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The neutral wire: a. serves only one function b. must be wired to ground bar c. provides means to ground d. returns 120v to ground
Ice forming on the A/C evaporator coil is caused by:
Not enough air
A 3 tab asphalt shingle installed on a 5/12 pitch roof should have a minimum of a. 6 nails b. 8 nails c. 4 nails d. 5 nails
In an electrical subpanel, the neutral wire must be: a. seperated from the ground b. isolated c. wired to ground d. both seperated from ground and isolated
Trusses: a. can be cut b. can never be cut c. have two bearing points
Mid-efficiency furnace: a. no draft diverter required b. needs spark ignition c. has pilot light only d. has 2 heat exchangers
What is the proper exposure for a 24" shake? a. 7" b. 12" c. 10" d. 8"
What is the proper exposure for an 18" wood shake? a. 6" b. 7 1/2" c. 10" d. 12"
Crossbridging on floor joists:
keeps joist from twisting
Wood shakes are most likely to wear and expose felt paper at: a. valley b. key way c. ridge and hip
Flat roof used as an observation deck. Plumbing must extend: a. 1' b. 4' c. 7' d. 8'
A properly constructed retaining wall should: a. be plumb b. use anchors that are horizontal c. be backfilled with gravel
An electrical panel with a split busbar: a. is illegal b. has more than one shutoff c. breaker above controls other breakers d. not grounded
Romex wiring can be used: a. outside b. in garage with proper heighth c. in the attic nailed to top of joist d. all of the above
Central air added to an existing furnace- what is required? a. more ductwork b. 2 speed fan c. smaller ductwork d. more registers
What is characteristic of knob and tube wiring? a. no ground b. newer wires c. run through conduit
Which type of electrical meter most likely indicates the largest service amperage? a. one with a round base b. one with a square base c. one with a rectangular base d. one without a base
What was added to furnaces in 1980 to increase their efficiency?
2 heat exchangers
home inspection exam study