Hydraulics And Fluid Mechanics In Me - Study Mode

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[#166] A fluid is said to be ideal, if it is

(A) Incompressible

(B) Viscous and incompressible

(C) Inviscous and compressible

(D) Inviscous and incompressible

Correct Answer

(D) Inviscous and incompressible

[#167] The dynamic viscosity of the liquid __________ with rise in temperature.

(A) Remain unaffected

(B) Increases

(C) Decreases

(D) None of these

Correct Answer

(C) Decreases

[#168] The dynamic viscosity of gases __________ with rise in temperature.

(A) Remain unaffected

(B) Increases

(C) Decreases

(D) None of these

Correct Answer

(B) Increases

[#169] The overall efficiency of a reaction turbine is the ratio of

(A) Power produced by the turbine to the energy actually supplied by the turbine

(B) Actual work available at the turbine to the energy imparted to the wheel

(C) Work-done on the wheel to the energy (or head of water) actually supplied to the turbine

(D) None of the above

Correct Answer

(A) Power produced by the turbine to the energy actually supplied by the turbine

[#170] The value of bulk modulus of a fluid is required to determine

(A) Reynold's number

(B) Froude's number

(C) Mach number

(D) Euler's number

Correct Answer

(C) Mach number