Locating the Building Sewer and Building Drain

What is the purpose of a 'sleeve' in piping?

• To reinforce concrete

• To prevent pipes from being damaged by contact with concrete

• To provide a base for the application of exterior cladding

• To cover the exterior framing of a building.

In plumbing, the lowest point or the lowest inside surface of a channel, conduit, drain, pipe, or sewer pipe is known as the ________.

• Benchmark

• Invert elevation

• Rebar

• Sheathing

What is the purpose of using rebar in plumbing installations?

• To provide protection against movement

• To increase water flow

• To reduce installation time

• To enhance aesthetic appeal.

Fill in the blank: When verifying the layout for below-grade piping, you must locate all underground site utility lines. Use grade lines attached to _______ to establish the locations of the drains.

• rebar

• batter boards

• chalk lines

• sewer taps

What is the total length of the building drain shown in the house floor plan?

• 27'-9"

• 16'-9"

• 41 inches

• 100 feet

Fill in the blank: The minimum depth required for the sewer tap from the finished floor of the basement is ___ inches.

• 25

• 16

• 41

• 100

What is the importance of maintaining the proper grade in a plumbing system?

• It prevents blockages and ensures proper flow.

• It increases the cost of construction.

• It reduces the need for maintenance.

• It allows for larger pipe sizes.

Fill in the blank: According to the velocity table, a 4-inch pipe with a fall of 1/4 inch per foot has an approximate velocity of ____ ft/sec.

• 1.44

• 2.03

• 3.53

• 4.07

What is the purpose of a benchmark in construction?

• To measure temperature

• To serve as a reference point for elevation

• To calculate material costs

• To determine project duration

Fill in the blank: Grade is expressed as vertical fall in fractions of an inch per foot of horizontal run. For example, a grade of ¼ inch means that the line of pipe will fall ¼ inch for every foot of run. The fall is the total change in ______ for the length of pipe.

• distance

• elevation

• width

• temperature