Question 67 of 120

Why should you check the manhole covers and vents on a cargo tank for tight sealing before a trip?

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A loose or damaged seal can let liquid escape or air enter, affecting both safety and the load's integrity
Manhole covers are purely for access during loading and have no sealing function once the tank is closed up
They are only checked during scheduled annual maintenance
Sealing only matters for tanks carrying food-grade products

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Correct answer to question 67 (Tank Vehicles): A loose or damaged seal can let liquid escape or air enter, affecting both safety and the load's integrity

Why

A poorly sealed manhole cover or vent can allow the cargo to leak or contaminants to enter, so checking that these seals are tight and undamaged is part of a proper tank vehicle inspection.

Updated: November 2026

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Why should you check the manhole covers and vents on a cargo tank for tight sealing before a trip?

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