Hydraulics And Fluid Mechanics In Me - Study Mode

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[#11] A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is

(A) 0.83

(B) 0.6

(C) 0.4

(D) 0.3

Correct Answer

(B) 0.6

[#12] An impulse turbine is used for

(A) Low head of water

(B) High head of water

(C) Medium head of water

(D) High discharge

Correct Answer

(B) High head of water

[#13] The power developed by a turbine is (where H = Head of water under which the turbine is working)

(A) Directly proportional to $${{ ext{H}}^{frac{1}{2}}}$$

(B) Inversely proportional to $${{ ext{H}}^{frac{1}{2}}}$$

(C) Directly proportional to $${{ ext{H}}^{frac{3}{2}}}$$

(D) Inversely proportional to $${{ ext{H}}^{frac{3}{2}}}$$

Correct Answer

(C) Directly proportional to $${{ ext{H}}^{frac{3}{2}}}$$

[#14] The flow ratio in case of Francis turbine varies from

(A) 0.15 to 0.3

(B) 0.4 to 0.5

(C) 0.6 to 0.9

(D) 1 to 1.5

Correct Answer

(A) 0.15 to 0.3

[#15] The speed ratio in case of Francis turbine varies from

(A) 0.15 to 0.3

(B) 0.4 to 0.5

(C) 0.6 to 0.9

(D) 1 to 1.5

Correct Answer

(C) 0.6 to 0.9