Quality Control & Inspection Flashcards
7 cards from real DPO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Quality Control & Inspection flashcards as text
During a DP Annual Trial, which document must be referenced to confirm all tests are conducted as originally approved?
Answer: FMEA proving trial procedure approved by the class society
Annual DP trials must follow the FMEA proving trial procedure approved by the class society to ensure consistency and validity.
A reference system is found to have a consistent 2-meter offset during position quality inspection. The FIRST corrective action should be to:
Answer: Check and update the antenna offset values in the DP system configuration
A consistent positional offset typically indicates incorrect antenna offset or lever-arm values entered in the DP configuration.
When inspecting DP thruster feedback signals, which condition would indicate a quality control failure requiring immediate investigation?
Answer: Pitch feedback reading opposing the demanded direction
Pitch feedback reading in the opposite direction to demand indicates a critical signal inversion fault that could cause uncontrolled thrust.
Under IMCA M 166 guidelines, how frequently should a full DP capability plot be verified against actual vessel performance?
Answer: Annually or after significant changes to the vessel's DP equipment or structure
IMCA M 166 recommends re-verifying DP capability plots annually or whenever major changes affect vessel performance or equipment.
During inspection of a DP vessel's UPS (Uninterruptible Power Supply), which test verifies quality of autonomous power bridging for DP continuity?
Answer: Transfer test timing the switchover from mains to UPS under DP control system load
The transfer test measures the actual switchover time under DP system load, confirming the UPS provides seamless power bridging without DP controller restart.
A quality audit of the DP logbook reveals that consequence analysis was not performed before a critical lift operation. This represents a failure of:
Answer: The pre-operation risk assessment and DP operational planning process
Consequence analysis is a mandatory element of DP operational planning; its omission is a failure of the pre-operation risk assessment process.
When inspecting DP gyrocompass quality, what is the primary indicator that a compass is providing unreliable heading data to the DP system?
Answer: Discrepancy of more than 1° between two independent gyrocompasses
A heading discrepancy exceeding 1° between independent gyrocompasses signals a potential fault and requires investigation before DP operations.