A. For storage of dry steam.
Q. What is the object of a safety valve on a boiler?
A. To relieve pressure.
Q. What is your duty with reference to it?
A. To raise it twice a day and see that it is in good order.
Q. What is the use of check valve on a boiler?
A. To prevent water from returning back into pump or injector which feeds the boiler.
Q. Do you think a man-hole in the shell on top of a boiler weakens it any?
A. Yes, to a certain extent.
Q. What effect has cold water on hot boiler plates?