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50 Cards in this Set
- Front
- Back
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Convert FU to litres for combined sewer sizing |
Under 260fu is 2360 litres, over 260fu is 9.1 litres per fu |
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Maximum height for a cleanout on a rainwater leader |
3 meters |
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Fu for an emergency floor drain |
0 FU |
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Minimum distance trap arm to not vent a floor drain |
450mm |
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Where does a cleanout need to be for each running trap |
Upstream and above running trap |
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Number of maximum heads for gang shower |
12 heads |
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Maximum number of shower heads for one drain |
6 heads |
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How far Must gang shower heads be apart from each other |
750mm or 30" |
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How long must a vertical standpipe for a laundry be |
Minimum 600mm and above the flood level rim |
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Does each rainwater leader need a clean out at the base |
Yes |
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What is the maximum vertical distance from the roof to the first 90 for a rainwater leader |
5 feet |
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What is the minimum horizontal offset for a rainwater leader |
5 feet |
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If you cannot offset a rainwater leader what must be installed |
Expansion joint |
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How many degrees of direction change must you install a clean out for a building drain |
Every 135 degrees |
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Over how many minutes of rainfall are leaders sized from |
15 minutes |
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Should you connect storm water drains to sanitary drains |
No, this can overload sewage processing plants |
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What fixture can connect to a storm water drain with a check valve |
Drinking fountains |
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What is the maximum distance a roof drain can be from the edge of the roof |
15 metres |
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What is the maximum distance roof drains can be from each other |
30 meters |
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Every how many square metres must you have a roof drain |
900 square metres |
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When determining the hydraulic load for a roof how would you size a vertical wall |
You would use half the area of the largest vertical wall |
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For a parapet roof what is the maximum height of scuppers to drain the water |
150mm |
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How many liters are there for each liter per second on continuous flow |
900 litres |
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What is the calorific value of natural gas |
1000 btu per cubic foot |
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What is the calorific value of propane |
2500 btu per cubic foot |
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What is the specific gravity of natural gas |
0.6 |
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What is the specific gravity of propane |
1.5 |
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What is the combustion air required for natural gas |
10 cubic feet |
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What is the combustion air required for propane |
24 cubic feet |
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What is the range of flammability for natural gas |
5-15% |
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What is the range of flammability for propane |
2.3-9.5% |
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What is the primary purpose of a heating system |
To provide comfort to individuals in the space |
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Are interior building walls considered for heat loss calculations |
No |
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What is the design temperature difference |
The indoor temperature minus the outdoor temperature |
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When doing heat loss calculations how close must your measurements be for a room dimensions |
Within 0.025 feet |
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What is heat loss caused by cool air from outside being drawn in through windows and cracks |
Infiltration losses |
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What is the heat loss through your ceiling called |
Transmission loss |
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What is heat loss through conduction through material when there's a difference of temperature |
Transmission loss |
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What is required to size a boiler |
The total net heat loss |
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What will happen to a boiler with an output too high for its application |
It will cycle frequently |
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Whose procedure should be followed for boiler startup |
The boiler manufacturer |
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How do you check for a gas leak |
Soapy water solution |
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What three elements are needed to size piping for hydronic systems |
The flow rate, temperature drop and pressure drop |
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What is the formula for calculating gallons per minute required |
Btu divided by temperature change multiplied by 500 Btu/(500xtemp change) |
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What do hydronic pump outputs need to size |
They need the required gallons per minute and the feet of head in order to size |
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What is an expansion handling device used for in hydronic systems |
They are used to freely expand and contract water as it heats up and cools down |
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Describe r value |
How many hours it will take for one BTU to be lost |
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Define U value |
How many BTUs are lost in one hour through a combination of materials |
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Define k value |
How many BTUs are lost in one hour through uniform material |
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How would you calculate total heat loss per hour |
U value x square feet x temperature change |
