When does relay‚Äö√Ñ√∂‚àö√ë‚àö¬•s 1 and 2 come into operation?#

When there is change in steam flow rate

When there are changes in steam pressure

When there is change in forced draught

When there is change in induced draught

When does relay‚Äö√Ñ√∂‚àö√ë‚àö¬•s 1 and 2 com

1.	When does relay‚Äö√Ñ√∂‚àö√ë‚àö¬•s 1 and 2 come into operation?#
A.	When there are changes in steam pressure
B.	When there is change in forced draught
C.	When there is change in steam flow rate
D.	When there is change in induced draught
Answer» C. When there is change in steam flow rate