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CM 3201 - EXAM 2

Terms in this set (101)

Which dissolved mineral found at high levels in drinking water can cause a laxative effect to humans that have not adapted?

a. Nitrate
b. Manganese
c. Sulfate
d. Fluoride
e. None of these
Sulfate
What is the difference between a kitchen sink and a bathroom lavatory?

a. Kitchen sinks typically have scald guards, while bathroom lavatories do not have scald guards
b. A kitchen sink must have two basins, while a bathroom lavatory only has one basin
c. A kitchen sink has an overflow, while a bathroom lavatory does not have an overflow
d. A kitchen sink does not have an overflow, while a bathroom lavatory does have an overflow
e. None of these
A kitchen sink does not have an overflow, while a bathroom lavatory does have an overflow
When is a vacuum breaker used?

a. To prevent backflow when an air gap is not possible
b. None of these
c. To prevent sewer gases from backing up into a facility through the drainage pipes
d. To create pressure in a flushometer valve, which allows for instantaneous flushing of toilets and urinals within 5-10 secs after the initial flush
e. To prevent water hammer by absorbing the shock caused by quick closing valves
To prevent backflow when an air gap is not possible
Building codes require the use of building occupancy types to set the minimum number of plumbing fixtures needed.
True
Water purification is a process for removing dissolved solids in the domestic water supply
True
Swimming pools typically use a flow rate to re-circulate the entire volume of water in

a. 12 hours
b. None of these
c. 2 hours
d. 6 hours
e. 10 hours
6 hours
Why are water closets typically wall-mounted for commercial applications?

a. None of these
b. Easier for custodial crews to clean the bathroom floors
c. Installation is less expensive
d. Smaller WC drainpipes can be used
e. Less water is consumed
Easier for custodial crews to clean the bathroom floors
The preferred level of hardness is more than 500ppm of calcium carbonate.
False; the acceptable level of hardness is less than 220ppm of calcium carbonate
An upfeed system uses pumps and valves to move water up to large storage tanks.
False; a downfeed system uses pumps and valves to move water up to large storage tanks
Water hammer arrestors control movement of supply pipes due to the force of water flow interruption.
True
A preaction sprinkler system is the basic automatic sprinkler system for all building use groups.
False; a wet pipe system is the basic automatic sprinkler system for all building use groups.
Total wsfu and total dfu are typically equal for office buildings
False; the total wsfu and dfu can vary from one office to another
A proper sanitary drainage system can use 8 inch horizontal drainpipes that flow into a 6 inch vertical waste stack
False; The vertical waste stack has to always be at least the same size diameter, or larger, than the horizontal drainpipe diameter to avoid creating a pink point in the system
If venting is done improperly, a waste slug can develop, which can blow out or siphon the trap seal
True
An area drain is installed at an exterior location around a building, not over a building space
True
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