Explain the purpose of the pressure relief valve.
What will be an ideal response?
?The American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Codes require that each hot water heating boiler have at least one officially rated pressure relief valve set to relieve at or below the maximum allowable working pressure of the low-pressure boiler. This would be 30 psig. This valve discharges excessive water when pressure is created by expansion. It also releases excessive pressure if there is a runaway overfiring emergency.
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When specifying an L-shape with unequal legs, the _______________ leg is always specified first.
Fill in the blank(s) with the appropriate word(s).
Why is it important that the same force be used when tightening nuts and bolts on compressors?
A) Gaskets can seat unevenly and leak. B) You may not always have Permagasket to help. C) Most compressor heads have only two bolts. D) It is easier to tighten evenly all the way around.
A ______ lists the amounts of vitamins and minerals, plus percentages of protein, fat, and fiber.
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT and advantage of FSO?
A. cost B. speed of installation C. reliable in all environments D. security