L05 - Residential Building Services and Interior Finishes Flashcards
Why are drains protected by traps
To prevent odours and sewer gases from entering house
True or False:
Traps are designed within each plumbing fixture to prevent odours and sewer gasses from entering the house.
True
Drains through walls have _______
P-traps
Drains through floors have ______
S-traps
P- or S-shaped bends in drain pipes called ___ are designed within each plumbing fixture to prevent odours an sewer gases from entering the house.
Trap
As discussed, the most appropriate solution for venting an island kitchen sink is…
an air admittance valve (AAV)
What is an alternative to discharging into soil stack
Gully trap
What do gully traps do?
Prevents foul air escaping drainage system
If drain pipes combined OR run to gully trap ____m+ fixture vent is required
3.5m+
True or False:
Gully traps can be used in lieu of a fixture vent only if it is at least 3.5m away from the fixture (eg. sink)
False
The primary treatment of wastewater in a private system involves a “ _” using anaerobic bacteria to break down any pathogens contained in the effluent.
septic tank
True or False:
The primary treatment of wastewater in a private system involves anaerobic bacteria to break down pathogens.
True
True or False:
The primary treatment of wastewater in a private system involves aerobic bacteria to break down pathogens.
False
True or False:
A drainage (leach) field can be used without a septic tank when sited in well-drained, sandy soil
False
A thickened internal wall containing a concentration of plumbing work is often called a “____ wall”.
wet
In the case of an overhead ‘service drop’, the conductors from a nearby power pole will connect to the house and form a “ “ which prevents water from entering the electrical equipment.
drip loop
True or False:
Overhead ‘service drops’ have drip loops to prevent water from entering the electrical equipment via the conductor.
True
A “_____” is a type of overcurrent devices that is physically destroyed when tripped
fuse
True or False:
Glass fibre batts is the most popular for insulating wall cavities in new construction
True
Popular option for attic spaces or wall cavities using a ‘binder’
(blown element)
Loose-fill
Which type of thermal insulation can be injected into wall cavities of uninsulated older homes?
Foamed in place
Which insulation is most appropriate to expose the timber roof framing within skillion roof (with cathedral ceiling)?
Rigid Board (polystyrene)
For stairs the ‘Proportional Step Rule’ equates to Twice Rise + Run = ___mm
600, 600mm
