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  • Question
  • The coefficient of hardness of stones used in road work should be greater than


  • Options
  • A. 10
  • B. 12
  • C. 15
  • D. 17.

  • Correct Answer
  • 17. 


  • Building Materials problems


    Search Results


    • 1. The term frog means

    • Options
    • A. an apparatus to lift the stone
    • B. a depression on a face of brick
    • C. vertical joint in a brick work
    • D. soaking brick in water.
    • Discuss
    • 2. Magnese steels

    • Options
    • A. are non-magnetic
    • B. possess high electrical resistance
    • C. possess low coefficient of expansion
    • D. are used for the manufacture of rails
    • E. all the above.
    • Discuss
    • 3. For high grade instruments the steel preferred to, is

    • Options
    • A. cast steel
    • B. bessemer steel
    • C. mild steel
    • D. whitworth compressed steel.
    • Discuss
    • 4. Bullet proof glass is made of thick glass sheet sandwiched by a layer of

    • Options
    • A. steel
    • B. stainless steel
    • C. high test plastic
    • D. chromium plate.
    • Discuss
    • 5. Slump test for concrete is carried out, to determine

    • Options
    • A. strength
    • B. durability
    • C. workability
    • D. water content.
    • Discuss
    • 6. Bitumen felt is used for

    • Options
    • A. water proofing
    • B. damp proofing
    • C. both (a) and (b)
    • D. neither (a) nor (b).
    • Discuss
    • 7. Chlorite, a green colour mineral is mainly derived from the decomposition of

    • Options
    • A. augite
    • B. biotite
    • C. horn blende
    • D. All of these.
    • Discuss
    • 8. Index number expressing the relative sizes of both coarse and fine aggregates, is called

    • Options
    • A. proportioning of aggregates
    • B. fineness modulus
    • C. grading of aggregates
    • D. none of these.
    • Discuss
    • 9. Lime stones are generally known as

    • Options
    • A. aqueous rocks
    • B. sedimentary rocks
    • C. stratified rocks
    • D. all the above.
    • Discuss
    • 10. Dorry's testing machine is used for

    • Options
    • A. crushing test of stone
    • B. hardness test of stone
    • C. impact test of stone
    • D. water absorption test.
    • Discuss


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