inspecstudy7

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:

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:

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?