Open ullage holes in tanks which are not gas-free must be protected by ________________.
A
PV valves
B
warning signs
C
flame screens
D
stop-check valves
E
İlgili Sorular
A lookout can leave his station __________.BOTH INTERNATIONAL & INLAND What is NOT a distress signal?The anchors on the bow are known as __________.When a magnetic compass is not in use for a prolonged period of time it should _____________.When the gyropilot is used for steering, what control is adjusted to compensate for varying sea cond...