Question 136Steam Plants - 1st Asst/Chief70% to pass
A boiler superheater safety valve is set to lift at 450 psi
AI Explanation
The correct answer is A.
46 CFR (Code of Federal Regulations) requires that if there is a pressure drop of 10 psi in the superheater safety valve setting, the valve must be reset. In this case, with the superheater safety valve set to lift at 450 psi, a 10 psi pressure drop would require the valve to be reset to 440 psi.
The other options are incorrect because B is simply the letter A, C is a conversion to kPa which is not the relevant unit, and D is a higher pressure setting than the original 450 psi.
Related Questions
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