987577
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Quiz von nixlourens, aktualisiert more than 1 year ago
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Erstellt von nixlourens
vor fast 10 Jahre
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Frage 1
Frage
When "Hydrogen Control" is specified for a manual metal arc welding project the electrode would normally be:
Antworten
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Cellulosic
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Iron Oxide
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Acid
-
Basic
Frage 2
Frage
When "Hydrogen Control" is specified for a manual metal arc welding project the electrode would normally be:
Antworten
-
Cellulosic
-
Iron Oxide
-
Acid
-
Basic
Frage 3
Frage
You would certainly recognize a hydrogen controlled flux electrode from its:
Antworten
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Colour
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Length
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Trade Name
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BS639/AWS Code Letter
Frage 4
Frage
You notice manual metal arc electrodes are being, stripped of flux, are being used as a filler metal wire for TIG welding. You would object because:
Antworten
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It is too expensive
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The wire would be too thick
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The metal composition may be wrong
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The wire is too short
Frage 5
Frage
For open site manual metal welding the following equipment is available. Which would you choose for safe site working?
Antworten
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Single operator transformer
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multi-operator transformer
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AC/DC composition power unit
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Diesel engine driven motor generator
Frage 6
Frage
In MMA welding what parameter is used for control of penetration into the base metal?
Antworten
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Voltage
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Welding speed
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iron powders in the coating
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Current
Frage 7
Frage
What type of characteristic is required for manual welding?
Antworten
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Constant voltage
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flat characteristic
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Drooping characteristic
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DC generator
Frage 8
Frage
The weld metal deposit for MMA electrodes achieves its mechanical strength through:
Antworten
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The core wire
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The flux coating
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Iron powders with the flux coating
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None of the above
Frage 9
Frage
What constituent is needed in the coating of an electrode to prevent the formation of porosity in the welding of a rimming steel?
Antworten
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Iron powders
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Calcium florid
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Silicon
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calcium carbonate
Frage 10
Frage
Cellulose electrodes are often used when welding the root pass of pipes in the field because:
Antworten
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Hydrogen control is needed
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There are iron powders in the electrode
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Higher arc voltage can be obtained
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Shorter arc length can be obtained
Frage 11
Frage
MMA electrodes can be grouped into three main types:
Antworten
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Basic, cellulose and rutile
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Neutral, cellulose and rutile
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None of the above
Frage 12
Frage
Movement of the arc in MMA welding by magnetic forces is called:
Antworten
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Arc deviation
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Arc misalignment
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Arc blow
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Arc eye
Frage 13
Frage
Which of the following coatings is associated with welding?
Antworten
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Rutile
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Cellulose
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Basic
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Oxodizing
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A,B,C
Frage 14
Frage
The voltage necessary to maintain an arc during metal arc welding is termed:
Antworten
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Main supply voltage
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arc current
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Arc Voltage
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Open circuit voltage
Frage 15
Frage
When MMA welding low carbon steel which electrode which electrode will give the greatest deposition rate?
Antworten
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Hydrogen controlled
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cellulose
-
rutile
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Iron powder
Frage 16
Frage
Hydrogen controlled electrodes were developed principally for:
Antworten
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The prevention of porosity
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The prevention of cracking
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The enhancement of arc voltage
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There ease of arc starting
Frage 17
Frage
A basic electrode would normally:
Antworten
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Have superior mechanical properties
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Require baking before use
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Not to be used on low carbon steels
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Both A and B
Frage 18
Frage
MMA welding of low alloy steels is more likely to be performed with:
Antworten
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Rutile electrodes
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Cellulose electrodes
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Iron powder electrodes
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Basic hydrogen controlled electrodes
Frage 19
Frage
When manual metal arc welding low carbon steel, which electrode covering will give the greatest degree of penetration?
Antworten
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Iron powder
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Rutile
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Cellulose
-
Low hydrogen
Frage 20
Frage
MMA welds made with damaged electrode coatings are subject to:
Antworten
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Porosity
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Undercut
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Excessive penetration
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Excessive bead hieght
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