Safety Practices & Equipment Handling Flashcards

What is the correct way to check for gas leaks in oxy-fuel equipment connections?

Answer: Apply approved leak-detection solution or soapy water and look for bubbles

Approved leak-detection solution applied to fittings and hose connections will bubble at any leak point; open flames must never be used to detect gas leaks.

What is the recommended practice when welding overhead to protect against falling molten metal?

Answer: Wear leather sleeves, a leather cape, and ensure spatter guards are in place

Overhead welding requires full leather protection including cape and sleeves to shield against falling spatter and molten metal that gravity directs toward the welder.

What is the function of a regulator's pressure relief device on a compressed gas cylinder?

Answer: To vent excess pressure and prevent regulator damage if pressure exceeds safe limits

The pressure relief device (safety valve) on regulators protects against overpressure by venting gas if internal pressure exceeds the design threshold.

Which welding process poses the highest electrical shock hazard due to its open-circuit voltage?

Answer: TIG (GTAW) with high-frequency start

High-frequency TIG welders use high-voltage (up to several thousand volts) high-frequency current for arc starting, creating a significant electrical shock hazard if contacted.

Under OSHA rules, when must a local exhaust ventilation (LEV) system be used during welding?

Answer: When natural ventilation cannot maintain fume levels below the permissible exposure limit (PEL)

OSHA requires LEV when general ventilation is insufficient to keep airborne contaminants below PELs; the specific trigger is the measured or anticipated exposure level.

What does 'lockout/tagout' (LOTO) procedure accomplish before performing maintenance on welding equipment?

Answer: Isolates energy sources and prevents unexpected energization during maintenance

LOTO procedures under 29 CFR 1910.147 isolate electrical, pneumatic, and other energy sources so equipment cannot be accidentally energized while workers perform maintenance.

What is the primary reason welders should never use oxygen to purge pipelines or ventilate confined spaces?

Answer: Oxygen-enriched atmospheres dramatically lower the ignition point of materials, creating extreme fire/explosion hazard

Oxygen-enriched atmospheres (above 23.5%) make nearly all materials — including clothing and hair — ignite and burn explosively, creating an extremely dangerous fire and explosion risk.