In conventional impulse steam turbine designs, only two rows of

Question

Direction: Each of the next consists of two statements, one labeled as the ‘Assertion (A)’ and the other as Reason (R)’ You are to examine these two statements carefully and select the answers to these items using the codes given below:

Codes:

1.  Both A and R are individually true and R is the correct explanation of A
2. Bothe A and R are individually true but R is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true  

Assertion (A): In conventional impulse steam turbine designs, only two rows of moving blades are used in a Curtis stages.

Reason (R): As the number of rows of moving blades in a Curtis stage increases, the effectiveness of the later rows decreases.