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  1. Which of the following types of pumps can be used for concreting ?
    1. Piston operated.
    2. Pneumatically operated.
    3. Centrifugal operated, with straight blades.
    4. Screw type.

    2. A.
    1 and 3
    B.
    1 and 2
    C.
    1, 3 and 4
    D.
    2 and 4

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    Answer : Option B

    Explanation :

    No answer description available for this question. Let us discuss.

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