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Oxy-Fuel Welding & Gas Safety: Key Concepts and Procedures Exam #1 Question with verified answers

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Oxy-Fuel Welding & Gas Safety: Key Concepts and Procedures Exam #1 Question with verified answers

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2026/2027

Institution Welding

Course Welding

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Oxy-Fuel Welding & Gas Safety: Key Concepts and Procedures Exam #1 Question with verified answers

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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.

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Uploaded on: September 16, 2026
Number of pages: 3
Written in: 2026/2027
Type: Exam (elaborations)
Contains: Questions & answers

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