Question

multiple choice. select the best answer.

1. extra - heavy steel pipe has

a. thicker walls than standard pipe
b. smaller id than standard pipe
c. the same od as standard pipe
d. all of these

1. galvanized pipe is coated with

a. zinc
b. paint
c. oil
d. galvanoleum

1. galvanized pipe may be hazardous when

a. used with acidic water
b. mixed with black pipe in the system
c. exposed to soil
d. cut with a torch or welded

1. pipe that is available in both flexible and rigid form is

a. steel
b. pvc
c. copper
d. none of these

1. the heaviest copper pipe is type

a. k
b. m
c. l
d. z

1. a kind of flexible pipe that is preferred for long runs of outdoor cold - water lines is

a. copper
b. pe
c. pvc
d. steel

1. green stain in a tub indicates

a. poor quality finish on the tub
b. reaction of water and steel
c. reaction of water and copper
d. reaction of water and plastic

1. faucets may drip or leak due to faulty

a. washers
b. packing
c. o rings
d. any of these

1. a common problem with toilet tanks and automatic livestock waterers is

a. incomplete shutoff
b. green stain
c. dripping
d. all of these

1. the easiest water or sewer system to install uses pipe made of

a. cast iron
b. copper
c. plastic
d. steel
b. matching. match the terms in column i with those in column ii.
column i

1. steel pipe
2. copper pipe
3. teflon tape
4. plastic pipe
5. id
6. elbows
7. tee and y
8. cap and plug
9. coupling and union
10. nipple

column ii
a. nominal pipe size
b. changes direction of single line
c. connect several pipes
d. used on steel pipe threads
e. connect similar pipe in line
f. short length of pipe
g. used to close pipe and fittings
h. connected by threading
i. connected by cementing
j. connected by soldering

Explanation:

1. Extra - heavy steel pipe has thicker walls than standard pipe, smaller ID than standard pipe and the same OD as standard pipe, so all options are correct.
2. Galvanized pipe is coated with zinc.
3. Galvanized pipe can be hazardous when cut with a torch or welded as it releases zinc fumes.
4. Copper pipe is available in both flexible and rigid forms.
5. The heaviest type of copper pipe is type K.
6. Polyethylene (PE) is a flexible pipe preferred for long - runs of outdoor cold - water lines.
7. Green stain in a tub is due to the reaction of water and copper.
8. Faulty washers, packing or O - rings can cause faucets to drip or leak.
9. Incomplete shutoff is a common problem with toilet tanks and automatic livestock waterers.
10. Plastic pipe is the easiest water or sewer system to install.

For the matching part:

1. Steel pipe - connected by threading (h)
2. Copper pipe - connected by soldering (j)
3. Teflon tape - used on steel pipe threads (d)
4. Plastic pipe - connected by cementing (i)
5. ID - nominal pipe size (a)
6. Elbows - changes direction of single line (b)
7. Tee and Y - connect several pipes (c)
8. Cap and plug - used to close pipe and fittings (g)
9. Coupling and union - connect similar pipe in line (e)
10. Nipple - short length of pipe (f)

Answer:

1. d. all of these
2. a. zinc
3. d. cut with a torch or welded
4. c. copper
5. a. K
6. b. PE
7. c. reaction of water and copper
8. d. any of these
9. a. incomplete shutoff
10. c. plastic

Matching:

1. h. connected by threading
2. j. connected by soldering
3. d. used on steel pipe threads
4. i. connected by cementing
5. a. nominal pipe size
6. b. changes direction of single line
7. c. connect several pipes
8. g. used to close pipe and fittings
9. e. connect similar pipe in line
10. f. short length of pipe