56. Specific speed of a Kaplan turbine ranges between
    

1. 1. 30 to 60
      

   
   
   

   2. 60 to 300
      

   
   
   

   3. 300 to 600
      

   
   
   

   4. 600 to 1000
      

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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57. Kaplan turbine is
    

1. 1. A high head mixed flow turbine
      

   
   
   

   2. A low head axial flow turbine
      

   
   
   

   3. An outward flow reaction turbine
      

   
   
   

   4. An impulse inward flow turbine

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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

1. 1. m + n
      

   
   
   

   2. m × n
      

   
   
   

   3. m – n
      

   
   
   

   4. m/n

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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59. 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. 1. P - 2 , Q - 1 , R - 1 , S - 6
      

   
   
   

   2. P - 3 , Q - 4 , R - 6 , S - 7
      

   
   
   

   3. P - 1 , Q - 3 , R - 1 , S - 5
      

   
   
   

   4. P - 3 , Q - 4 , R - 7 , S - 6

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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60. 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. 1. Francis
      

   
   
   

   2. Kaplan
      

   
   
   

   3. Pelton
      

   
   
   

   4. Propeller

   
   
   

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1. View Hint View Answer Discuss in Forum

   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 < N_s < 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 < N_s < 255, hence turbine in Francis.
   

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