Practice Test Four Flashcards
What is the general use of a type B vent
Gas fired appliance
The B vent is
Double wall
When testing a GFCI receptacle that is not grounded, how will the receptacle respond:
Will trip a receptacle, but not by the tester
Where concrete is poured on earth to construct a floor, the minimum thickness of the concrete should be:
3 1/2”
How should Romex be supported in an attic
Secured every 4 1/2 feet
A/c unit has 3-ton capacity. What is the BTU/hour rating?
36,000
A new gas furnace has 2 pairs of rods running the length of the burners. They are:
Reducing oxides of nitrogen present in the atmosphere
APP and SBS are as follows
Are modified bitumen sheets used for BURs
What is the clearance for combustibles of a single wall furnace flue
6”
What was added to some higher efficiency furnaces after 1980
Two heat exchangers
If natural gas line is changed to LP you need
Smaller orifice
A GFCI located next to a sink is wired with 2 wires, no ground,and trips with the receptacle test button: this is
Acceptable
What is the name of the tool to hold stucco material when applying
Hawk or hod
The deeper the foundation, the more pressure is exerted on it.concrete walls need to be:
6” thick at 5’ and 8” thick at 7’
Concrete block walls need to be :
8” thick at 5’ and 12” thick at 7’
When did safety glass become standard in sliding glass doors?
1960’s
The most common problem with concrete wall insulation is?
Mixed with too much water
At what water pressure do you start to get concerned :
80 psi
When converting from natural gas to LP:
Need more combustion air
A dedicated circuit is not required in which area ?
Bedroom.
To extend the life of a water heater:
Change the anode rod
The difference between a split bus bar panel and a single busbar panel is :
A split busbar panel has more than one “main” disconnect
Mudjacking is :
Forcing,under pressure, a material that will raise a concrete product to provide proper pitch
What causes ice damming?
Inadequate insulation and ventilation
