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Building Materials - section-9
  1. Assertion A : Normally turpentine oil is recommended as thinner for indoor painting.
    Reason R : Turpentine oil is costlier than other thinners.
    Select your answer according to the coding system given below:

    2. A.

     Both A and R is true and R is the correct explanation of A
    B.

     Both A and R is true but R is not the correct explanation of A
    C.

     A is true but R is false
    D.

     A is false but R is true

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  2. Assertion A : Paints with white lead base are not recommended for painting of iron works.
    Reason R : Paints with white lead base do not check rusting of iron.
    Select your answer according to the coding system given below:

    3. A.

     Both A and R is true and, R is the correct explanation of A
    B.

     Both A and R is true but R is not the correct explanation of A
    C.

     A is true but R is false
    D.

     A is false but R is true

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  3. The stones obtained by blasting are used as

    4. A.

     Ballast in railways
    B.

     Aggregates for concrete
    C.

     Road metal
    D.

     All the above

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  4. Which of the following stresses is used for identifying the quality of structural steel?

    5. A.

     Ultimate stress
    B.

     Yield stress
    C.

     Proof stress
    D.

     None of the above

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  5. Sea sand used in structures causes

    6. A.

     Dampness
    B.

     Efflorescence
    C.

     Disintegration
    D.

     All of these

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  6. Cross cut saw is used for

    7. A.

     Cutting soft stones
    B.

     Cutting hard stones
    C.

     Cutting large blocks of stones
    D.

     Dressing stones

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  7. Wrought iron contains carbon upto

    8. A.

     0.25 %
    B.

     1.0 %
    C.

     1.5 %
    D.

     2.0 %

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  8. Which of the following sedimentary rocks changes into quartzite by metamorphic action?

    9. A.

     Sand stone
    B.

     Lime stone
    C.

     Shale
    D.

     Gypsum

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  9. Non acid-resistant asbestos is:

    10. A.

     Tremolite asbestos
    B.

     Chrysotile asbestos
    C.

     Amosite asbestos
    D.

     None of these

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  10. Bitumen completely dissolves in

    11. A.

     Carbon bisulphide
    B.

     Chloroform
    C.

     Coal tar
    D.

     All of these

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