Misc Flashcards
Stairway should slope how many degrees?
34
Do not insulate around…
Recessed can lighting
Flow down
The GC must flow down the provisions in his contract with the owner to his subcontractors
To lift a 50 ton load
Use 1 inch diameter chain or wire rope sling
Minimum diameter bolt to connect wood beams
3/8 inch
The first thing you see when you look down into a floor drain?
Standing water
Minimum size of kitchen sink drain?
1 1/2 inch
A three phase sub panel has…
Three legs
A neutral wire should never be connected…
To a ground wire
Minimum size breaker for an electric hot water heater?
Minimum of 125% larger than the circuit. 25 to 30 AMPs
Rating of electrical wire used outside?
Underground service entrance (USE) or underground feeder (UF)
Gas hot water heater needs?
Double wall vent pipe
Grounds made of copper or steel last longer if…
They come in contact with the ground
In protected areas, closets…
More than 24 ft.² require a sprinkler
Define Ohm
A unit of electrical resistance
What’s the most common type of gas pipe?
Black steel
Clearance need it in front of electrical panel?
36”
Optimal difference in temperature from inside to outside?
18°
Minimum spacing for sewer drain line hangers is for…
Chlorinated polyvinyl chloride (CPVC)
The vent pipe does not…
Hold liquid
A plumbing cross connection exists when…
A non-potable water source is allowed to mix with a potable water source
Distance from GFI receptacle to bathtub?
6 feet
Wood rafters must bear…
One and a half inches on wood
Silcock vacuum breaker prevents?
Backflow into pipe
