- -  AGRICULTURE CORE CURRICULUM  - -
   
   (CLF2000) Advanced Core Cluster: AGRICULTURAL MECHANICS
   
      (CLF2300) Unit Title: ARC WELDING
   
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      (CLF2349) Topic: UNIT EXAM                               Year(s)
                                                                  1 / 2 / 3 /4
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    1. Which of the following is NOT a type of arc welding power supply?
   
       a. Rectifier
       b. Transformer
       c. Alternator
       d. Generator
   
    2. The purpose of the ground clamp is to:
   
   
   
   
    3. The flux of an electrode
   
       a. forms a gas
       b. creates slag
       c. forms a shield for the weld
       d. all of the above
   
    4. The best material to use for protective clothing, footwear, and
      gloves is
   
      a. nylon
      b. leather
      c. polypropylene
      d. dacron
   
    5. The darkest and most protective lens available for welding purposes 
      is
   
      a. Shade 5
      b. Shade 7
      c. Shade 14
      d. Shade 20
   
    6. The ground clamp should be attached to
   
      a. a non-conductive block of wood
      b. the project or worktable
      c. a properly grounded bolt mounted in the floor
      d. the electrode
    7. A weld with the proper amperage, voltage, and speed displays
   
      a. good penetration
      b. no undercut or overlay
      c. a smooth appearance
      d. all of the above
   
    8. When the voltage setting is too low, the weld 
   
      a. spatters and undercuts
      b. digs a deep crater
      c. leaves the weld puddle exposed to oxidizing air
      d. provides poor penetration with a high, narrow bead
   
    9. Fire extinguishers for welding areas should be suitable for
   
       a. Class A fires
       b. Class B fires
       c. Class C fires
       d. all of the above
   
   10. Distortion in metal can be controlled by
    
       a. welding slowly and carefully
       b. using a back step welding procedure to evenly distribute heat
       c. cool the metal often during welding
       d. all of the above
   
   11. What is a the tensile strength of an electrode marked E6013?
   
   
   12. What does the E represent on the electode labeled E6011?
   
   
   13. What do the third and fourth digits represent on an electode marked
       E7018?
   
   
   14. Acoording to the Department of Labor statistics, how many welders
       are employed in the American industry?
   
       a. 100,000
       b. 425,000
       c. 550,000
       d. 865,000
   
   15. Which of the following is NOT a nondestructive method of testing
       welds?
   
       a. Magna-flux
       b. Dye penetrants
       c. Specialized testing machines
       b. Tensile and shear test
   
   
   7/12/91 RRE/tf
   
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