1) Non - consumable electrodes are made of
a. Carbon
b. Graphite
c. Either carbon or graphite
d. Same material as the metal pieces to be welded
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Answer
Explanation
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ANSWER: Either carbon or graphite
Explanation:
No explanation is available for this question!
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2) For a good weld,
a. Cross - section of the added metal should be small and oxidation should be minimum
b. Cross - section of the added metal should be small and oxidation should be maximum
c. Cross - section of the added metal should be large and oxidation should be minimum
d. Cross - section of the added metal should be large and oxidation should be maximum
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Answer
Explanation
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ANSWER: Cross - section of the added metal should be small and oxidation should be minimum
Explanation:
No explanation is available for this question!
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3) The advantage of rectifier type welding set is
a. Reduced no - load losses
b. Easy arc starting
c. Less hazardous
d. Both (a) and (b)
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Answer
Explanation
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ANSWER: Both (a) and (b)
Explanation:
No explanation is available for this question!
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4) The voltage - current characteristics of the arc welding must be
a. Exponentially rising
b. Drooping
c. Straight line
d. Parabolic
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Answer
Explanation
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ANSWER: Drooping
Explanation:
No explanation is available for this question!
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5) An ac timer circuit is used to control the number of cycles for which the power may be supplied to the weld. In this, the time required for the voltage to fall by a given amount is
a. Directly proportional to the resistor
b. Directly proportional to the capacity of the condenser
c. Directly proportional to the inductor
d. Only (a) and (b)
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Answer
Explanation
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ANSWER: Only (a) and (b)
Explanation:
No explanation is available for this question!
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6) Advantage of using electron beam welding is / are
a. Welds are clean
b. Absence of porosity
c. Distortion less
d. All of these
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Answer
Explanation
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ANSWER: All of these
Explanation:
No explanation is available for this question!
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7) In inert gas metal arc welding,
a. Argon is used for welding thin materials and helium is used for welding thick materials
b. Both argon and helium are used for welding thin materials
c. Both argon and helium are used for welding thick materials
d. Argon is used for welding thick materials and helium is used for welding thin materials
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Answer
Explanation
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ANSWER: Argon is used for welding thin materials and helium is used for welding thick materials
Explanation:
No explanation is available for this question!
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8) The electrodes used in carbon arc welding are made up of
a. Carbon
b. Graphite
c. Either carbon or graphite
d. Zinc
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Answer
Explanation
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ANSWER: Either carbon or graphite
Explanation:
No explanation is available for this question!
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9) In metal arc welding, the filler material required is
a. Iron
b. Copper
c. Aluminium
d. No filler is required
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Answer
Explanation
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ANSWER: No filler is required
Explanation:
No explanation is available for this question!
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10) Arc welding is also known as
a. Pressure welding
b. Plastic welding
c. Non - pressure welding
d. None of these
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Answer
Explanation
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ANSWER: Non - pressure welding
Explanation:
No explanation is available for this question!
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