Question 136Steam Plants - 1st Asst/Chief
70% to passA boiler superheater safety valve is set to lift at 450 psi
A46 CFR) require that if there is a pressure drop of 10 psi
BA
C3102 kPa)
D455 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
Q221:The tube sheets installed in a fire-tube auxiliary boiler are normally connected... Q157:Under normal operating conditions, a drop in the steam temperature leaving an u... Q86:Assuming all burners are clean and the fuel oil is at the correct temperature, i... Q130:Coast Guard Regulations Q394:For a large main propulsion turbine, the most commonly used turbine thrust beari...
Ready to test your knowledge?
Take a Steam Plants - 1st Asst/Chief Practice ExamOfficial Resources