CONCRETE & PLUMBING
Identification- 10pts ( 2 pts.each)
Instructions: Select the correct answer and record your answer on the answer sheet.
Directions: Identify the following objects and select the most correct answer
1. Identify the object marked #1.
A. Fully Threaded Nipple
B. Nipple
C. Male to Male Bushing
D. Threaded Reducer
2. Identify the object marked #2.
A. ½ to ¾-Barbed Coupler
B. Reducing Bushing
C. ½ to ¾ Street Elbow
D. ½ to ¾ Male Adapter
3. Identify the object marked #3.
A. 1 ½" Sanitary Tee
B. 1 ½" Vee
C. 1 ½" Union
D. 1 ½" 45° Wye
4. Identify the object marked #4.
A. ½" Pivot Clamp
B. ¾" Straight Jacket Clamp
C. ½" Emergency Pipe Clamp
D. ½" Pipe Coupler
5. Identify the object marked #5.
A. ½" Female Adapter
B. Cap
C. ½" Male Adapter
D. ½" Union
Directions: Use the diagram of a concrete
feeding slab to answer the following questions.
6. How many cubic yards would one order to complete the slab?
Assume a 10% waste factor in your calculations.
A. 20.4 cu. yds.
B. 21.7 cu. yds.
C. 22.4 cu. yds.
D. 23.9 cu. yds.
7. Identify the Water: Cement Ratio one would use for the feeding slab?
A. 5 gal/sack
B. 6 gal/sack
C. 7gal/sack
D. None of the above
8. Use the table provided to determine the appropriate cement/ fine aggregate/ coarse aggregate ratio.
A. 1:1:2
B. 1:1 ¾: 2
C. 1:2 ¼: 3
D. 1:2 ¾: 4
Recommended Mixtures for Concrete
| Uses of concrete | Water(gal.) for 1 Sack Cement-Sand | Trial Batch 1 Sack Cement Plus | Space Trial Batch Fills (cu.ft.3) | Materials for 1 Cu.Yd.1~ | ||||||
| Dry | Damp | Wet | Very Wet | Sand (cu.ft.3) | Gravel (cu.ft.3) | Cement (sack) | Sand (cu.ft.3) | Gravel (cu.ft.3) | ||
| Acid-resistant, alkali-resistant;dairy, creamery floors... | 52 | 4¾ | 4½ | 4¼ | 1¾ | 2 | 3.38 | 8 | 14 | 16 |
| Medium wear; reinforced; watertight; floors, tanks, etc....... | 62 | 5½ | 5 | 4¼ | 2¼ | 3 | 4.32 | 6¼ | 14 | 19 |
| Medium wear, indoor, underground, no water pressure | 72 | 6¼ | 5½ | 4¾ | 2¾ | 4 | 5.4 | 5 | 14 | 20 |
| 1To convert
cu. ft. to cu.m., first convert the cu.ft. to cu.yds. by dividing by 27.
Then, convert the cu.yd. to cu.m. by multiplying by 0.76 follow this example:
1¾(ft.3)÷27=0.064(yd3) 1.75(ft.3)÷27=0.064(yd3) Then, 0.064(yd.3)x0.76=0.49(m.3)
2Called 5-, 6-, 7-gallon mixes, indicating that there are 5, 6, 7 gallons of water to each sack of cement, including the amount of water in the sand. |
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9. Which type of finish would one apply to the feeding slab?
Use Concrete Samples Provided.
A. Finish 9A
B. Finish 9B
C. Finish 9C
D. None of the above
10. Using the chart provided determine the approximate strength (psi) of the concrete for the feeding slab.
A. 2500 psi
B. 3500 psi
C. 4500 psi
D. 5500 psi
| Kind Of Job | Strength (psi) | Bags of Cement Per Yard | Gallons Water/ Bag of Cement |
| Severe Exposure | 4500 | 7 | 5 |
| Normal Exposure | 3500 | 6 | 6 |
| Mild Exposure | 2500 | 5 | 7 |
PLUMBING PRACTICUM
Skill: Sweat Solder copper tubing
Materials needed: Copper tubing with one end capped, coupler, copper tubing cutter, propane torch, striker, solder, flux, wet rag, and emery cloth.
Directions:
1. Secure a ½" copper coupler.
2. Cut the pipe so that it extends 1 ¼"
as indicated on the figure below.
3. Place the coupler on the tubing and
use the propane torch to sweat solder the coupler in place.
4. Place one of your name labels on the
pipe.
5. Hand the completed joint and this paper
to the contest official
PLUMBING\CONCRETE SCORECARD
Points
Possible Earned
1. Neatness, Appearance 5pts. ___
2. Passes 50 psi air test 6pts. ___
3. Correct length 7pts. ___
4. Safety 2pts. ___
Total from problem solving 30pts. ___
TOTAL PLUMBING\CONCRETE 50pts. ___