Question 36Steam Plants - 1st Asst/Chief
70% to passWhich of the following statements is true concerning boiler inspections?
AIf the thickness found as a result of gauging is less than original thickness, the boiler must be condemned.
BThe marine inspector may require any boiler to be drilled to determine its actual thickness any time its safety is in doubt.
CAt the first inspection for certification after a water-tube boiler has been installed for ten years, it shall be gauged by drilling to determine the actual extent of deterioration.
DAny user of a non-destructive testing device must demonstrate that results with an accuracy of plus or minus one percent are consistently obtainable.
AI Explanation
The correct answer is B. The marine inspector may require any boiler to be drilled to determine its actual thickness any time its safety is in doubt. This is correct because the regulations allow the marine inspector to require drilling of a boiler if they have any concerns about its safety, regardless of the boiler's age or previous inspections. The other options are incorrect - A is too strict, C is specific to a 10-year-old water-tube boiler, and D is about non-destructive testing which is not the main focus here.
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