What type of joints are used to install polythylene tubing for hydronic piping systems?

• Flanged

• Heat-fusion

• Compression

• Brazed

The maximum amount of fuel oil stored above ground or inside a building shall be ___ gallons.

• 500

• 700

• 740

• 660

Vent piping on oil tanks shall be not smaller than ___ - inch pipe.

Oil tank vent piping shall terminate outside of buildings at a point not less than ___ feet, measured vertically or horizontally, from any building opening.

Components of a solar thermal energy system that might be subjected to a vacuum during operation or shutdown shall be designed to withstand such a vacuum or shall be protected with ___.

What is BTU and abbreviation for and what is it?

For gas appliances installations using the two-permanent-openings methods for outdoor combustion air, one opening commencing within ___ inches of the top and one commencing within ___ inches of the bottom of the enclosure, shall be provided.

(Answer for both blanks is the same)

• 12

• 10

• 20

• 17

Fel gas piping installed across roof surfaces shall be elevated not less than ___ inches above the roof.

Where gas piping is located within a framing member and is less than ___ inches from the framing member face to which wall, ceiling or floor membranes will be attached, the piping shall be protected by shield plates.

• 1

• 2 1/2

• 1 1/2

• 1 3/4

What is the thinnest steal material that can be used to cover the area of concealed gas piping?

• No. 16 gage

• No. 14 gage

• No. 10 gage

• No. 20 gage