CA C60 Welding Contractor Exam

CA C60 Welding Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• Which type of welding uses an electric arc to melt metals at the joint?
• Gas welding
• Resistance welding
• Arc welding
• Friction welding

Rationale: Arc welding uses an electric arc to melt metals and form the

weld.

• What is the main purpose of a welding flux?
• To provide fuel for welding
• To prevent oxidation of the weld
• To increase metal conductivity
• To cool the weld

Rationale: Flux protects the molten metal from atmospheric gases and

prevents oxidation.

• Which welding process uses a continuously fed wire electrode?
• TIG welding
• Stick welding
• MIG welding
• Oxy-acetylene welding 1 / 3

Rationale: MIG welding (Metal Inert Gas) uses a continuously fed wire

electrode.

• In TIG welding, which gas is typically used as a shielding gas?
• Oxygen
• Argon
• Carbon dioxide
• Nitrogen

Rationale: Argon is commonly used to shield the weld pool in TIG welding.

• Which welding position is designated as flat, horizontal, vertical, and

overhead?

• ISO positions
• ASTM positions
• AWS positions
• EN positions

Rationale: The American Welding Society (AWS) classifies welding

positions as flat, horizontal, vertical, and overhead.

• Which type of metal is most commonly welded using TIG welding?
• Cast iron
• Stainless steel and aluminum
• Lead
• Bronze

Rationale: TIG welding is suitable for thin metals like stainless steel and

aluminum.

• What is the primary hazard associated with welding?
• Hearing damage
• Chemical ingestion
• Burns and eye injury from UV radiation
• Radiation poisoning

Rationale: Welding produces intense UV light and sparks, which can cause

burns and eye injuries. 2 / 3

• Which of the following is an essential personal protective equipment

(PPE) for welders?

• Ear plugs only
• Gloves only
• Welding helmet, gloves, and protective clothing
• Safety shoes only

Rationale: Complete PPE is necessary to protect against burns, sparks, and

UV radiation.

• What is the recommended welding current type for mild steel in

shielded metal arc welding (SMAW)?

• DC negative
• AC positive
• DC positive
• DC alternating

Rationale: DC electrode positive is commonly used for mild steel in SMAW.

• Which of the following is a common defect in welding?
• Annealing
• Hardening
• Porosity
• Tempering

Rationale: Porosity occurs when gas pockets are trapped in the weld metal,

weakening it.

• In welding terminology, what does “spatter” refer to?
• Electrical short
• Small droplets of molten metal expelled from the weld
• Gas accumulation
• Incomplete fusion

Rationale: Spatter consists of molten metal droplets expelled during

welding.

• Which welding process is most suitable for joining thin

aluminum sheets?

• / 3