## Fluid Mechanics and Hydraulic Machinery Miscellaneous

#### Fluid Mechanics and Hydraulic Machinery

1. Specific speed of a Kaplan turbine ranges between

1. NA

##### Correct Option: D

NA

1. Kaplan turbine is

1. NA

##### Correct Option: B

NA

1. If there are m physical quantities and n fundamental dimensions in a particular process, the number of non-dimensional parameters is

1. NA

##### Correct Option: C

NA

1. Match List-I with List-II and select the correct answer using the codes given below the lists:
 List-I List-II P. Curtis 1. Reaction steam turbine Q. Rateau 2. Gas turbine R. Kaplan 3. Velocity compounding S. Francis 4. Pressure compounding 5. Impulse water turbine 6. Axial turbine 7. Mixed flow turbine 8. Centrifugal pump

1. NA

##### Correct Option: B

NA

1. At a hydro electric power plant site, available head and flow rate are 24.5 m and 10.1 m3/s respectively. If the turbine to be installed is required to run at 4.0 revolution per second (rps) with an overall efficiency of 90%, the suitable type of turbine for this site is

1. Given: H = 24.5 m, Q = 10.1 m3 /s
N = 4 rev/s = 4 × 60 = 240 r.p.m.
η0 = 0.90
∴ Power generated P = ρgQH × 0.9
P = 1000 × 9.81 × 10.1 × 24.5 × 0.9
P = 2184.7 kW
Again ,

 Ns = N√P H5 / 4

 Ns = 240√2184.7 = 205.80 (24.5)5 / 4

51 < Ns < 255, hence turbine in Francis.

##### Correct Option: A

Given: H = 24.5 m, Q = 10.1 m3 /s
N = 4 rev/s = 4 × 60 = 240 r.p.m.
η0 = 0.90
∴ Power generated P = ρgQH × 0.9
P = 1000 × 9.81 × 10.1 × 24.5 × 0.9
P = 2184.7 kW
Again ,

 Ns = N√P H5 / 4

 Ns = 240√2184.7 = 205.80 (24.5)5 / 4

51 < Ns < 255, hence turbine in Francis.