Welding mod 2 book 1

Oxyfuel cutting is best suited for use on

• steel alloys

• ferrous metals

• nonferrous metals

• stainless steel

The stream of high-pressure cutting oxygen 

that is directed from an oxyfuel torch causes the metal to instantaneously 

• solidify

• de-kerf

• magnetize

• oxidize

The recommended range of tinting for either the face shield or the safety glass lenses used during an oxyfuel cutting operation is

• 1 to 2

• 3 to 6

• 7 to 8

• 9 to 10

Most welding environment fires occur during 

• oxyfuel gas equipment transporting

• carbon arc welding activities

• oxyfuel gas welding or cutting

• acetylene tank installation

When preparing a tank or vessel that might 

have contained flammable materials to be cut with an oxyfuel cutting torch, the best approach is to

• fill it with water

• purge it with oxygen

• fill it with air

• purge it with acetylene

When pure oxygen is combined with a fuel 

gas, it produces a

• high-pressure jet of cutting oxygen

• non-explosive, non-flammable vapor

• colorless, odorless, and tasteless gas

• high-temperature flame for cutting

The most common size of oxygen cylinder 

used in oxyfuel cutting applications is 

• 85 cubic feet (2.4 cubic meters)

• 227 cubic feet (6.4 cubic meters)

• 350 cubic feet (9.9 cubic meters)

• 485 cubic feel (13.7 cubic meters) 

  
  

If an acetylene cylinder is found lying on its

• Contact the supplier for instructions

• Release a small amount of the gas to 

  atmosphere. 

  
  

• Stand it upright and wait at least one 

  hour

• Add a liquid stabilizer to the gas

The maximum hourly rate at which acety- 

lene gas can be withdrawn from a cylinder is

• 15 cubic feet
• 1/7 of the cylinder capacity
• 1/10 of the cylinder capacity
• 1/15 of the cylinder capacity

The fuel gas that burns with the lowest flame 

temperature is

• Propane
• Butane
• Acetylene
• propylene