CONCRETE & PLUMBING

Identification- 10pts ( 2 pts.each)

1. The piece marked #1 is a:

a. check valve

b. gate valve

c. ball valve

d. pop-off valve

2. The piece marked #2 is a:

a. nipple

b. coupling

c. union

d. bushing

3. The piece marked #3 is a:

a. a 90 degree elbow

b. a 45 degree elbow

c. close nipple

d. a 90 degree street elbow

4. The concrete marked #4 has what type of finish applied to the surface?

a. a broom finish

b. a metal trowel finish

c. a wooden float finish

d. a concrete float finish

5 The tool marked #5 is a:

a. bull float

b. concrete finishing trowel

c. edging trowel

d. brick trowel

Concrete problem- 20 pts. (5 pts. Each)

Answer the following questions about this 8" thick, 25' diameter grain bin pad.

a. 11 cubic yards Use a 10% waste factor when making your calculations

b. 13.5 cubic yards

c. 20 cubic yards

d. 24.5 cubic yards

7. If two (2) layers of reinforcing wire mesh were used in the concrete, how many rolls of reinforcing wire must be ordered?

a. 1 rolls

b. 2 rolls

c. 3 rolls

d. 4 rolls

• Use the slump table on the last page of this activity sheet and equipment provided to evaluate the slump test. Where should (type of application) this concrete be placed?

a. Foundation/footings

b. Substructure walls

c. Heavy mass construction

d. Concrete beams

• Examine the aggregate provided. Note the patio block form that will be used. Which wire mesh is cut correctly to reinforce this patio block?

a. Wire mesh labeled 9a

b. Wire mesh labeled 9b

c. Wire mesh labeled 9c

d. Wire mesh labeled 9d

Plumbing Practicum

Skill: Sweat Solder copper tubing

Scenario:

You have been asked to cap a ½ copper pipe. After some looking, you cannot find a cap, but you have found a some tubing that was previously capped. Rather than chase off to town for a new 10 cent cap, you decide to use the "L" shaped fitting which was previously capped to cap the pipe.

Materials needed: copper tubing, ½ inch coupling, copper tubing, capped pipe, copper tubing

cutter, propane torch, striker, solder, flux, wet rag, and steel wool.

Directions:

1. Secure a ½ inch copper coupling and previously capped pipe.

2. Use the copper tubing cutter to remove the capped end of the previously capped pipe.

(Note illustration)

3. Cut the pipe so that it extends as indicated on the figure below.

4. Clean the fitting and pipes with flux.

5. Place the coupling on the tubing and use the propane torch to sweat solder the coupling and capped pipe in place.

6. Place one of your name labels on the pipe.

7. Hand the completed joint and this paper to the contest official.

Slump Table

Types of construction	Slump, Inches
	Maximum	Minimum
Foundation Walls & footings	4	2
caissons & substructure walls	3	1
reinforced slabs, beams	5	2
building columns	5	3
pavement	2	1
sidewalks, driveways	4	2
heavy mass construction	2	1