Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer

From 376 to 390 of 1033

Q. When the thicknesses of vanes are to be considered in the discharge of a turbine, what will be the area under consideration?

a. Pi*d – n*t

b. Pi*d – n*n*t

c. Pi*d – t*t

d. Pi*d *d– n*t

  • a. Pi*d – n*t

Q. means the angle made by absolute velocity with the tangent on the wheel is 90 degrees and the component of whirl velocity is zero.

a. Axial discharge

b. Tangential discharge

c. Turbulent discharge

d. Radial discharge

  • d. Radial discharge

Q. In a Francis turbine, degree of reaction lies between           

a. 0 and 1

b. 1 and 2

c. 0 and 0.5

d. 0.5 and 0.1

  • a. 0 and 1

Q. If the water flows from inwards to outwards, the turbine is known as                         

a. Tangential flow turbine

b. Turbulent low inward flow

c. Inward flow turbine

d. Outward flow turbine

  • d. Outward flow turbine

Q. In general, reaction turbines consist of which types of energies?

a. kinetic energy and potential energy

b. potential energy and pressure energy

c. kinetic energy and pressure energy

d. gravitational energy and potential energy

  • c. kinetic energy and pressure energy

Q. is a circular wheel on which a series of smooth, radial curved vanes are fixed.

a. Guide wheel

b. Runner

c. Casing

d. Draft tube

  • b. Runner

Q. Discharge in an outward flow reaction turbine                        

a. Increases

b. Decreases

c. Remains constant

d. Gradually decreases

  • a. Increases

Q. An outward radial reaction turbine has             

a. u1 < u2

b. u1 > u2

c. u1 = u2

d. u2 = u1 = 0

  • a. u1 < u2

Q. An outward flow reaction turbine,                

a. D1 > D2

b. D1 < D2

c. D1 = D2

d. D1 = D2 = 0

  • b. D1 < D2

Q. is ratio of pressure energy change inside runner to total energy change inside runner

a. Degree of reaction

b. Speed ratio

c. Flow ratio

d. Hydraulic efficiency

  • a. Degree of reaction

Q. Degree of reaction for impulse turbine

a. 0

b. 1

c. 2

d. 3

Q. Degree of reaction for reaction turbine is                         

a. 1- cot x /2(cot x –cot y )

b. 1+ cot x /2(cot x –cot y )

c. 1- cot x /2(cot x +cot y )

d. 1+ cot x /2(cot x +cot y )

  • a. 1- cot x /2(cot x –cot y )
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