Quiz  /  Heating And Welding Class 10 MCQ Questions With Answers

  • 1. 
    Heating a metal before welding is called

  • proper heating
  • cheat welding
  • preheating
  • proper welding

  • 2. 
    Thermal stress relieving reduces the ___ in Steel?

  • Impurities
  • Weld ability
  • Residual stress
  • yield strength

  • 3. 
    A ____ test determines whether a steel has good welding qualities?

  • Fracture
  • Bend
  • oxyacetylene torch
  • Spark

  • 4. 
    Which of the following is not an important factor when heat treating

  • the rate the metal is cooled
  • the tempurature
  • the method used to heat the metal
  • material around the metal

  • 5. 
    Which result from an oxyacetylene torch test indicates that a metal is not suitable for welding

  • the metal gives off a lot of sparks
  • the weld pool is fluid and has good tension
  • non of the above

  • 6. 
    The purpose of annealing is to ____ a metal

  • clean
  • soften
  • harden
  • expand

  • 7. 
    Which of the following is NOT true about a steel that is quenched and tempered

  • has good strength
  • Has good hardness
  • It is brittle

  • 8. 
    Grain growth is a function of time and temperature. a higher temperature and a longer time will produce a larger grain size

  • true
  • false

  • 9. 
    What is elongation

  • the length a metal can stretch before breaking
  • how much a metal can stretch
  • changing the properties of the metal

  • 10. 
    A Spark test can be performed to determine the approximate ___ of a steel or cast iron.

  • breaking point
  • Carbon content
  • Melting point
  • yield strength

  • 11. 
    Adding nickel to steel increases the strength ductility and toughness of the steel

  • true
  • false

  • 12. 
    As the carbon content of steel increases the tensile strength first increases the decreases

  • true
  • false

  • 13. 
    Temp-indicating crayons can be used to identify the temperature of metals within one or two degrees

  • false
  • true

  • 14. 
    In an electric furnace an arc is struck between large carbon electrodes and the metal in the furnace

  • false
  • true

  • 15. 
    How much carbon does a medium steel contain?

  • .25%
  • .30% - .55%
  • .67% - .80%
  • .56% - .66%

  • 16. 
    Coke is Mostly

  • Carbon
  • Coal
  • Iron
  • Nickel

  • 17. 
    Raw incoming metal stock is usually marked by the receiving company to identify is composition

  • false
  • true

  • 18. 
    The critical point of a metal is the temperature ____

  • at which the metal melts
  • at which metals properties change
  • when the metal becomes unstable
  • At which a phase change or structural change occurs

  • 19. 
    Steel may be annealed to soften the metal, make it machinable, or relieve stress

  • true
  • false

  • 20. 
    Which of the following will produce the maximum hardness in a steel.

  • Leave it as welded
  • slowly cooling
  • heat to above the A3 and rapidly quench
  • thermal stress relieving

  • 21. 
    The liquidus temperature is the temperature at which a liquid metal becomes solid

  • false
  • true

  • 22. 
    Which of the following statements is NOT true of nonferrous metals

  • They have distinctive colors
  • They are Magnetic
  • they do not spark
  • They are soft

  • 23. 
    Ability to withstand a squeezing force

  • compressive strength
  • toughness
  • ductility
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