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Refrigeration and Air Conditioning Technician
WELDING
Set 6
Set 6
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Q10349
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Which factor determines the current setting during welding?
A
Types of joint
B
Position of weld
C
Length of electrode
D
Diameter of electrode
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What is the fault if excess deposit of tiny metal globules formed on the job surface along weld?
A
Incomplete penetration
B
Slag inclusion
C
Blow hole
D
Spatters
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Why the acetylene gas is avoided with copper pipe lines or fittings in oxy-acetylene welding set?
A
Copper is expensive
B
Copper is not flexible hose
C
Copper and acetylene form explosive
D
Copper pipe consumes more acetylene
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Why the filler metal does not melt and flow into the joint in bronze welding of copper?
A
Excess use of flux
B
Due to excess of polished surface
C
Surface coated with oxides or oily material
D
Excessive heating of metal s surface
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What is the precautionary measure taken if flame snaps out and back fires?
A
Shut off both valve quickly and dip in water
B
Shut off oxygen first and acetylene next
C
Shut off acetylene first, oxygen next and dip in water
D
Shut off both valve, oxygen first and dip in water
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