Question 220Steam Plants - 1st Asst/Chief
70% to passFusible plugs are installed in fire-tube boilers to _______________.
Aprovide a means of draining the boiler
Bwarn the engineer of low water level
Ccool the crown sheet at high firing rates
Dopen the burners' electrical firing circuits
AI Explanation
The correct answer is B) warn the engineer of low water level. Fusible plugs are installed in fire-tube boilers to melt and release steam if the water level drops dangerously low. This alerts the engineer that the water level is critically low, allowing them to take immediate action to prevent damage to the boiler. The other options are incorrect because: A) Draining the boiler is not the purpose of fusible plugs. C) Cooling the crown sheet is not the main function of fusible plugs. D) Fusible plugs do not open the burners' electrical firing circuits.
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