Match the following lists : List I (Specific speed (rpm)): P. 8·5 to 30 Q. 50 to 340 R. 255 to 860 List II (Type of turbine): 1. Francis turbine 2. Kaplan turbine 3. Pelton wheel turbine with single jet Select the correct answer using the code given below : P Q R

Match the following lists : List I (Specific speed (rpm)): P. 8·5 to 30 Q. 50… — Answer & Solution | Civexa

Fluid Mechanics & Hydraulics · Hydraulic Turbines

Hydraulic Turbines MCQ with answer and solution

Match the following lists :

List-I (Specific speed (rpm)	List-II (Type of turbine)
P.8·5 to 30	1.Francis turbine
Q.50 to 340	2.Kaplan turbine
R.255 to 860	3.Pelton wheel turbine with single jet

Select the correct answer using the code given below :

Solution

Concept

Specific speed ranges

Step-by-step solution

1. Pelton wheel (single jet): 8.5 to 30 → 3. 2. Francis turbine: 50 to 340 → 1. 3. Kaplan turbine: 255 to 860 → 2.

Explanation

Specific speed rises from impulse turbines (low) through Francis (medium) to Kaplan (high).

Why the other options are wrong

Other codes break the ascending order Pelton < Francis < Kaplan.

Shortcut

Pelton lowest, Kaplan highest.

Common mistake

Mixing Francis and Kaplan.

Correct answer: B) 3 1 2

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