Question

Direction: The question consists of two statements, one labeled as 'Statement (I)’ and the other as 'Statement (II)’. Examine these two statements carefully and select the answer using the codes given below:

Statement (I): Reaction turbines are generally used for sites with high head and low flow.

Statement (II): Kaplan and Francis turbines are reaction turbines.
1. Both Statement (I) and Statement (I) are individually true and Statement (II) is the correct explanation of Statement (I)
2. Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)
3. Statement (I) is true but Statement (II) is false
4. Statement (I) is false but Statement (II) is true 

Answer 1

Correct Answer - Option 4 : Statement (I) is false but Statement (II) is true 

• Impulse turbines are used for high head sites and reaction turbines are used for low head low and high discharge sites. Hence, the statement (I) is false
• Both Kaplan and Francis turbines are reaction turbines. So, statement (II) is true
• Francis turbines are mixed flow turbines since water enters radially but leaves the turbine axially.
• Kaplan turbines are axial flow turbine since water enters axially and leaves the turbine axially

Hence, the statement (I) is false and statement (II) is true.