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Mechanic Diesel
ARC AND GAS WELDING
Set 4
Set 4
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Q8575
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What is the purpose of annealing?
A
Improve hardness
B
Improve machinability
C
Improve brittleness
D
Improve weldability
Q8576
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What is the advantage of AC arc welding machine?
A
More initial cost
B
Freedom from arc blow
C
More maintenance cost
D
Un suitable for non ferrous metal
Q8577
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What is the advantage of using rectifier set in arc welding machine?
A
Suitable for all ferrous and non-ferrous
B
Initial cost is lower
C
Maintenance cost in less
D
Not special safety precaution required
Q8578
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Which machine can be used any where in the field for welding away from electric main supply?
A
Motor generator set
B
Engine generator set
C
AC arc welding machine
D
AC welding transformer with a rectifier
Q8579
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Which one of the following metals cannot be welded by AC welding machine?
A
Brass
B
Cast iron
C
Mild steel
D
High carbon steel
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