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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME - section-1
  1. Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in meters, and Hd = Delivery head in meters)

    2. A.

     wQHs
    B.

     wQHd
    C.

     wQ (Hs - Hd)
    D.

     wQ (Hs + Hd)

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  2. For starting an axial flow pump, its delivery valve should be

    3. A.

     Closed
    B.

     Open
    C.

     Depends on starting condition and flow desired
    D.

     Could be either open or closed

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  3. Maximum impulse will be developed in hydraulic ram when

    4. A.

     Waste valve closes suddenly
    B.

     Supply pipe is long
    C.

     Supply pipe is short
    D.

     Ram chamber is large

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  4. The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

    5. A.

     (waV/2g) × sin θ
    B.

     (waV/g) × sin θ
    C.

     (waV²/2g) × sin 2θ
    D.

     (waV²/g) × sin θ

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