Deck 3: Service and Repair: DWV Systems

Question 1

Which of the following is NOT commonly used to remove impediments from clogged drains?

A)plunger
B)camera equipment
C)closet auger
D)fish tape

Answer 1

B

Question 2

A common term used for cast iron piping is:

A)soil pipe
B)hub pipe
C)joining pipe
D)compression pipe

Answer 2

A

Question 3

Why was lead such a popular material to use for piping and shower pans?

A)prevented natural radiation from infiltrating drinking water
B)installation was easy and required little skill
C)it is impervious to moisture
D)all of the above

Answer 3

C

Question 4

When holes appear in old lead piping, the entire piping system should be replaced with new lead pipe.

Question 5

Which of the following commonly attracts tree roots?

A)leaking pipes
B)commercial drains
C)lead waste drains
D)none of the above

Question 6

What is a sink rod?

A)a flat sewer rod coil made of flat steel ribbon
B)cable-encased sleeve with a 90-degree bend
C)cup-shaped rubber device with a short handle
D)a relatively short cable used to clean lavatory or sink drains

Question 7

Drainage problems in residential systems are generally due to residents overtaxing the system, and the age of the structure.

Question 8

When servicing and repairing commercial drainage problems, it is important to:

A)be aware of possible toxic substances
B)diagnose the problem correctly prior to repair
C)obtain as much information as possible before using equipment
D)all of the above

Question 9

What are subsoil drains specifically designed for?

A)redirecting spilled sewage
B)recovering ground water from surrounding earth
C)draining commercial grease waste
D)draining medical waste

Question 10

A fish tape is a flat steel ribbon, available in various sizes, that is used to clear drains.

Question 11

Which of the following is an example of exfiltration?

A)contaminated drinking water
B)dirt and debris in pipes
C)sewage leak
D)soil flowing into failed lines

Question 12

Which of the following is an example of infiltration?

A)soil flowing into failed lines
B)leaky drainage pipes
C)broken water main
D)sewage leak

Question 13

Which of the following is NOT a type of plastic typically used in piping?

A)multi-acrylic bichloride
B)polyvinyl chloride
C)acrylonitrile butadiene styrene
D)coextruded composites

Question 14

Due to their use in the war effort, which piping materials were in short supply for the public during World War II?

A)copper
B)steel
C)cast iron
D)all of the above

Question 15

Which problem is most likely caused by random material failures or improper installation?

A)stoppages
B)grade errors
C)obstructions
D)fitting failures