Question 105Steam Plants - Assistant Engineer70% to pass
A hole should be made in the sagged tube occurring in a water-tube boiler, prior to plugging the tube to prevent a _______________.
AI Explanation
The correct answer is B) pressure buildup in the tube.
When a water-tube boiler tube becomes sagged, a hole should be made in the tube prior to plugging it. This is done to prevent pressure buildup in the tube, which could lead to a catastrophic failure. If the tube is simply plugged without the relief hole, pressure could build up behind the plug, potentially causing the tube to rupture. The other answer choices are incorrect because they do not address the primary concern of pressure buildup, which is the key reason for making the relief hole.
Related Questions
#103 Which of the following repairs should be made to a badly warped boiler tube? #104 The correct method of expanding a generating tube at the boiler drum tube sheet is to roll _______________.#106 If the engineer on watch has reason to doubt the accuracy of the water level showing in the boiler gage glass, he should FIRST _______________.#107 An obstruction in the top connection of a boiler gage glass will cause the _______________.#108 Which of the following actions, if any, should be taken if the water gage glass on a steaming boiler breaks?