QuESTioNS ANd CoRRECT {VERiFiEd} ANSWERS NEWEST
uPdATE|ALREAdY gRAdEd A+.
What is a neutral flame? - SOLUTION-Equal parts oxygen and acetylene
What is a carburizing flame? - SOLUTION-A cooler flame used for light
brazing.
At what PSI does Acetylene become unstable? - CORRECT
ANSWER-15 psi
What do you use to light a torch? - SOLUTION-Cup
Striker
Why is it dangerous to use a lighter to light a torch? -
SOLUTION-The flame may travel back into the lighter and cause it to
explode.
, How far do you open the acetylene valve on the tank when brazing? -
SOLUTION-1/2 turn to a full turn
What is an alloy? - SOLUTION-Any substance made up of two or more
metals.
What did the Federal Safe Drinking Water Act do? - SOLUTION-It banned
solders containing more than 0.2% of lead in piping for use in potable
(drinking) water systems.
What is the most common solder used on low pressure applications
and water lines? - SOLUTION-95% tin/5% antimony
What is 50/50 tin/antimony alloy used for? - SOLUTIONSuitable for
low/non pressure applications. Provides limited strength. NOT
suitable for water lines.
Oxygen is supplied in cylinders at pressures of about
_______________ psig. - SOLUTION-2,000 psig
Acetylene cylinders are pressurized to about _______________ psig. -
SOLUTION-250 psig