The minimum size of weld for the thickness of thicker member up to 10 mm is

Explanation:

Minimum Weld Size for Thicker Member

For a thicker member with a thickness of up to 10 mm, the minimum weld size is determined according to standard welding codes and practices. The size of the weld is critical to ensure sufficient strength and proper bonding between the welded components.

• Why Minimum Weld Size is Important: It ensures that the weld can bear the stresses and provides structural integrity.

• Factors Affecting Weld Size: Material thickness, type of joint, and loading conditions.

Analyzing the Given Options

1. Option 1: 3 mm (Correct Answer)

   • This is the correct minimum size for a weld when the thickness of the thicker member is up to 10 mm.

   • The weld size is sufficient to ensure strength and prevent failure under standard conditions.

2. Option 2: 5 mm (Incorrect)

   • A 5 mm weld size is larger than necessary for a 10 mm thick member and may lead to waste of material and over-welding.

   • It is not the recommended size for this thickness.

3. Option 3: 6 mm (Incorrect)

   • A 6 mm weld size is too large for a member of 10 mm thickness.

   • Using an oversized weld can result in excessive heat input, which might weaken the joint.

4. Option 4: 8 mm (Incorrect)

   • An 8 mm weld size is excessively large for this application, leading to inefficiency and potential weld defects.