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Question: ❓A ship's main engine cannot reach rated power following propeller fouling. Exhaust temperatures andfuel index...
12/10/2026

Question: ❓
A ship's main engine cannot reach rated power following propeller fouling. Exhaust temperatures andfuel index rise while speed remains low. What is the best response?

A. Treat it as a governor fault without inspecting propulsion system
B. Increase fuel index above the permitted limit
C. Compare engine and shaft performance with clean-hull baseline
D. Disable the torque limiter to restore rated rpm

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Question: ❓A propulsion engine shows increasing exhaust back pressure, falling turbocharger efficiency and rising fuel c...
11/10/2026

Question: ❓
A propulsion engine shows increasing exhaust back pressure, falling turbocharger efficiency and rising fuel consumption. Cleaning the air-side compressor did not improve performance. What should the investigation prioritise next?

A. Exhaust-gas-side fouling, economiser restriction, exhaust valve condition and other causes of excessive gas-side resistance
B. Replacing the AVR
C. Changing the freshwater generator's ejector nozzle
D. Increasing fuel delivery until original power is restored

Question: ❓A fuel oil purifier repeatedly loses its water seal after a change of fuel batch. The new fuel has different ...
11/10/2026

Question: ❓
A fuel oil purifier repeatedly loses its water seal after a change of fuel batch. The new fuel has different density and viscosity. What should be assessed first?

A. The old gravity disc setting must remain correct for every fuel
B. The engine's starting-air pressure
C. The sludge tank level
D. Fuel properties and temperature, interface/gravity-disc suitability, throughput considerations

10/10/2026

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Question: ❓A seawater-cooled main-engine cooler suffers repeated tube leakage after several repairs. Differential pressu...
10/10/2026

Question: ❓
A seawater-cooled main-engine cooler suffers repeated tube leakage after several repairs. Differential pressure has increased and outlet temperature control is unstable. Which long-term response is best?

A. Continue patching individual tubes indefinitely
B. Increase seawater velocity without checking erosion limits
C. Carry out root-cause analysis of corrosion, erosion, flow distribution, materials, water chemistry and operating conditions, then evaluate permanent repair or replacement
D. Blank every leaking tube regardless of the maker's allowable plugging limit

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Question: ❓A main engine exhaust-gas economiser develops a suspected soot fire at sea. Exhaust temperature rises abnorma...
10/10/2026

Question: ❓
A main engine exhaust-gas economiser develops a suspected soot fire at sea. Exhaust temperature rises abnormally and uptake temperatures become uneven. What is the best initial command-levelresponse?

A. Increase engine load to carry soot out of the economiser
B. Follow the vessel's soot-fire procedure, coordinate load reduction or shutdown as required, manage soot blowing and water circulation strictly
C. Open access doors immediately to inspect the fire
D. Increase soot-blower pressure beyond the approved limit

Question:❓A ship experiences a total blackout. The emergency generator starts but its breaker does not connectto the eme...
10/10/2026

Question:❓
A ship experiences a total blackout. The emergency generator starts but its breaker does not connectto the emergency switchboard. Which sequence is most appropriate?

A. Verify emergency generator operation, breaker control power, interlocks, voltage/frequency and switchboard condition in accordance with the emergency power recovery procedure
B.Manually parallel the emergency generator with the dead main bus without checking interlocks
C. Bypass all protective relays and close the breaker immediately
D. Wait indefinitely for the main generators to restart automatically

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Question: ❓A main engine's cylinder oil consumption rises sharply after prolonged low-load operation. Scavengedrain anal...
08/10/2026

Question: ❓
A main engine's cylinder oil consumption rises sharply after prolonged low-load operation. Scavengedrain analysis shows increased iron content. What is the most responsible interpretation?

A. Low-load operation always causes irreversible liner failure
B. Immediately increase cylinder oil feed to the maximum permitted rate without further assessment
C. The iron content proves the crankshaft is cracked
D. Possible liner/ring wear or scuffing requires corroboration from drain analysis, and scavenge inspection

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Question:❓Following a scavenge-space fire on a ship's main engine, the exhaust temperatures remain uneven and turbocharg...
08/10/2026

Question:❓
Following a scavenge-space fire on a ship's main engine, the exhaust temperatures remain uneven and turbocharger performance deteriorates. Which approach best supports a safe return to service?

A. Follow the engine-specific fire response, allow safe cooling, inspect affected spaces and components, establish the cause, and conduct controlled checks before loading
B. Immediately restore full load once visible smoke disappears
C. Wash the scavenge space with seawater while the engine is running
D. Disable scavenge temperature alarms to avoid nuisance warnings

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Question: ❓A crankshaft deflection survey shows a significant change from the ship's baseline after grounding.Which deci...
07/10/2026

Question: ❓
A crankshaft deflection survey shows a significant change from the ship's baseline after grounding.Which decision is most appropriate?

A. Accept the result if the engine can still turn on turning gear
B. Adjust readings mathematically to match the baseline
C. Increase bearing lubrication pressure and resume full speed
D. Repeat measurements under controlled, comparable conditions and investigate alignment, hull deformation, bearing condition and maker's limits before authorising operation

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