What is a vacuum?
What will be an ideal response?
Any pressure below atmospheric pressure.
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A ____ section is a view that does not cut completely through the structure.
A. longitudinal B. dividing C. partial D. full
Completely describe the welds required to join piece A1 to piece A3?
Review drawing number 523409B0A and then answer the question.
Cluttered and unorganized sheets are hard to read and may cause costly mistakes.
Answer the following statement true (T) or false (F)
Why do gas furnace efficiencies jump from 80% to 90%?
A) Federal regulations do not allow the production of mid-efficiency furnaces B) The physics of combustion make it impossible to produce an 85% efficient furnace C) Efficiencies over 80% cause condensation but the flue gas is still too hot for PVC vent pipe until the efficiency reaches 90% D) The blower used with 85% furnaces cannot be used for air conditioning