ITMC Welding Fundamentals 5

Question 1

What is the purpose of a backing strip (backing bar) used during butt joint welding?

Accepted Answer

To support the root pass and prevent burn-through on the first pass

Answer

A backing strip supports the molten weld pool on the root pass of a butt joint, preventing burn-through and helping achieve complete joint penetration.

Question 2

What is interpass temperature in multi-pass welding?

Accepted Answer

The maximum temperature of the weld zone between successive passes

Answer

Interpass temperature is the temperature of the weld joint measured before each subsequent pass is deposited, and must be controlled to avoid excessive heat buildup or unacceptable microstructural changes.

Question 3

Which FCAW variant does NOT require an external shielding gas supply?

Accepted Answer

FCAW-S (self-shielded flux-cored)

Answer

FCAW-S (self-shielded) electrodes contain flux compounds in the core that generate their own shielding gases and slag when burned, eliminating the need for external gas.

Question 4

A fillet weld callout reads '3/8' on the welding symbol. What does this dimension represent?

Accepted Answer

The leg size of the fillet weld

Answer

The number to the left of the fillet weld symbol represents the leg size of the fillet weld, which is the distance from the root to the toe along each face.

Question 5

What hazard is specifically associated with welding on galvanized (zinc-coated) steel?

Accepted Answer

Metal fume fever from zinc oxide fumes

Answer

Heating galvanized steel releases zinc oxide fumes that cause metal fume fever, a flu-like illness with chills, fever, and muscle aches.

(ITMC) Industrial Technology Maintenance Certification Practice Test

(ITMC) Industrial Technology Maintenance Certification Practice Test

ITMC Welding Fundamentals 5