Question 139Steam Plants - 1st Asst/Chief70% to pass
After patching refractory with plastic firebrick, holes are poked in the patch on 1 1/2 inch centers in order to _______________.
AI Explanation
The correct answer is D) vent escaping moisture.
The holes are poked in the refractory patch on 1 1/2 inch centers to allow any moisture trapped in the refractory material to escape as steam during the heating process. This prevents the buildup of pressure within the patch, which could cause it to spall or crack. The other answer choices are incorrect because they do not directly address the need to vent moisture from the refractory patch.
Related Questions
#137 Which of the listed procedures is the most important factor to take into consideration when making repairs to the refractory surrounding the burner openings? #138 To assure a long service life for boiler refractory materials after installation, the most effective method is to _______________.#140 A furnace wall in which there are open spaces around the brick as a result of firebrick shrinkage is _______________.#141 Which of the listed refractory materials should be used for patching a burner front formed of plastic, castable, or tile? #142 When you are installing a new furnace floor in an oil fired boiler, the clearance between the firebricks should be large enough to _______________.