SOLDERING AND BRAZING CHAPTER 4
QUESTIONS AND ANSWERS
Any combination of metals will form an alloy . - ANSWER false
Flux should not be applied with your finger to the cleaned metal surface to be
soldered - ANSWER True
Heat has not effect on the rate of oxidation of metal . - ANSWER false
The use of self-cleaning fluxes is generally recommended when making
soldered joints - ANSWER false
Brazing fluxes are generally stronger than soldering fluxes - ANSWER True
Flux is not required when joining copper to cast copper alloy fitting by brazing -
ANSWER False
The strength of a braze copper tube joint does not vary much with the different
filler metals . - ANSWER True
Which of these general group are classification of fluxes? check all that apply? -
ANSWER High corrosive
Non - corrosive
Intermediate
What are three rules which should be observed when using the paste type
solders? check all that apply ? - ANSWER 1) wire solder should be added to
be join before soldering .
2) The mixture should be throughly stirred before using .
3) Don't depend on the flux to clean the tube .
A flux used for soldering and brazing must meet the requirement of ASTM
standard . - ANSWER ASTM standard B813
QUESTIONS AND ANSWERS
Any combination of metals will form an alloy . - ANSWER false
Flux should not be applied with your finger to the cleaned metal surface to be
soldered - ANSWER True
Heat has not effect on the rate of oxidation of metal . - ANSWER false
The use of self-cleaning fluxes is generally recommended when making
soldered joints - ANSWER false
Brazing fluxes are generally stronger than soldering fluxes - ANSWER True
Flux is not required when joining copper to cast copper alloy fitting by brazing -
ANSWER False
The strength of a braze copper tube joint does not vary much with the different
filler metals . - ANSWER True
Which of these general group are classification of fluxes? check all that apply? -
ANSWER High corrosive
Non - corrosive
Intermediate
What are three rules which should be observed when using the paste type
solders? check all that apply ? - ANSWER 1) wire solder should be added to
be join before soldering .
2) The mixture should be throughly stirred before using .
3) Don't depend on the flux to clean the tube .
A flux used for soldering and brazing must meet the requirement of ASTM
standard . - ANSWER ASTM standard B813
