Which table would you reference to determine Type IV holdover time when precipitation includes hail and snow pellets?

Which table would you reference to determine Type IV holdover time when precipitation includes hail and snow pellets?

• A. Allowance Times for Hail, Small Hail, Ice Pellets, Snow Grains and Snow Pellets
• B. Allowance Times for SAE Type IV fluids
• C. Type IV Holdover Chart
• D. Holdover Time Log

Answer: (A)

Holdover time for Type IV fluid varies with the type of precipitation, so you must reference the table that provides explicit allowance times for the specific precipitation forms involved. When hail and snow pellets are in the mix, the relevant values come from the table that lists allowance times for hail, small hail, ice pellets, snow grains and snow pellets. This table directly ties those precipitation types to the maximum time the Type IV fluid can still be relied on before protection decreases, making it the correct source for determining the holdover time in this scenario. Other references either cover the fluid category in a general sense without listing the specific hail/snow pellet categories, or are intended for record-keeping rather than providing the actual time allowances.

Holdover time for Type IV fluid varies with the type of precipitation, so you must reference the table that provides explicit allowance times for the specific precipitation forms involved. When hail and snow pellets are in the mix, the relevant values come from the table that lists allowance times for hail, small hail, ice pellets, snow grains and snow pellets. This table directly ties those precipitation types to the maximum time the Type IV fluid can still be relied on before protection decreases, making it the correct source for determining the holdover time in this scenario.

Other references either cover the fluid category in a general sense without listing the specific hail/snow pellet categories, or are intended for record-keeping rather than providing the actual time allowances.