HVAC Heat Removal and Capacity Measurement

What is the unit of measurement for air quantity in FPS units?

BTU/Hr
KWH
CFM (correct)
Lbs/Hr

How can the air quantity in Lbs/Hr be calculated from CFM?

Lbs/Hr = (CFM x 30) / 10.4
Lbs/Hr = (CFM x 30) / 14.4
Lbs/Hr = (CFM x 60) / 14.4 (correct)
Lbs/Hr = (CFM x 60) / 10.4

What is the formula to calculate the heat removed in the coil in BTU/Hr?

Heat removed = TR x 2545 x BHP / 12000
Heat removed = Qty.of air x heat removed
Heat removed = (CFM x 60) / 14.4
Heat removed = Lbs/Hr x heat removed (BTU-Hr/Lb) (correct)

What is the parameter used to calculate the capacity of the compressor?

Suction pressure, discharge pressure, RPM of compressor, and number of loaded cylinders (C) Signup and view all the answers

What is the formula to calculate the heat rejected in the condenser?

Heat rejected = compressor capacity + work done by compressor (D) Signup and view all the answers

What is the purpose of heat load estimation in HVAC systems?

To balance the heat flow into and out of the conditioned space (C) Signup and view all the answers

What is the unit of measurement for air-conditioning and refrigeration?

Tons of Refrigeration (D) Signup and view all the answers

What type of heat gain occurs when direct or diffused solar heat energy enters the room through glass windows?

Radiation gain (C) Signup and view all the answers

What is the purpose of shading devices such as Venetian blinds and sunshades?

To limit radiation gain into the room (B) Signup and view all the answers

What is the formula to calculate the capacity of a chiller in TR?

GPM x temp Diff / 24 (D) Signup and view all the answers

What is the term used to describe the percentage of radiation that is allowed into the room through the glass after considering the shading effect?

Shading factor (A) Signup and view all the answers

What is the range of room temperature applicable for the given air conditioner?

22 to 28°C (D) Signup and view all the answers

What is the range of relative humidity applicable for the given air conditioner?

50 to 70% (C) Signup and view all the answers

What is the ESP of the given air conditioner?

25mmWG (C) Signup and view all the answers

What is the range of capacities available for the given air conditioner in TR?

5 to 145 TR (D) Signup and view all the answers

What is the unit of measurement for the specific gravity of materials?

g/cm³ (A) Signup and view all the answers

What are the properties of materials that are mentioned in the text?

Physical, chemical, and thermal properties (B) Signup and view all the answers

What is the primary focus of the properties of materials discussed in the topic?

Physical and chemical properties (A) Signup and view all the answers

What is the term that describes the change in volume of a material in response to a change in temperature?

Coefficient of thermal expansion (C) Signup and view all the answers

What is the primary difference between a lubricated and non-lubricated compressor?

Presence of lubricant (C) Signup and view all the answers

What is the term that describes the ability of a material to conduct electricity?

Electrical conductivity (A) Signup and view all the answers

What is the primary function of an IGV in a centrifugal compressor?

To guide the air flow (C) Signup and view all the answers

What is the term that describes the ability of a material to resist corrosion?

Corrosion resistance (B) Signup and view all the answers

What is the primary purpose of an agitator in a process industry?

To induce motion and provide circulation (D) Signup and view all the answers

What is the main difference between agitation and mixing?

Agitation induces motion, while mixing is the random distribution of two or more phases or substances (A) Signup and view all the answers

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