December Quiz Answers By Pete Jung
1. To operate a central air-conditioner, an electric clothes dryer, and an
electric range, the ampacity of the service to the house should be
AT LEAST:
a. 100 amps at 120 volts
b. 125 amps at 120 volts
c. 60 amps at 240 volts
d. 100 amps at 240 volts
2. A floor joist in a crawl space has been cut where the toilet drain passes
through the floor. The joists are 2x6 spaced at 16" on center. The
inspector should recommend that:
a. The buyer monitor the floor. Floor systems such as this have redundant
framing and removal of one joist is insignificant.
b. A contractor should support the cut joist with new piers and posts from
below.
c. The cut joist should be headed off to adjacent framing members to
distribute the load.
d. A contractor be contacted to determine what is needed and make
repairs.
3. Most problems with concrete are caused at the time of installation. What
single factor causes the MOST problems?
a. The concrete has insufficient thickness.
b. Too much water is added to the mix.
c. Too much Portland cement is in the mix.
d. The wrong kind of sand is in the mix.
4. Brick chimneys on older properties with oil heat sometimes curve above
the roof line, with no visible cracks. Which is a possible cause of this
curving?
a. Settlement of the chimney footing
b. Expansion of mortar
c. Absence of a cricket flashing at the roof
d. Lack of a rain cap on the flue
5. Which set of building terms do NOT belong together?
a. Cripple, trimmer, purlin
b. Arch, header, lintel
c. Rafters, ceiling joists, trusses
d. Sheathing, flooring, decking