Explosion welding is a solid state process. (True or false?)

Explosion welding is a solid state process.
 
  Indicate whether the statement is true or false

 Q. 2

The difference between vent sizing for natural draft appliances and fan assisted appliances is that
 
  A) Columns for fan assisted appliances list sizes for both vertical and horizontal installation
  B) Columns for fan assisted appliances list both a minimum and a maximum appliance capacity for each vent size
  C) Vents for fan assisted appliances are typically larger in diameter for the same BTU capacity
  D) Vents for fan assisted appliances are always the same size as the connector on the furnace

 Q. 3

The notch on acetylene fittings indicates left-hand threads.
 
  Indicate whether the statement is true or false