Tankerman · Operations — Line Clearing
Clearing (blowing/draining) the transfer hose and lines after a transfer is done to:
- AAdd cargo to the tank
- BTest the alarms
- CInert the cargo tank
- DEmpty product from the hose before disconnecting to prevent a spill✓ Correct
Explanation
Before breaking the connection, the hose/line is drained or blown clear (into a tank, not overboard) so no liquid is trapped that would spill when the flanges are parted. Drip pans remain in place during disconnection.
Authority: 33 CFR 156; ISGOTT
Practice the full Tankerman bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Tankerman questions
- Operations — Line Clearing
After completing a transfer, cargo hoses and loading arms are drained/blown down before disconnecting in order to:
- Operations — Line Clearing
After transfer, blowing or pigging the cargo line clear is done to:
- Transfer — PIC
During a cargo transfer on a tank vessel, the Person-In-Charge (PIC) is primarily responsible for:
- Transfer — DOI
Before a transfer of oil or hazardous material begins, the PICs of the transferring and receiving facilities must complete and agree on a:
- Safety — Inert Gas
The purpose of an inert gas system on a tanker is to:
- Safety — Inert Gas
A cargo tank is generally considered properly inerted when the oxygen content is held at or below: