For both Method A and Method B furnaces, the furnace shall be equipped with a fan with a capability to pull air through the furnace to expedite the test and to reduce the escape of smoke into the laboratory.

• A. Only for Method B
• B. It reduces heating
• C. True
• D. Only for Method A

Answer: (C)

Ventilation through the furnace is essential. Having a fan that pulls air through the furnace in both Method A and Method B creates a controlled airflow that speeds up the test and carries away smoke and fumes. This keeps the lab safer by reducing the chance that smoke escapes into the workspace, and it helps maintain consistent heating by providing steady air flow. So, the statement is true because this ventilation requirement applies to both methods, not just one. It’s not about reducing heating; it’s about expediting the test and containing smoke.