Hydraulics And Fluid Mechanics In Me - Practice Test

[#386] Which place in hydraulic turbine is most susceptible for cavitations?

(A) Inlet of draft rube

(B) Blade inlet

(C) Guide blade

(D) Penstock

Correct Answer

(A) Inlet of draft rube

[#387] Which of the following pump is successfully used for lifting water from deep wells?

(A) Centrifugal pump

(B) Reciprocating pump

(C) Jet pump

(D) Air lift pump

Correct Answer

(D) Air lift pump

[#388] Impulse turbine is generally fitted

(A) At the level of tail race

(B) Little above the tail race

(C) Slightly below the tail race

(D) About 2.5 m above the tail race to avoid cavitations

Correct Answer

(B) Little above the tail race

[#389] A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will

(A) Sink to bottom

(B) Float over fluid

(C) Partly immersed

(D) Be fully immersed with top surface at fluid surface

Correct Answer

(D) Be fully immersed with top surface at fluid surface

[#390] A tank of uniform cross-sectional area (A) containing liquid upto height (H 1 ) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H 1 to H 2 will be

(A) $$frac{{2{ ext{A}}sqrt {{{ ext{H}}_1}} }}{{{{ ext{C}}_{ ext{d}}} imes { ext{a}}sqrt {2{ ext{g}}} }}$$

(B) $$frac{{2{ ext{A}}sqrt {{{ ext{H}}_2}} }}{{{{ ext{C}}_{ ext{d}}} imes { ext{a}}sqrt {2{ ext{g}}} }}$$

(C) $$frac{{2{ ext{A}}left( {sqrt {{{ ext{H}}_1}} - sqrt {{{ ext{H}}_2}} } ight)}}{{{{ ext{C}}_{ ext{d}}} imes { ext{a}}sqrt {2{ ext{g}}} }}$$

(D) $$frac{{2{ ext{A}}left( {{ ext{H}}_1^{frac{3}{2}} - { ext{H}}_2^{frac{3}{2}}} ight)}}{{{{ ext{C}}_{ ext{d}}} imes { ext{a}}sqrt {2{ ext{g}}} }}$$

Correct Answer

(C) $$frac{{2{ ext{A}}left( {sqrt {{{ ext{H}}_1}} - sqrt {{{ ext{H}}_2}} } ight)}}{{{{ ext{C}}_{ ext{d}}} imes { ext{a}}sqrt {2{ ext{g}}} }}$$

Hydraulics And Fluid Mechanics In Me - Study Mode

[#386] Which place in hydraulic turbine is most susceptible for cavitations?

Correct Answer

[#387] Which of the following pump is successfully used for lifting water from deep wells?

Correct Answer

[#388] Impulse turbine is generally fitted

Correct Answer

[#389] A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will

Correct Answer

[#390] A tank of uniform cross-sectional area (A) containing liquid upto height (H 1 ) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H 1 to H 2 will be

Correct Answer