What is the function of an oil safety valve?
What will be an ideal response?
Some fuel oil systems are installed so that the oil tank is at a higher elevation than the furnace. This makes getting the fuel to the burner easier. Unfortunately, it also makes it possible for any leaks in between the tank and the pump to leak oil continuously, especially when the furnace is off. In a worst case scenario, an entire tank of oil can leak out. The purpose of the oil safety valve is to prevent line leaks from draining the tank and causing environmental damage.
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Instantaneous contacts change their positions immediately when the coil is energized and change back to their normal positions immediately when the coil is de-energized.
Answer the following statement true (T) or false (F)
What is the height of a prism with a base area of 1.25 square meter and a volume of 2.56 cubic meters?
Fill in the blank(s) with the appropriate word(s).
When installing some bearings a fish scale is used to:
a. help torque the nut properly b. measure the rolling resistance after it has been preloaded c. weigh the balls or rollers before they are installed d. weigh the torque wrench to make sure it's calibrated
What is often used as a weather-resistant material for above- and-below-grade construction?
A. slate shingles B. concrete block C. wood shake D. ceramic tile