Why do closed hydronic systems include pressure-relief valves, expansion tanks, and temperature and pressure limiting devices?
A) because water expands and contracts as its temperature changes
B) because the copper piping used in the system requires these measures
C) because freezing must be prevented and antifreeze may not be added
D) because building codes require certain controls on every system
A
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The _________ ___________ distributes the air/fuel mixture as evenly as possible to each cylinder of the engine.
Fill in the blank(s) with the appropriate word(s).
The ASME standard that governs dimensioning and tolerancing is:
a. ASME Y14.2 b. ASME Y14.3 c. ASME Y14.5 d. ASME Y14.6
Codes require non-potable systems to be identified by markings, tags, or other methods. Is there a requirement to identify the outlets?
What will be an ideal response?
What is the first thing a person should see when approaching your display?
a. Photos c. Graphs b. Headings d. Text descriptions