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Casting, Forming & Welding II MCQ

Q:

Which of the following is not an objective of annealing?

A) Softening of steel B) Hardening of steel
C) Increase ductility D) Relieve internal stress
 
Answer & Explanation Answer: B) Hardening of steel

Explanation: Among the many purposes of treating the steel through annealing is softening of steel, hardening of steel and relieving the internal stresses, but annealing is not used for hardening of the steel.

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552
Q:

Electrodes used in spot welding are made up of which material?

A) Only Copper B) Copper and tungsten
C) Copper and chromium D) Copper and aluminium
 
Answer & Explanation Answer: D) Copper and aluminium

Explanation: The electrodes that are employed in the spot welding are required to possess a high amount of electrical and thermal conductivity. Hence, they are primarily made up of copper or copper and tungsten or copper and chromium.

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474
Q:

Which of the following property is responsible for weld metal cracking?

A) Stress B) Strain
C) Temperature conditions D) Pressure conditions
 
Answer & Explanation Answer: A) Stress

Explanation: The stresses which get developed in welding during shrinkage are of importance. These stresses are considered to be an important factor which are responsible for the cracking that occurs in metal welds.

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428
Q:

Penetrants of which colour are not used?

A) Red B) Blue
C) Green D) Yellow
 
Answer & Explanation Answer: A) Red

Explanation: The application of penetrant is one of the steps of inspection of dye penetrant test. It is an important feature that one must take care of, that the penetrant used, must not be of red colour, as defects are identified using red colour.

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344
Q:

Die punch clearance is generally very critical for blanking as well as for punching operation.

A) True B) False
 
Answer & Explanation Answer: A) True

Explanation: Punching is basically a kind of shearing operation in which the required part is the sheet left out after making a punch hole in the metal sheet. This method is also known as contour shearing. Die punch clearance is generally very critical for blanking as well as for punching operation, as it maintains the kind of finish obtained on the final part.

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334
Q:

Which of the following is not included in weldability?

A) Ability of mechanical soundness B) Serviceability of joint
C) Strain relieving brittleness D) Metallurgical compatibility of metal
 
Answer & Explanation Answer: C) Strain relieving brittleness

Explanation: For the making of good fabricated composition of a structure, metal with good weldability gets readily welded. Weldability includes the ability of the metal or the alloy to be having soundness in its mechanical properties, metallurgical compatibility of metal and serviceability of joint.

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326
Q:

Combination die is a die which combines cutting and non-cutting actions in the blanking process.

A) True B) False
 
Answer & Explanation Answer: A) True

Explanation: In a combination die, the cutting action like blanking or punching is combined with the non-cutting actions like forming which may further include bending, drawing and extrusion process. More than one operation can be possible in single stroke with the help of combination dies, but the die is more applicable for two operations only.

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313
Q:

The distance from the center of arc to the tip of electrode is called what?

A) Arc distance B) Arc length
C) Arc crater D) Arc depth
 
Answer & Explanation Answer: B) Arc length

Explanation: The distance from the center of the arc to the tip of the electrode, right till the bottom of the crater is defined to be the arc length. The arc length is considered to be one of the most essential variable in welding process.

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