Practice Test Three Flashcards
The hearth of a fireplace should extend in front ____ inches, if the opening is under 6’ and _____ inches if over 6’
16” and 20”
A chimney should generally be installed :
2’ higher than anything within 10’
Clay/concrete tile roofs should have how much overlap :
3”
A built up roof having a lap joint every 12” is a:
3ply
Wood shakes and shingles are best maintained by
Applying a quality waterproof sealer periodically
What is the appropriate insulation for a built-up roof:
Rigid
What is the term used to describe the act of enlarging/offsetting the chimney as it goes through the roof:
Corbeling
A crack in the bricks at the top of a doorway or window usually indicates
A short or rusted lintel
Resistance is measured in
Ohms
Romex is another name for what type of cable
NM
Current flow is measured in
Amperes
A non grounded receptacle within 6’ of water should be replaced with a
GFCI receptacle
GFCI upstream from receptacle
Single pole GFCI breaker
If the black wire or hot wire carries 10 amps,how much does the white or neutral wire carry:
Same as the black wire
When converting from natural gas to propane gas:
The orifice must be smaller
The devices used to provide ignition for oil and gas fired systems are
Pilot/electronic ignition and sensing devices
The purpose of the pressure relief valve in a hydronic heating system is:
To prevent pressure with the system from exceeding a pre-set limit of 30 psi
In a conventional heat pump, the most critical component is the:
Compressor
Tempered glass is safer than ordinary glass because :
It breaks into small rectangular pieces
A fireplace should not share a chimney flue with A.another fireplace B.a furnace C.another wood stove D. All above
D. All above
How do you determine if a shower door has safety glazing ?
Marked in the corner
Maximum length of a gas appliance connector to a dryer or range is:
6’
Plumbing vents should be ____ inches from a parapet wall, minimum ____ inches above the roof, and ____ feet from a window.
12”,6”,10’
The discharge from a water heater temperature pressure relief valve may
A.not run uphill
B.be the same diameter as the valve outlet
C.be copper,galvanized, PEX,or CPVC
D.all The above
D.All the above
The water In a trap
Forms a seal to block sewer gases
Too much slope in horizontal waste line can cause
Siphonage at the traps
For water to drain freely out of the house waste system, there must be adequate:
Venting
Walls and ceilings in an attached garage must
Form a fire separation from the house in most jurisdictions
Earthquakes-which of the following is not a structural concern
Brick siding
In a heat pump(heating mode) the evaporator is:
Outside
In a typical heat pump operating in the heat mode,the temperature differential at the air handler(supply vs return) should be about:
25-30F
Defects found in drywall can normally be associated with: A.moisture B.to few nails C.improper framing or use of wet wood D. All above
D.all the above
The anode rod in a water heater ?
Protects the tank from corrosion
Glass block is:
Not safety glazed
Substantial movement of a building can be explained by all of the following except
Missing lintels
Te maximum spacing between supports or horizontal insulated flex air ducts is
4’
A lintel is used in which part of a wall system
Wall opening
Which material is recommended for the repair of polyurethane Foam roofing:
Elastomeric caulk
