What unique problems can arise in oil furnaces because oil is a liquid fuel?
What will be an ideal response?
The oil must be pressurized, atomized, and mixed with air for proper combustion. If any of these are not done properly, sooty combustion will be the result.
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Always plan the plotting scale prior to adding text or dimensions to the drawings because the scale affects the display size of each item.
Answer the following statement true (T) or false (F)
An electronic device that is often used to help overcome the problem of induced noise is the ____________________.
Fill in the blank(s) with the appropriate word(s).
Which of the following activate when the temperature exceeds a preset level?
a. Air sampling detectors b. Fixed-temperature heat detectors c. Addressable detectors d. Spot detectors
The solder most commonly used on low-pressure copper fittings is made from _____
A) 100% lead B) 50% tin/50% silver C) 95% tin/5% antimony D) 45% silver/25% zinc/30% copper