Engmat Final Year

38 Questions | Total Attempts: 33

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Year Quizzes & Trivia

Engmat set 1If you can pass this means u got full marks


Questions and Answers
  • 1. 
      The oxyacetylene flame for silver soldering should be?
    • A. 

      Neutral

    • B. 

      Oxidising

    • C. 

      Carburising

  • 2. 
    In composite matrix, the direction perpendicular to the stress is called the?
    • A. 

      Weight

    • B. 

      Weft

    • C. 

      Warp

  • 3. 
    Which of the following additive will enhance the flow of material during processing? 
    • A. 

      Filler

    • B. 

      Plasticizer

    • C. 

      Lubricant

  • 4. 
    Through which material will magnetic lines of force pass the mostly readily? 
    • A. 

      Copper

    • B. 

      Iron

    • C. 

      Aluminum

  • 5. 
    Steel is a term given to: 
    • A. 

      Iron that contains a percentage of carbon in solution

    • B. 

      Iron that contains one or more elements in addition to carbon

    • C. 

      A metal that is predominantly made of iron.

  • 6. 
    The length of time that a catalyst resin will remain in a workable state is called the 
    • A. 

      Pot life

    • B. 

      Shell life

    • C. 

      Service life

  • 7. 
    Which element will accumulates at the grain boundaries of steel to cause a condition known as "hot short" ? 
    • A. 

      Phosphorus

    • B. 

      Silicon

    • C. 

      Sulfur

  • 8. 
    When an oxygen concentration cell forms, the electrolyte in a crevice: 
    • A. 

      Suffers a drop in oxygen content and the crevice bottom corrodes faster.

    • B. 

      Increases its oxygen content and the bottom of the crevice corrodes slower.

    • C. 

      Suffers a drop in oxygen content and the surface metal corrodes.

  • 9. 
    The rate of oxidation of metals is increased by: 
    • A. 

      Low temperatures.

    • B. 

      Dry climates.

    • C. 

      High temperatures

  • 10. 
    Carburizing and nitriding affect the metal's surface by adding? 
    • A. 

      Toughness

    • B. 

      Hardness

    • C. 

      Ductility

  • 11. 
    The pressure applied to a vacuum bagged repair is primarily supplied by: 
    • A. 

      Vacuum

    • B. 

      Atmosphere pressure

    • C. 

      A calking plate

  • 12. 
    When scarf cutting a composite laminate in preparation for a repair, the approximate ratio of repair depth to repair site diameter is between: 
    • A. 

      5:1 and 10:1

    • B. 

      10:1 and 20:1

    • C. 

      30:1 and 50:1

  • 13. 
    The AISI and SAE uses a four digit designation for steel, what does the first digit represents? 
    • A. 

      Percentage of alloying element

    • B. 

      Alloying element

    • C. 

      Percentage of iron

  • 14. 
    Corrosion caused by galvanic action is the result of 
    • A. 

      Excessive anodization

    • B. 

      Contact between two unlike metals

    • C. 

      Excessive etching

  • 15. 
    When copper and nickel are alloyed together, they form a: 
    • A. 

      Solid solution that cannot be precipitation hardened.

    • B. 

      Partially solid solution that can be precipitation hardened.

    • C. 

      Solid solution that can be precipitation hardened

  • 16. 
    In malleable cast iron, the carbon is in which of the following form?
    • A. 

      Flakes

    • B. 

      Carbide

    • C. 

      Spheroids

  • 17. 
    Which of the following statement is true of dezincification? 
    • A. 

      It happens when the alloy contains less than 10% zinc

    • B. 

      It happens when alloy is exposed to dry air

    • C. 

      It happens when the alloy is in a stagnant acidic aqueous environment

  • 18. 
    The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has 
    • A. 

      High permeability and low retentivity

    • B. 

      Low permeability and high retentivity

    • C. 

      High permeability and high retentivity

  • 19. 
    Which heat treating operation would be performed when the surface of the metal is changed chemically by a high carbide or nitride content? 
    • A. 

      Tempering

    • B. 

      Normalising

    • C. 

      Case hardening

  • 20. 
    Ductile cast iron is ductile because the carbon is in which of the following form? 
    • A. 

      Cementite

    • B. 

      Flake

    • C. 

      Spheroid

  • 21. 
    In composite matrix, the direction where the stress or load is applied is called the? 
    • A. 

      Weight

    • B. 

      Weft

    • C. 

      Warp

  • 22. 
    Dezincification happens in which of the following material? 
    • A. 

      Copper

    • B. 

      Brass

    • C. 

      Bronze

  • 23. 
    Elastomers are material that? 
    • A. 

      Can't be stretched as they will creep upon release of the force that caused the stretch

    • B. 

      May be stretched or elongated but will not return to their original condition upon release of the force producing the elongation

    • C. 

      May be repeatedly stretched or elongated and will return to their original condition upon release of the force producing the elongation

  • 24. 
    Alloys are 
    • A. 

      Elements

    • B. 

      Compounds

    • C. 

      Mixtures

  • 25. 
    Which of the following is NOT a process to convert iron to steel?
    • A. 

      Smelting furnace

    • B. 

      Electric furnace

    • C. 

      Bessemer converter