- -  AGRICULTURAL CORE CURRICULUM - -

(CLF2000) Advanced Core Cluster: AGRICULTURAL MECHANICS

 (CLF2550)  Unit Title: PLUMBING

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 (CLF2599)  Topic: UNIT EXAM            Time                     Year(s)
                                        1 Hour                     3/4   
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NAME_____________________________________________

DATE_____________________________________________

PERIOD___________________________________________

Circle the best answer.

 1. Which of the following statements is correct?

    a. A street elbow has one male thread and one female thread.
    b. A bushing has two female threads.
    c. A reducer has one male thread and one female thread.
    d. A 90 degree elbow has two male threads.

 2. The most common way to identify size of pipe is by:

    a. Inside diameter
    b. Outside diameter
    c. Wall thickness
    d. Pressure tolerance

 3. The proper sequence for assembling PVC pipe is:

    a. Prime, cut, glue, assemble
    b. Cut, prime, assemble, glue
    c. Cut, prime, glue, assemble
    d. Cut, sand, glue, assemble

 4. Soft 50-50 solder is a combination of:

    a. Tin and lead
    b. Tin and zinc
    c. Gold and zinc
    d. Silver and zinc

 5. What type of threads are found on steel pipe fittings?

    a. Straight pipe threads
    b. Straight machine threads
    c. Hose threads
    d. Tapered pipe threads
 6. A valve used for water supply systems to prevent backflow of water is 
    the:

    a. Gate valve
    b. Globe valve
    c. Check valve
    d. Cock valve

 7. Which pipe fitting would be used to fasten the ends of pipes where 
    neither pipe can be turned? 

    a. Coupling
    b. Reducer
    c. Bushing
    d. Union

 8. Soldering flux is not essential when sweat soldering copper pipe.

    a. True
    b. False

 9. When threading steel pipe, the pipe should extend beyond the die at
    least 1/2 inch.

    a. True
    b. False

10. The standard length for steel pipe is:

    a. 10 feet
    b. 12 feet
    c. 15 feet
    d. 20 feet
    e. 21 feet

11. Bushing pipe fittings have:

    a. One male thread and one female thread
    b. Two male threads
    c. Two female threads

12. During the soldering process, the solder is distributed between surfaces 
    of the bare metals by:

    a. Capillary action
    b. Caterpillar action
    c. Pressure
    d. Osmosis

13. Soldering is a process of:

    a. Fusion
    b. Fission
    c. Adhesion
    d. Cohesion
14. Copper tubing can be joined by which of the following methods?

    a. Flare fittings
    b. Sweating
    c. Solvent welding
    d. Both a and b
    e. Both a and c

15. Steel pipe and copper pipe or tubing should never be connected directly 
    together because of:

    a. Electrolysis
    b. Hydration
    c. Hydrolysis
    d. Hydrocorrosion

16. Copper pipe is specified by its:

    a. Nominal outside diameter
    b. Actual outside diameter
    c. Nominal inside diameter
    d. Actual inside diameter

17. Suppose a pump is to be removed from a plumbing system. Which of the 
    following fittings allows the pump to be removed without disassembling 
    the entire system?

    a. Adaptor
    b. Bushing
    c. Union
    d. Coupling

18. Drain-Waste-Vent (DWV) plumbing systems may be constructed with which of 
    the following materials? (More than one answer can be circled)

    a. Copper
    b. ABS
    c. Cast Iron
    d. Clay

19. Which of the materials listed below are used to assure a leakproof
    joint on tapered pipe threads? (More than one answer can be circled.)

    a. Teflon tape
    b. PVC glue
    c. Pipe joint compound with virgin teflon
    d. Pipe dope

20. The primer used on PVC is to soften the plastic so the glue welds the two 
    joints together stronger.
 
    a. True
    b. False
21. Which of the following materials can be used for natural gas lines?
 
    a. Galvanized steel
    b. Copper
    c. ABS
    d. Black steel

22. Galvanized steel pipe can be used only for cold water systems.

    a. True
    b. False

23. All three types of plastic pipe can be joined to plastic fittings by 
    means of a special solvent cement (glue).

    a. True
    b. False

24. Plastic pipe can be cut with which of the following tools:

    a. Plastic pipe cutter
    b. Hacksaw
    c. Backsaw
    d. Tubing cutter
    e. All of the above

25. How many lengths of galvanized steel pipe do you need to order if you had 
    to cut 14 faucet risers which were each 3 foot long? (SHOW ALL YOUR 
    WORK!)












26. Having an air gap between the faucet and a sink basin full of water 
    prevents which of the following? (Include diagram of situation.)

    a. Basin overflow
    b. Back connections
    c. Cross connections (of clean and dirty water)
    d. Mixture of hot and cold water


7/10/91 JD/JD/tf


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