Main Propulsion Flashcards
Which internal combustion engine fuel is rated by CETANE number
Diesel
What fuel(s) is used in the shipboard gas turbine
Aviation jet fuel and diesel fuel
In a reciprocating engine, the reciprocating action of the piston and connecting rod are changed to a turning motion by the ______
Crankshaft
The strike sequence of the four stroke cycle engine is ______
Intake, compression, power, exhaust
In a four stroke cycle engine, the piston always travel toward the cylinder head during the
Compression and exhaust
In a four stroke cycle engine, both intake and exhaust valves are closed on the _____ strokes.
Power and compression
After leaving the carburetor, the air fuel mixture then goes to the _____
Intake ports or valve
In the 2 stroke cycle engine, the exhaust and intake events occur during the _____ stroke.
Power
A 2 stroke cycle engine can be readily recognized by its ______
Cylinder ports
How can a 2 stroke cycle Diesel engine be identified?
Cylinder ports
In gasoline internal combustion engines, the fuel mixture in the cylinder is ignited by a _________
Spark plug
What device boosts the low voltage in the battery ignition system on internal combustion engine?
Ignition coil
What device sends an ignition spark to the spark plug at the correct instant?
Distributor
The magneto is a device similar to an ____
Electronic generator
In a four stroke cycle gasoline engine, fuel is mixed with air in the ______
Carburetor
What is used to ignite fuel in a Diesel engine?
Heat of compression
What device adds fuel to a Diesel engine cylinder?
Injector
What device applies air pressure to the intake of an operating Diesel engine?
Blower
What is the main function of a supercharger?
Increasing engine output
What is the function of an engine coolant system?
Maintain a specific operating temp
In a simple cooling system, the thermostat ____
Regulates water temp
What are the 4 main functions of lube oil
Cools, clean, lubricates, seals
An engine where the lube oil is stored in the crankcase of the engine is called the ______ type
Wet sump
When lube oil leaves and engine sump, it goes through a _______
Screen
In a 2 stroke cycle gasoline engine, where is the lube oil placed?
Fuel tank
In a gas turbine, how is the burning fuel used to develop mechanical energy?
Expanding gases turn the turbine blades
What is the function of the free turbine?
Converts energy of the engine exhaust into mechanical energy
What is the main disadvantage of the gas turbine engine?
High fuel consumption
