Welding Metallurgy MCQ Questions and Answers

1.
Stainless steel is welded using

A. oxy-acetylene flame

B. oxy-hydrogen flame

C. arc welding

D. inert gas arc welding

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2.
The nature of submerged arc welding flux with basicity index of 0.5 is

A. neutral

B. basic

C. semi-basic

D. acidic

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3.
Lap joints are preferred over butt joints in soldering/brazing because

A. these are weaker in tension but stronger in shear

B. these are weaker in shear but stronger in tension

C. these are stronger in both shear and tension

D. the lap joints are easily made

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4.
For a good quality brazing, the molten filler alloy should have

A. low contact angle with the base metal

B. low density

C. high surface tension

D. high viscosity

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5.
Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
Assertion: In a pure metal weld, elastic modulus in the heat affected zone (HAZ) is the same as that in the base metal.
Reason: Coarse grained microstructure in the HAZ results in lower hardness.

A. Both [a] and [r] are true and [r] is the correct reason for [a]

B. Both [a] and [r] are true and [r] is not the correct reason for [a]

C. Both [a] and [r] are false

D. [a] is true but [r] is false

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6.
Preheating of steel plate during welding is required to

A. reduce the heat input

B. increase the heat input

C. increase the cooling rate

D. decrease the cooling rate

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7.
Which of the following is not a solid state welding process?

A. Friction stir welding

B. Ultrasonic welding

C. Explosive welding

D. Flux cored arc welding

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8.
Which one of the following welding processes uses a non-consumable electrode?

A. Gas tungsten arc welding

B. Gas metal arc welding

C. Submerged arc welding

D. Flux cored arc welding

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9.
A weldment consists of

A. fused part of the weld

B. fused part and the heat affected zone (HAZ)

C. fused part + HAZ + base metal

D. HAZ

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10.
Preheating prior to welding is done for the purpose of

A. decreasing cooling rate

B. facilitating fusion of high melting metals

C. preventing hot cracking

D. ensuring full penetration

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Welding Metallurgy MCQ Questions and Answers | Metallurgical Engineering

1. Stainless steel is welded using

Answer & Solution

2. The nature of submerged arc welding flux with basicity index of 0.5 is

Answer & Solution

3. Lap joints are preferred over butt joints in soldering/brazing because

Answer & Solution

4. For a good quality brazing, the molten filler alloy should have

Answer & Solution

5. Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion: In a pure metal weld, elastic modulus in the heat affected zone (HAZ) is the same as that in the base metal. Reason: Coarse grained microstructure in the HAZ results in lower hardness.

Answer & Solution

6. Preheating of steel plate during welding is required to

Answer & Solution

7. Which of the following is not a solid state welding process?

Answer & Solution

8. Which one of the following welding processes uses a non-consumable electrode?

Answer & Solution

9. A weldment consists of

Answer & Solution

10. Preheating prior to welding is done for the purpose of

Answer & Solution

1.
Stainless steel is welded using

2.
The nature of submerged arc welding flux with basicity index of 0.5 is

3.
Lap joints are preferred over butt joints in soldering/brazing because

4.
For a good quality brazing, the molten filler alloy should have

5.
Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
Assertion: In a pure metal weld, elastic modulus in the heat affected zone (HAZ) is the same as that in the base metal.
Reason: Coarse grained microstructure in the HAZ results in lower hardness.

6.
Preheating of steel plate during welding is required to

7.
Which of the following is not a solid state welding process?

8.
Which one of the following welding processes uses a non-consumable electrode?

9.
A weldment consists of

10.
Preheating prior to welding is done for the purpose of