Question 152Steam Plants - 1st Asst/Chief70% to pass
On a boiler safety valve, the blow down adjusting ring is locked in place by a _______________.
AI Explanation
The correct answer is C) set screw.
On a boiler safety valve, the blow down adjusting ring is locked in place by a set screw. This set screw is used to secure the adjusting ring and prevent unintended changes to the safety valve's blow down setting. The set screw provides a secure, positive locking mechanism to maintain the proper adjustment of the safety valve.
The other answer choices are incorrect because: A) a wire seal would not provide a secure, mechanical locking mechanism; B) a locknut is not typically used for this purpose; and D) a cotter pin is not the appropriate fastener for locking the adjusting ring in place.
Related Questions
#150 Which of the listed types of safety valves is shown in the illustration? Illustration SG-0018 #151 When excessive static boiler pressure has resulted in the initial lift of the valve disc, a huddling chamber safety valve will continue to lift open as a result of _______________.#153 On a steam vessel with two high pressure boilers, one suspects a superheater leak. How would you determine which boiler may be leaking and what would be the indication(s)? #154 Warping of superheater screen tubes can be caused by _______________.#155 An excessively high superheater temperature could be the result of _______________.