DPO DPO Alarms, Fault Diagnosis & System Troubleshooting 2

Question 1

During DP operations, a sudden loss of one power bus in a DP-2 vessel should result in:

Accepted Answer

A safe reduction in available thrust but continued DP operation on the remaining bus

Answer

DP-2 class vessels are designed so that a single power failure does not cause loss of position; the remaining bus supports continued DP operation with reduced but adequate thrust.

Question 2

A DP operator notices the vessel is consuming unusually high thruster power to maintain position without a significant change in weather. The most likely cause is:

Accepted Answer

An undetected current increase, propeller fouling, or a thruster operating below efficiency

Answer

Higher-than-expected power demand without apparent environmental change can indicate a fouled propeller, reduced thruster efficiency, or an unmonitored current that the environmental model has not captured.

Question 3

What action should a DPO take when a reference system shows a 'loss of lock' alarm during critical DP operations?

Accepted Answer

Inhibit the alarming reference and verify that remaining references are stable and sufficient

Answer

When a reference loses lock, it should be inhibited to prevent corrupted data entering the DP position filter, and the operator must verify remaining references maintain adequate coverage.

Question 4

On a DP vessel, the term 'UPS' in the context of the control system refers to:

Accepted Answer

Uninterruptible Power Supply, which maintains power to DP computers during a brief power interruption

Answer

A UPS (Uninterruptible Power Supply) provides short-term battery-backed power to DP computers and control systems, preventing loss of the DP system during brief power transients.

Question 5

If the DP computer's position filter diverges from actual vessel position due to accumulated reference errors, the operator can correct this by:

Accepted Answer

Performing a 'position reset' or reinitiating the filter after confirming a reliable reference

Answer

Resetting or reinitiating the DP position filter with a validated reference allows the system to re-synchronize its estimated position with the vessel's actual location.

(DPO) Dynamic Positioning Operator Exam Practice Test

(DPO) Dynamic Positioning Operator Exam Practice Test

DPO DPO Alarms, Fault Diagnosis & System Troubleshooting 2