______ 1. The waste pipe should be installed ____mm slope per meter run
A. 10 C. 30
B. 20 D. 40
______ 2. According to provisions, building and plumbing code. Pipes must be fitted and tightly connected to avoid _______.
A. Damage C. Leakage
B. Clogging D. Siphoning
______ 3. The portion of the ____________ drainage system starts from the outer surface of the dwelling and terminates at the public sewer.
A. Curved C. Sloped
B. Horizontal D. Vertical
______ 4. It also serves as a manhole for cleaning.
A. Catch basin C. Sanitary drain
B. House drain D. Storm drain
______ 5. It is the part of the plumbing system which conveys rain or storm water into the street gutter.
A. Catch basin C. Sanitary drain
B. House drain D. Storm drain