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WorksheetsMarine Growth and Cathodic Protection Systems Quiz
Total questions: 50
Worksheet time: 25mins
What is the main purpose of the Marine Growth Cathodic Protection (MGCP) system?
To heat seawater
To prevent marine growth on hull components
To increase hull friction
To improve fuel combustion
Which component of an MGCP system releases biocides to suppress marine growth?
Shaft grounding brush
MGPS anode
Heat exchanger
Fuel oil purifier
What powers the MGCP system during normal operations?
Solar energy
Shore power
Ship’s electrical supply
Battery charger
What is the main function of an Impressed Current Cathodic Protection (ICCP) system?
To increase current load on generators
To reduce corrosion of the ship’s hull
To heat ballast tanks
To stabilize radar signals
Which component of the ICCP system adjusts output voltage automatically?
Reference electrode
Diesel alternator
Anode box
Motor starter
What does the ICCP power control unit monitor continuously?
Sea temperature
Hull potential
Oil viscosity
Bilge water level
What does SOLAS require for emergency lighting systems on board ships?
They must be glow-in-the-dark
They must activate automatically during power failure
They must operate only in daytime
They must use halogen lamps
Which navigation light must ships display when at anchor?
Masthead light
Anchor light
Stern light
Port light
Which type of light provides signalling capability during restricted visibility?
Searchlight
Masthead light
Fog signal light
Deck floodlight
Which device triggers alarms in a ship’s fire alarm system?
Synchroscope
Flame detector
Power meter
Radar transponder
What does a fire alarm control panel mainly do?
Amplifies radio signals
Receives detector inputs and activates alarms
Controls bilge pumps
Measures engine speed
Which fire detection method senses temperature rise?
Heat detector
Smoke detector
Gas detector
UV detector
What is the compressor's function in an HVAC refrigeration cycle?
Reduces refrigerant temperature
Circulates seawater
Compresses low-pressure vapor into high-pressure vapor
Cleans air filters
Which component absorbs heat inside cooled spaces?
Evaporator
Condenser
Receiver
Relief valve
Which refrigerant hazard is most common in ship HVAC systems?
Toxicity
Flammability
Corrosiveness
High pressure
What is the primary hazard of lead-acid batteries on ships?
Radioactive fumes
Hydrogen gas emission
Liquid nitrogen leaks
High-voltage arcing
Which type of battery is commonly used in emergency lighting systems?
Lithium-ion
Lead-acid
Nickel-iron
Silver-zinc
What is a safety requirement when charging batteries?
Charge inside sealed containers
Maintain proper ventilation
Charge only during nighttime
Immerse batteries in water
What is the purpose of explosion-proof equipment in hazardous atmospheres?
To reduce noise
To prevent ignition of explosive gases
To increase motor horsepower
To cool electronic circuits
Which classification defines hazardous zones by duration of gas presence?
STCW
IEC/ATEX
MARPOL
SOLAS Fire Code
Zone 1 hazardous area refers to what condition?
Rare gas presence
Continuous gas presence
Frequent gas presence
No gas presence
What is a key advantage of using high voltage on ships?
Reduced cable size
Increased battery weight
Lower generator efficiency
Higher fuel consumption
What is a disadvantage of using HV systems?
Decreased power capability
Higher risk of arc flash
Reduced power transmission distance
Lower motor capacity
High voltage on ships commonly starts at what level?
220V
440V
6600V
12V
According to STCW, which personnel may work unsupervised on HV systems?
Deck cadet
Able seaman
HV-trained engineer officer
Catering staff
What is required for HV competence per STCW?
Welding training
High voltage safety training
Lifeboatman certificate
Refrigeration course
Which assessment is part of HV competency certification?
Swimming test
Practical evaluation on HV switching
CPR examination
Rope-throwing test
What does the HV main switchboard primarily do?
Stores navigation data
Distributes HV electrical power
Controls bilge pumps
Measures fuel viscosity
Which HV component steps down voltage for low-voltage systems?
HV breaker
Transformer
Synchronous motor
Condenser
What protects HV equipment from overcurrent?
Water gauge
Circuit breaker
Air vent
Fuses only
What is a hazard in HV systems?
Mild vibrations
Arc flash
Slow voltage rise
Low-frequency noise
Which HV mitigation method reduces arc flash energy?
Painting switchboards
Using arc-resistant gear
Increasing humidity
Reducing lighting
What should be done before entering HV enclosures?
Wear sunglasses
Conduct lockout–tagout
Play alarm horns
Raise generator load
What does an Arc Detection Unit mainly sense?
Temperature
Light from an arc flash
Pressure changes
Vibration
What does an Arc Detection Unit do once an arc is detected?
Increases power supply
Trips circuit breakers
Lowers switchboard illumination
Activates navigation lights
Which sensor is commonly used in arc detection units?
Ultrasonic sensor
Light sensor
Gas sensor
Motion sensor
What is the first step in HV risk management per IACS?
Install new switchboards
Identify hazards
Paint machinery spaces
Inspect lifeboats
What is done after risks are evaluated?
Ignore hazards
Implement controls
Reduce officer rest hours
Increase generator load
What tool is used to score likelihood vs severity in HV risk assessment?
Stopwatch
Risk matrix
GPS plotter
Hydrometer
What is the purpose of reviewing risk controls periodically?
To increase paperwork
To ensure controls remain effective
To extend drydock period
To train deck officers
Which type of control is the most effective in risk mitigation?
PPE
Elimination
Warning signs
Administrative control
What should be documented after carrying out HV risk assessment?
Crew meal plan
Risk assessment report
Weather forecast
Cargo manifest
ICCP systems reduce corrosion by supplying what type of current?
Alternating current
Pulsating DC
Impressed DC
Reversed AC
Which lighting must operate for at least 3 hours during blackouts per SOLAS?
Deck floodlight
Emergency lighting
Cargo floodlight
Cabin night lamp
What does the fire alarm loop ensure?
Faster engine speed
Continuous monitoring of detectors
Automatic fuel transfer
Ventilation shutdown
What happens in the condenser during refrigeration?
Liquid is evaporated
Vapor is compressed
Heat is rejected
Air is dehumidified
Lithium-ion battery failures may cause what hazard?
Hypercooling
Thermal runaway
UV emissions
Marine fouling
What type of protection is required for motors in Zone 1 areas?
Waterproof only
Pressurized or explosion-proof
Non-insulated
Open-frame
What is the effect of using HV in ship propulsion systems?
Higher transmission losses
Lower current for same power
Reduced generator life
Increased fuel consumption
What does an HV interlock system prevent?
Generator cooling
Opening live HV compartments
Battery charging
Rudder movement
