1) The electrodes used for projection welding are
a. Flat and smaller in diameter
b. Flat and larger in diameter
c. Round and smaller in diameter
d. Round and larger in diameter
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Answer
Explanation
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ANSWER: Flat and larger in diameter
Explanation:
No explanation is available for this question!
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2) Spot welding is used to weld metal pieces whose thickness
a. Should be greater than 12 mm
b. Lesser than 12 mm
c. Lies between 15 to 20 mm
d. Greater than 20 mm
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Answer
Explanation
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ANSWER: Lesser than 12 mm
Explanation:
No explanation is available for this question!
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3) In percussion welding, the heat is produced by a rapid discharge of stored electrical energy from
a. Capacitor
b. Inductor
c. Resistor
d. Transformer
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Answer
Explanation
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ANSWER: Capacitor
Explanation:
No explanation is available for this question!
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4) Seam welding is not used for the
a. Welding in tanks
b. Welding in transformers
c. Welding in air crafts
d. Welding alloys of copper
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Answer
Explanation
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ANSWER: Welding alloys of copper
Explanation:
No explanation is available for this question!
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5) Voltage required for butt welding is
a. 2 to 8 V
b. 8 to 15 V
c. 15 to 22 V
d. 22 to 30 V
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Answer
Explanation
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ANSWER: 2 to 8 V
Explanation:
No explanation is available for this question!
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6) For welding aluminium alloys, the electrodes used are
a. Hard drawn copper
b. Cadmium copper
c. Chromium copper
d. Tungsten copper
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Answer
Explanation
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ANSWER: Hard drawn copper
Explanation:
No explanation is available for this question!
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7) The heat required by the weld is produced due to the contact resistance between the two pieces and is
a. Directly proportional to the current
b. Directly proportional to the square of the current
c. Inversely proportional to the square of the current
d. Inversely proportional to the current
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Answer
Explanation
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ANSWER: Directly proportional to the square of the current
Explanation:
No explanation is available for this question!
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8) The fusion welding is also known as
a. Plastic welding
b. Pressure 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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9) The example of plastic welding is
a. Resistance welding
b. Gas welding
c. Arc welding
d. Thermit welding without pressure
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Answer
Explanation
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ANSWER: Resistance welding
Explanation:
No explanation is available for this question!
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10) After welding, the welded parts retain which properties of the metal?
a. Melting point
b. Density
c. Thermal conductivity
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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