Impulse staging is commonly employed in high pressure part and reaction staging

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): Impulse staging is commonly employed in high pressure part and reaction staging in intermediate low pressure parts of the steam turbine.

Reason (R): The tip leakage across moving blades is less in impulse staging as the pressure drop is small and there can be large pressure drop across fixed blades and nozzles.