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