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
Slate or stone walkway?
On porous base
Cranes on commercial construction projects within 3 miles of an airport must…
Submit a request for approval 45 days before the project begins
Underground black steel pipe not used…
As a ground rod
Sway bar is used for?
To restrain the movement of pipe resulting from thermal expansion
What determines how a truss should be attached to a top plate?
Uplift force
How far must equipment be stored from an intersection?
20 feet
What’s the maximum spacing of fire extinguishers?
75 feet
Temperature prior to applying adhesive?
65°
Insulation value of housewrap?
Zero
Silt fence prevents?
0% of runoff
How often to replenish first aid kits?
Before each job and at least weekly
Dampen parged wall…
To cure the parging
What trade is most dependent on installation of metal studs?
Electrician
What holds faced batts in place in a wall?
Friction
The compressive strength of concrete should be at least 2000 PSI…
When using epoxy adhesive to install anchor bolts
Minimum thickness of reinforced foundation wall?
7 1/2 inches
Slope is…
Rise/Run