17. What is the closest size of an air duct that is designed to supply 1,000...

 

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17. What is the closest size of an air duct that is designed to supply 1,000 CFM at a friction loss of 0.08 inches of water per 100 ft length? A. 18 inch diameter B. 16 inch diameter C. 14 inch diameter D. 12 inch diameter 18. When using rectangular ducts it is always best to choose the highest aspect ratio where the aspect ratio is defined as the cross-sectional width divided by the cross-sectional height) A. True B. False noivovat how metinya neitsy for 101shoqovs ad 19. In a dessicant cooling system cooling is accomplished by the absorption of moisture into the dessicant followed by evaporative cooling. A. True B. False 00eva sitt mont blog jes bre sernabnos sit 20. ASHRAE has developed the Minimum Efficiency Reporting Value (MERV) to define how well an air filter can trap airborne particles. What would the MERV rating be of a filter that can trap tabacco smoke? A. MERV 1 to 4 B. MERV 5 to 8 C. MERV 9 to 12 D. MERV 13 to 16 sulovs w now E metsb of S ginale galmohan mataya aid wod milib (S) ON 21. In a forced-air heating/cooling system the return air path is an important part of the system. For an HVAC system that has the main return air path in the hallway which of the following concepts would NOT be considered a valid return path: A. Undercut hallway door that serves the room. B. A grill cut into the door that serves the room. C. A jump duct connecting the room to the hallway D. A jump duct connecting the room to the attic. A. Reheat system B. Bypass system SUST ( 52001 (6 22. In an HVAC system that serves a commercial building it is often necessary to cool and wat dehumidify air entering a zone during the cooling season. Two types of single-zone HVAC systems that accomplish cooling and dehumidifying are reheat systems and cooling-coil bypass systems. Which system is considered to be more efficient? 23. During very cold outdoor conditions an HVAC system may preheat incoming outside air by extracting heat from exhaust air before it is sent outside the building. One such HVAC system uses a "run-around" coil to take heat from the exhaust air and preheat air coming into the system from the outside. A. True B. False 17. What is the closest size of an air duct that is designed to supply 1,000 CFM at a friction loss of 0.08 inches of water per 100 ft length? A. 18 inch diameter B. 16 inch diameter C. 14 inch diameter D. 12 inch diameter 18. When using rectangular ducts it is always best to choose the highest aspect ratio where the aspect ratio is defined as the cross-sectional width divided by the cross-sectional height) A. True B. False noivovat how metinya neitsy for 101shoqovs ad 19. In a dessicant cooling system cooling is accomplished by the absorption of moisture into the dessicant followed by evaporative cooling. A. True B. False 00eva sitt mont blog jes bre sernabnos sit 20. ASHRAE has developed the Minimum Efficiency Reporting Value (MERV) to define how well an air filter can trap airborne particles. What would the MERV rating be of a filter that can trap tabacco smoke? A. MERV 1 to 4 B. MERV 5 to 8 C. MERV 9 to 12 D. MERV 13 to 16 sulovs w now E metsb of S ginale galmohan mataya aid wod milib (S) ON 21. In a forced-air heating/cooling system the return air path is an important part of the system. For an HVAC system that has the main return air path in the hallway which of the following concepts would NOT be considered a valid return path: A. Undercut hallway door that serves the room. B. A grill cut into the door that serves the room. C. A jump duct connecting the room to the hallway D. A jump duct connecting the room to the attic. A. Reheat system B. Bypass system SUST ( 52001 (6 22. In an HVAC system that serves a commercial building it is often necessary to cool and wat dehumidify air entering a zone during the cooling season. Two types of single-zone HVAC systems that accomplish cooling and dehumidifying are reheat systems and cooling-coil bypass systems. Which system is considered to be more efficient? 23. During very cold outdoor conditions an HVAC system may preheat incoming outside air by extracting heat from exhaust air before it is sent outside the building. One such HVAC system uses a "run-around" coil to take heat from the exhaust air and preheat air coming into the system from the outside. A. True B. False