Which of the following hazards can cause an explosion in the firebox?
A. Bypassing safety interlocks
B. Poor control of excess air and poor draft control
C. Failure to wear proper protective equipment
D. Opening furnace inspection ports when the firebox pressure is greater than atmospheric pressure
A. Correct. Bypassing safety interlocks can cause an explosion in the firebox.
B. Incorrect. Poor control of excess air and poor draft control do not cause an explosion in the firebox.
C. Incorrect. Failure to wear proper protective equipment does not cause an explosion in the firebox
D. Incorrect. Opening furnace inspection ports when the firebox pressure is greater than atmospheric pressure does not cause an explosion in the firebox.
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