Explain about the process of welding and about welding symbols.
What will be an ideal response?
Welding is an old process that joins metal parts together. The finished welded part will then be able to withstand imposed loads. Many parts today are being fabricated manually or robotically using a welding process.
Complete welding and machining information is conveyed from a part designer to a welder, machinist, or a CNC programmer using graphic symbols. These symbols indicate the required type of weld, specific welding and machining dimensions, and other specifics required to fabricate a part. Standards are established for welding by the American Welding Society (AWS).
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What are some of the key characteristics that can be used to distinguish between an angiosperm and a gymnosperm?
What will be an ideal response?
The difference between codes and standards is:
A) Codes apply only to city and county building regulations. B) Codes apply to local municipal laws, and standards apply to state laws. C) Codes are enforceable by law, and standards are not. D) Codes and standards apply to equipment that is sold on international markets.
A high temperature differential (more than 2 degrees) between return air temperature at the grille and the return air temperature at the unit indicates:
A) Low refrigerant charge. B) Clogged liquid line. C) Return air leakage. D) Dirty evaporator coil.
Match the device with its description. Note: one description will not be used.
A. device that allows hot gas to flow to an auxiliary condenser B. precharged tubing C. a rotating component in an ice maker that scrapes the formed ice off the evaporator surface D. device that ensures the oil reservoir pressure is below the common suction pressure E. variable speed drives used to control compressor motor speeds