OCTCO/OCTF Exit Exam • Set 1 Question 10 of 30
What device protects oil cargo tanks against overpressure or vacuum structural damage?
✓
Direct Answer
Option A: High-velocity Pressure/Vacuum (P/V) valve
High-velocity pressure/vacuum valves protect cargo tank structural integrity by automatically venting overpressures or breaking vacuums during loading, discharging, and thermal breathing operations.
All Options
A
High-velocity Pressure/Vacuum (P/V) valve
(Correct Answer)
B
Gate valve
C
Quick closing valve
D
Storm valve
Detailed Explanation & Context
High-velocity pressure/vacuum valves protect cargo tank structural integrity by automatically venting overpressures or breaking vacuums during loading, discharging, and thermal breathing operations.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Oil and Chemical Tanker Cargo Operations (OCTCO/OCTF).
Advertisement
Practice Full OCTCO/OCTF Set 1
Test yourself with 30 interactive questions, live timer, and instant score.