WELDING - Set 6

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Refrigeration and Air Conditioning Technician
WELDING
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

Q10350

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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

Q10351

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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

Q10352

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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

Q10353

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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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