Plumbing - Session 7 Part 1

21. A pipe which is properly connected on the fixture side of a trap which pipe vapors or foul air is removed is commonly known as:
    A. Circuit vent.
    B. Local venting pipe.
    C. Back vent pipe, used to relieve back pressure.
    D. Independent re-vent.

In order that a branch may be correctly termed a "dead end" it shall be terminated by a fitting not used to admit liquids or air to a pipe and at a developed length:

A. 5 ft. or more. B. Lees than 2 ft. C. 3 ft. or more. D. 2 ft. or more.

You are assigned to the inspection of a 10 story apartment house. On your fist inspection of the building you note that a particular waste pipe is run from a main stack to receive flow only from a group of fixtures on the second and fourth floors respectfully. As the inspector, you shall:

A. Rightly call this pipe a branch. B. Require the contractor to install the upper most fixture on this pipe without a vent. C. Require the contractor to pipe it as a separate waste stack. D. Allow the contractor to use yoke venting for the two groups of fixtures.

The size of copper tubing of other than iron pipe sizes relates to the

A. inside diameter. B. Outside diameter. C. The inside diameter plus the wall thickness at any end D. The inside diameter plus the average wall thickness of any length.

Which one of the following statements is correct:

A. Any line of storm water piping is known as a "leader". B. A local venting pipe is commonly used to prevent back siphonage in a drainage system in a building. C. A sub-house drainage system is one which is only used to receive flow from basement fixtures D. The waste from a sink (which does not receive fecal matter) may be tied into a soil line.

A fixture trap shall be so constructed without materially affecting the flow of sewage or waste water through the trap and yet prevents the passage of:

A. Air or foul gas through the fixture B. Silver eels thru the fixture. C. Sewage or waste water into the water supply system. D. Sewage or waste water from one fixture into an adjacent fixture.

Horizontal drainage piping shall be installed in a uniform alignment at uniform slope. The minimum of 1/4 inch per foot when the pipe diameter is:

A. 2" or less B. 2-1/2" or less C. 3" or less D. 4" or less.

Offsets either horizontal or vertical may be made with short sweeps when the diameter of the drainage piping is:

A. 2 inch or larger. B. 4 inch or larger. C. 3 inch or larger. D.2-1/2 inch or larger.

The maximum number of water closets permitted to discharge into a 3-inch branch soil line is:

A. 2 B. 4 C. 6 D. 8.

The maximum number of water closets permitted to discharge into a 3-inch branch soil line when the water closet is public (flushing greater than 1.6 gpf):

A. 1 B. 2 C. 3 D. 4.

The fixture unit value for a bathroom group containing a lavatory, bathtub, shower stall and a water closet (direct flushometer valve 1.6 gpf) in an apartment building 20 stories hight:

A. 4 B. 5 C. 6 D. 7.