Which of the following is NOT a potential problem in furnace operation?

a. Quick start-up
b. Plugging of the process tubes
c. Positive pressure in the firebox
d. Uniform flame height and uniform process flame color


a. Incorrect. Poor flame distribution can cause overheating and tube failure.
b. Incorrect. Poor flame distribution can cause overheating and tube failure.
c. Incorrect. Poor flame distribution can cause overheating and tube failure.
d. Correct. Poor flame distribution can cause overheating and tube failure.

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