Question 198Safety & Environmental - 1st Asst/Chief70% to pass
When a fuel oil tank is being topped off during bunkering operations, the tank valve should be closed _______________.
AI Explanation
The correct answer is B) after the shore pumps are stopped.
When a fuel oil tank is being topped off during bunkering operations, the tank valve should be closed after the shore pumps are stopped. This is to prevent an overflow of fuel oil, which can be a serious fire hazard and environmental concern. Closing the tank valve before the shore pumps are stopped could lead to a sudden surge in pressure and flow, potentially causing damage to the piping system or equipment.
The other answer choices are incorrect:
A) Closing the tank valve rapidly is not recommended, as it can also lead to surge stresses.
C) Preventing gas from escaping through the pressure-vacuum relief valves is not the primary reason for closing the tank valve.
D) Closing the tank valve slowly is not the correct approach, as the key is to close it after the shore pumps have been stopped.
Related Questions
#196 If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should _______________.#197 After fuel tanks have been filled and bunkers completed, which of the listed procedures should be followed next? #199 During fueling operations oil is detected in the water adjacent to your vessel. If however, it is determined to be from some source other than your vessel, you should _______________.#200 During topping off of bunker tanks, the loading rate must be personally supervised by the _______________.#201 The symbol shown in the illustration and used as a reference, from which the height of the center of gravity is measured, is item number _______________. Illustration SF-0022