問題一覧
1
When overheating a joint when brazing causes
distortion
2
Can you use two torches when brazing
yes
3
Water copper tube is designated by its nominal inside diameter
true
4
What is oxygen color
green/black
5
What is acetylene color
red
6
After fitting is clean and fluxed how long can u wait to soldered
do it asap
7
Amount of flux can apply to a fitting
thin layer
8
What temp should never expose a gas cylinder
above 125
9
Type of copper tube joints
flared, compressed, brazed, soldered
10
Type of copper for water tubes
K
11
Type of welding specify for med gas piping Type of welding specify for med gas piping
brazing
12
Can u secure a gas cylinder to electrical CONDUIT
No
13
why oil grease should be kept away from cylinder
fire/explosion
14
Danger signls to look for when inspection cylinder
leaks and cracks
15
Fluxes are what general groups
corrosive, non corrosive, mildly corrosive
16
List of materials can use when cleaning copper fitting and pipe
sand cloth, abrasive padding, special wire brush
17
When a flashback occurs which valve to closer first
oxygen
18
Primary purpose of flux
chemically clean pipe
19
When can u tell a solder joint has exact temperature
when solder melts
20
Most common sources of brazing and solder
oxy acetylene, air acetylene, air propane
21
The wall thickness of type k copper tube is
greater than that of Type Lor Туре М
22
The temperature range; soldering is done below 840°F and brazing is done above 840°F. T/F
True
23
Copper is a ferrous metal. T/F
False
24
Copper is a ferrous metal. T/F
False
25
Alloy is a material or substance made up of two or more elements, at least one of which is metal. T/F
true
26
When using an oxyacetylene torch the type of flame which should be used is:
neutral
27
What are the types of copper water tube?
k,l
28
It is recommended that flux be applied to copper tube as soon as possible after cleaning to cause reoxidation. t/F
False