Interlocks in Marine Diesel Engines

What is the main purpose of interlocks in marine diesel engines?

• To increase engine speed

• To ensure safety and prevent accidents

• To reduce fuel consumption

• To enhance propulsion power

Which interlock prevents the engine from starting when the turning gear is engaged?

• Running Direction Interlock

• Turning Gear Interlock

• Fuel Supply Interlock

• Auxiliary Blower Interlock

The Running Direction Interlock ensures that:

• The engine does not start with low coolant temperature

• The engine runs in the commanded direction from the bridge

• The turning gear is properly engaged

• The scavenge air temperature remains low

Which interlock prevents the engine from starting if lubrication is insufficient?

• Coolant Temperature Interlock

• Auxiliary Blower Interlock

• Lubricating Oil Pressure Interlock

• Fuel Quality Interlock

The Coolant Temperature Interlock helps prevent:

• Excessive vibrations

• Thermal shock and overheating

• Fuel starvation

• Cylinder lubrication failure

Which interlock shuts down the engine immediately in case of critical emergencies?

• Slowdown Interlock

• Overspeed Interlock

• Emergency Stop Interlock

• Governor Interlock

Overspeed Interlocks are primarily concerned with:

• High fuel temperature

• Low jacket water pressure

• Excessive engine RPM

• Piston cooling temperature

Which parameter is NOT monitored by overload interlocks?

• Torque

• Power

• Current

• Salinity of cooling water

Governor Interlocks protect the engine by:

• Monitoring and controlling fuel supply

• Preventing low lube oil pressure

• Stopping overspeed vibrations

• Checking cylinder exhaust temperatures

Which interlock ensures auxiliary blowers are running before engine operation?

• Fuel Supply Interlock

• Auxiliary Blower Interlock

• High-Temperature Interlock

• Governor Interlock