[D2L] 101K Flashcards
What part of soldering and brazing is abrasive cloth applied?
Before soldering and brazing
What tool is used to clean ridges and burrs left on copper pipe after cutting?
Pipe reamers
A hacksaw can be used to cut refrigeration lines.
T or F
True
When you are brazing or soldering what will you get in the habit of always having within easy reach
Fire extinguisher
What is the flare angle for refrigeration copper tube?
1) 30
2) 36
3) 45
4) B and C
45
Always store acetylene cylinders in on their side.
T or F
False
upright & secured
How many turns should an acetylene bottle’s valve stem be opened?
1/4 turn
Why is copper ideal for refrigeration and air conditioning?
1) weathers well
2) withstands limited abuse such as weather effects and being hit with debris
3) does not react negatively with halocarbon refrigerants
4) all of the above
all of the above
What negative affect does annealing copper pipe have?
Weakens the tube
ACR copper tube is dehydrated and slightly pressurized with nitrogen
T or F
True
What copper tubing has the thickest wall?
Type K
Iron pipe, black iron pipe, and steel pipe are all the same
T or F
True
What is the formula to calculate fitting allowance of black iron pipe?
Throw minus the thread engagement equals the fitting allowance
Fitting allowance = Throw - Thread engagment
What is the capillary gap with pipework?
The space between the pipe and the fitting
What type of filler material would you use to connect copper pipe to a steel fitting in a refrigeration system?
Silver alloy wire (Easy flow 45)
