Assertion (A) : With throttle governing of a steam turbine, the turbine power is reduced by reduction in the available heat drop together with decrease in the rate of steal flow.
Reason (R) : The pressure and the rate of steam flow are simultaneously decreased with the help of a throttle valve.
Option (A)
Both A and R are true and R is the correct explanation of A
Option (B)
Both A and R are true but R is NOT the correct explanation of A
A is true but R is false
A is false but R is true
Correct Option:
Question Solution:
Throttle governor reduces the pressure and in tern enthalpy drop for useful work. It also increases initial superheat and delays the dew point. These caused reduction in wetness in pressure stage and reduction in efficiency