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10 Cards in this Set
- Front
- Back
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Which of the following is false about a hydronic heat pump system? 1) The system can be thermally self-balancing when heat rejected by the interior zones is used by the exterior zones 2) A boiler is not required during the heating season 3) Pipe insulation is not required as the water temperature is above the room air dewpoint 4) The unit discharges heat to the water piping system during the cooling mode 5) The water temperature must be between 15ºC and 32ºC |
A boiler is not required during the heating season |
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A combined HVAC system offers the following advantages over a central air system. 1. Control is better when the number of zones is increased 2. Usually requires less building space for mechanical equipment and duct work 3. They are generally more efficient in operation 4. Ventilation to zones that are not needed can be shut or the temperature can be regulated differently 5. Additional cooling can be provided to zones that receive heat from solar radiation 1) 1, 3, 4 2) 1, 2, 3, 4 3) 2, 3, 4, 5 4) 1, 2, 3 5) 1, 2, 3, 4, 5 |
5) 1, 2, 3, 4, 5 |
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To maintain space conditions during heating, this system zone thermostat reduces the air flow to a minimum of 20% before modulating the output of the heat supply. 1) Fan coil unit with make up air system 2) Dual duct system 3) Hydronic heat pump system 4) Constant air volume system 5) Variable air volume system |
Variable air volume system |
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Which statement is false for compartmental variable air volume systems? 1) Smaller air handling units are located on each floor replacing a larger central unit 2) A central air handling unit provides humidified air at 12.5ºC for ventilation to each floor 3) These units are very energy efficient 4) Each air handling unit has its own filter, cooling coil and supply air fan 5) Each air handling unit is installed in a mechanical room for noise reduction, safety and appearance |
These units are very energy efficient |
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An induction system gets its name from which property of the system? 1) The way air in the room is circulated 2) The type of units in each zone 3) The type of air handling unit 4) The volume of air conditioned 5) The air used in the central element of the system |
The way air in the room is circulated |
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When looking at building function to select a system, which of the following factors are being considered? 1. The physical size of the building 2. Climatic conditions 3. The amount of zoning required 4. Funds available for the system 5. Occupancy periods 6. The need to operate certain areas off hours 1) 1, 2, 6 2) 3, 5, 6 3) 1, 3, 4, 6 4) 2, 5, 6 5) 1, 3, 4, 5, 6 |
2) 3, 5, 6 |
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Which of the following is true about fan coil units with a make up air system? 1. They are used extensively in motels and hotels 2. They have a minimum space requirement 3. The initial cost is relatively low 4. They have a high degree of individual zone control 5. They provide heating, cooling, filtration and air circulation 1) 1, 2, 3, 4, 5 2) 2, 3, 4, 5 3) 2, 3, 4 4) 1, 2, 3 5) 1, 2, 3, 4 |
1, 2, 3, 4, 5 |
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The high-pressure induction system uses _____ to provide room air circulation. 1) Differential temperature 2) A nozzle arrangement 3) A mixing box 4) A small fan 5) Several fans on one shaft |
A nozzle arrangement |
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Which of the following is false about constant air volume systems with perimeter heating? 1) The cooling and reheating of supply air is not energy efficient unless the zone is at maximum cooling 2) Over cooling of rooms can develop with the 12.5ºC air supply 3) It is well suited for larger buildings 4) The exterior wall convectors have increased heating capacity to compensate for the 12.5ºC air supply 5) For interior zones reheat coils are provided in the supply air duct |
It is well suited for larger buildings |
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For the selection of a HVAC system the building function factor includes: 1. Normal occupancy periods 2. Building owner’s considerations 3. The need to operate certain areas during off hours 4. Maintenance requirements 1) 2, 3 2) 1, 2 3) 3, 4 4) 1, 2, 3, 4 5) 1, 3 |
5) 1, 3 |
