During the welding process, either inert gas or active gas shields the weld from the atmosphere and prevents oxidation of the base metal.
Answer the following statement true (T) or false (F)
True
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Draw the detail of a typical flash cove base used with sheet vinyl floor covering.
What will be an ideal response?
____________________ is the supplementation of precipitation with water from another source in order to grow crops
Fill in the blank(s) with correct word
Which one of the following is not recommended?
A) not burning pesticide containers. B) transferring small amounts of leftover pesticides to smaller containers to save space in storage. C) wearing full protective clothing when mixing chemicals D) not using household preparations of chemicals used as pesticides.
The typical start up sequence for a hot surface ignition system is
A) Combustion blower, indoor blower, igniter, and gas valve all energized simultaneously B) Combustion blower energized, igniter energized and gas valve energized, flames sensed, indoor blower energized after time delay C) Combustion blower pre-purge, igniter energized after a delay, gas valve energized after a delay, flames sensed, indoor blower energized after time delay D) Gas valve and igniter energized, flames sensed, combustion blower and indoor blower energized after time delay