BRAZING UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS COMPREHENSIVE STUDY GUIDE FULL SOLUTION.pdf

BRAZING UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
COMPREHENSIVE STUDY GUIDE FULL
SOLUTION

●● adjust to a carbonizing flame, from a neutral flame, by either;
_________ acetylene, or ________________ oxygen.
Answer: increase; decrease


●● a carburizing flame is used to perform ___________ operations.
Answer: silver brazing


●● the oxidizing flame is produced by burning an excess of ________.
Answer: oxygen


●● the inner cone of the oxidizing flame appears ____________ in
color.
Answer: purplish


●● a slightly oxidizing flame is used to perform __________________
operations
Answer: braze weld

, ●● a backfire is a momentarily burning back of the flame into the
_________ .
Answer: torch tip


●● in a flashback, the flame burns in or beyond the torch ___________.
Answer: mixing chamber


●● a back fire is characterized by loud ____________________.
Answer: snap


●● a flashback is usually accompanied by a _____________ sound.
Answer: hissing


●● when flashback occurs, immediately shut off the torch
______________ needle valve; the close the torch _____________
valve.
Answer: oxygen ; acetylene


●● if backfire persists every time the torch is lighted check for: _______
tip, _________________ greater than that recommended for the tip
______________, loose ________________, or dirt torch tip
________________.
Answer: overhead, gas, pressure, size