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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____ tolerances applied to dimensions mean that the dimensions may vary from a larger size (+) to a smaller size (-) than the basic dimension (nominal size).
A. Bilateral B. Multilateral C. Binary D. Variable
Most of the ultraviolet radiation arriving on earth from the sun is absorbed by
a. air. b. nitrogen. c. water vapor. d. ozone.
List the four parameters that are controlled in motion systems.
What will be an ideal response?
To ensure that molten metal is blown away from the cut, the A-CAC operator should set the air pressure
regulator to _____. a. the highest pressure possible b. 20 psig (1.38 bars) c. 150 psig (10.3 bars) d. the lowest pressure that will reliably do the job