Virtual Labs

Principles of Gas Welding and Gas Cutting Processes

Gas used for underwater welding is

a: Acetylene Explanation

Explanation

b: Gasoline Explanation

Explanation

c: Hydrogen Explanation

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d: None Explanation

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Acetylene's chemical formula is

a: C₂H₂ Explanation

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b: C₄H₄ Explanation

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c: C₂H₆ Explanation

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d: C₂H₅OH Explanation

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What kind of reaction takes place during oxyacetylene cutting?

a: Endothermic Explanation

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b: Exothermic Explanation

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c: None Explanation

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d: Both (a) and (b) Explanation

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Which one of the following gases is complicated to store?

a: Oxygen Explanation

Explanation

b: Acetylene Explanation

Explanation

c: Both (a) and (b) Explanation

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d: None Explanation

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Which part of an oxy-acetylene flame has the highest temperature?

a: Innermost cone Explanation

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b: Outer cone Explanation

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c: Intermediate cone Explanation

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d: None of the above Explanation

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Stream of oxygen jet is required in

a: Gas cutting Explanation

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b: Gas welding Explanation

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c: Brazing Explanation

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d: None of the above Explanation

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Oxygen-rich flame is used to join

a: Carbon steels Explanation

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b: Copper alloys-brass,bronze Explanation

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c: Both (a) and (b) Explanation

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d: None of theabove Explanation

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The ratio of Acetylene to Oxygen, when neutral flame created is

a: 2:1 Explanation

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b: 1:2 Explanation

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c: 1:1 Explanation

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d: 3:1 Explanation

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Central aperture diameter of gas cutting torch varies with

a: Thickness of material Explanation

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b: Type of material Explanation

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c: Both (a) & (b) Explanation

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d: None Explanation

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Acetylene gas is stored in the cylinder by mixing with

a: Alcohol Explanation

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b: Acetone Explanation

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c: Acetic acid Explanation

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d: Folic acid Explanation

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Acetylene gas cylinder requires special precautions due to

a: High Pressure Explanation

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b: Flammability Explanation

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c: Toxicity Explanation

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d: All of the above Explanation

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Which of the following statements are incorrect about oxyacetylene cutting?

a: It uses an oxidizing flame to melt and burn through the metal Explanation

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b: An additional oxygen jet is used after preheating the flame. Explanation

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c: It can be used to cut various metals including steel and stainless steel. Explanation

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d: Proper ventilation is important to avoid inhaling harmful fumes. Explanation

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Which metal is not generally considered suitable for oxyacetylene cuting?

a: Low carbon steel Explanation

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b: high carbon steel Explanation

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c: Cast iron Explanation

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d: stainless steel Explanation

Explanation