Hydraulics And Fluid Mechanics In Me - Study Mode

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[#31] The specific speed of turbine is defined as the speed of a unit

(A) Of such a size that it delivers unit discharge at unit head

(B) Of such a size that it delivers unit discharge at unit power

(C) Of such a size that it requires unit power per unit head

(D) Of such a size that it produces unit horse power with unit head

Correct Answer

(D) Of such a size that it produces unit horse power with unit head

[#32] The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece and H = Height of liquid above the mouthpiece)

(A) $$0.855{ ext{a}}sqrt {2{ ext{gH}}} $$

(B) $$1.855{ ext{aH}}sqrt {2{ ext{g}}} $$

(C) $$1.585{ ext{a}}sqrt {2{ ext{gH}}} $$

(D) $$5.85{ ext{aH}}sqrt {2{ ext{g}}} $$

Correct Answer

(A) $$0.855{ ext{a}}sqrt {2{ ext{gH}}} $$

[#33] When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece and H = Height of liquid above the mouthpiece)

(A) $$0.5{ ext{a}}sqrt {2{ ext{gH}}} $$

(B) $$0.707{ ext{a}}sqrt {2{ ext{gH}}} $$

(C) $$0.855{ ext{a}}sqrt {2{ ext{gH}}} $$

(D) $${ ext{a}}sqrt {2{ ext{gH}}} $$

Correct Answer

(A) $$0.5{ ext{a}}sqrt {2{ ext{gH}}} $$

[#34] A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

(A) Equal to

(B) Less than

(C) More than

(D) None of these

Correct Answer

(B) Less than

[#35] A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.

(A) Equal to

(B) Less than

(C) More than

(D) None of these

Correct Answer

(C) More than