Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
A gas pocket or weld cavity caused by gas or moisture trapped in a weld is called a A. Blowhole B. Crack C. Crater D. Root crack |
A. Blowhole |
|
|
A reducing flame is one which is rich in A. Oxygen B. Acetylene C. Nitrogen D. Argon |
B. Acetylene |
|
|
To cut stainless steel neatly with an oxyacetylene torch, what must be used? A. An oxygen rich flame B. A plasma torch C. A waster plate of ordinary low carbon steel D. Excess heat |
C. A waster plate of ordinary low carbon steel |
|
|
The pressure in a fully charged oxygen cylinder is about _______ kPa A. 15400 B. 22500 C. 6500 D. 3300 |
A. 15400 |
|
|
The normal acetylene and oxygen pressures for cutting steel plate are ________ and _______ kPa, respectively. A. 20, 280 B. 10, 150 C. 8, 100 D. 35, 425 |
A. 20, 280 |
|
|
The undercut is a groove melted into the plate at the toe or side of a weld. T or F |
True |
|
|
A neutral flame is rich in oxygen but not acetylene T or F |
False |
|
|
At what temperature will iron or steel burn, when it is brought into contact with oxygen? A. 1280°C B. 780°C C. 470°C D. 870°C |
D. 870°C |
|
|
Slugging is a term that refers to: A) Solid non-metallic material trapped in the weld B) Creation of a gas pocket by gas or moisture C) Metal particles being sprayed out during the welding process D) Adding pieces of unspecified rod or metal as a filler during the weld E) Stresses built up in a structure as a result of welding
|
D) Adding pieces of unspecified rod or metal as a filler during the weld |
|
|
Flux is: A) The unspecified pieces of scrap metal added to a weld to speed up the process B) The metal added as filler to a weld area C) A grouping of gas pockets together in a weld D) A granular substance deposited with the weld E) A gas flame that is neither rich in oxygen or acetylene
|
D) A granular substance deposited with the weld |
|
|
“Coalescence” is: A) The same as fusion B) The mixing of gases in a cutting torch C) A type of coating used on a welding rod D) A term used in soldering E) A term used in brazing
|
A) The same as fusion |
|
|
Acetylene hose connections have: A) Quick couplers B) Slip on connections C) No threads D) Left hand threads E) Right hand threads
|
D) Left hand threads |
|
|
When acetylene is stored in a cylinder it is absorbed in: A) Water B) Chromate C) Acetone D) Acetate E) Phosphate
|
C) Acetone |
|
|
Acetylene should not be used at pressures above: A) 25 kPa B) 120 kPa C) 10 kPa D) 103 kPa E) 50 kPa
|
D) 103 kPa |
|
|
Why should oxygen containers not be stored with oil and grease supplies? A) Because the danger of spontaneous combustion is increased B) Because oil and grease may corrode the threaded connections C) Because oil and grease make the oxygen cylinders slippery to handle D) Because oxygen reduces the lubricating qualities of the oil and grease E) Because oil and grease deteriorate the metal covering of the oxygen hoses
|
A) Because the danger of spontaneous combustion is increased |
|
|
When a weld pass is made to deposit a backing weld behind the root pass, it is termed: A) The axis of the weld B) A backing pass C) Boxing D) The plug weld E) The lead angle
|
B) A backing pass |
|
|
Slag inclusion results from: A) Adding pieces of rod or metal as filler to the weld B) Solid non-metallic materials being trapped in the weld C) Metal particles being sprayed out during the weld process D) Creation of a gas pocket due to trapped gases E) Stresses built up after the weld process |
B) Solid non-metallic materials being trapped in the weld |
|
|
When “plastic state” and “pressure” are terms used to describe a type of weld, it is: A) Electric arc welding B) Submerged arc welding C) Oxy-acetylene welding D) Resistance welding E) Forge welding |
E) Forge welding |
