Oxy-Fuel Welding & Gas Safety: Key Concepts and
Procedures Exam #1 Question with verified answers
What percent of the air we breathe is oxygen? - √√Approximately 20%.
Is oxygen required to support any burning process? - √√Without oxygen, burning
cannot take place.
Oil or grease combined with oxygen may ignite or even explode without
__________? - √√The presence of flame.
What is the chemical symbol for acetylene? - √√C2H2.
What processes can acetylene be used for? - √√Welding, cutting, brazing, and
soldering.
What is the reserve volume of an acetylene cylinder at 70 degrees Fahrenheit? -
√√0% to 10%.
What is the maximum withdrawal rate for acetylene? - √√1/7 of cylinder contents
per hour.
Acetylene becomes unstable when compressed in its gaseous state above what
PSIG? - √√15 PSIG.
Are propane and natural gas both naturally colorless and odorless gases? -
√√True.
Procedures Exam #1 Question with verified answers
What percent of the air we breathe is oxygen? - √√Approximately 20%.
Is oxygen required to support any burning process? - √√Without oxygen, burning
cannot take place.
Oil or grease combined with oxygen may ignite or even explode without
__________? - √√The presence of flame.
What is the chemical symbol for acetylene? - √√C2H2.
What processes can acetylene be used for? - √√Welding, cutting, brazing, and
soldering.
What is the reserve volume of an acetylene cylinder at 70 degrees Fahrenheit? -
√√0% to 10%.
What is the maximum withdrawal rate for acetylene? - √√1/7 of cylinder contents
per hour.
Acetylene becomes unstable when compressed in its gaseous state above what
PSIG? - √√15 PSIG.
Are propane and natural gas both naturally colorless and odorless gases? -
√√True.
