____ and _____. - ANSWER Humidity;
temperature



Air conditioning is the control of the _____, _____, _____ and _____. - ANSWER Temperature, humidity,
purity and distribution of air.



The element that makes up the greatest percentage by volume of air is _____. - ANSWER Nitrogen



Steam gives off a great amount of heat because of its _____. - ANSWER Specific heat



The velocity of air moving thru a fan system is expressed in _____. - ANSWER Feet per minute



What volume of air will move thru a duct 24x18 at velocity of 450 feet per minute? - ANSWER 1350 cfm

, The following types of fans are classified as centrifugal fans. - ANSWER Forward curved, radial and
backward curved



A diulating switch is used to _____. - ANSWER Change proportional action to two position control.



A ratio relay is used to _____. - ANSWER Provide sequence control of more than one actuator.



A proportional control: - ANSWER Where a movement from the set point produces a proportional
movement of the actuator



A three way diverting valve: - ANSWER has two outlets and one common inlet



Heat will continue to flow between two bodies until they have the same amount of _____. - ANSWER
Sensible heat



Heat which causes a change of state is _____. - ANSWER Latent heat



The refrigeration effect of a refrigerant is improved by _____. - ANSWER Subcooling the liquid.



In the refrigeration cycle, the medium that picks up the heat is the _____. - ANSWER refrigerant.



A heat exchanger _____. - ANSWER Subcools the liquid refrigerant



Calculations involving heat load of people takes into consideration heat due to _____ and _____. -
ANSWER Latent heat; sensible heat



The flow control device used to maintain system temperature is the _____. - ANSWER Evaporator
pressure valve

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