Engine Fundamentals Flashcards
What is the main principle behind a diesel engine’s operation?
A diesel engine operates on the principle of compression ignition.
True or False: Diesel engines use spark plugs to ignite fuel.
False
Fill in the blank: Diesel fuel has a higher _________ point than gasoline.
flash
What type of cycle do diesel engines typically operate on?
Otto cycle
What are the two main types of diesel engines?
Two-stroke and four-stroke
Which component is responsible for injecting fuel into the combustion chamber in a diesel engine?
Fuel injector
Multiple Choice: What is a common compression ratio range for diesel engines? A) 8:1 to 10:1 B) 14:1 to 25:1 C) 10:1 to 12:1
B) 14:1 to 25:1
What is the purpose of the turbocharger in a diesel engine?
To increase the engine’s efficiency and power output.
What is the primary advantage of using diesel fuel over gasoline?
Higher energy density and fuel efficiency.
True or False: Diesel engines produce more torque than gasoline engines.
True
What is the role of the piston in a diesel engine?
To compress the air and convert thermal energy into mechanical energy.
Multiple Choice: Which of the following is NOT a component of a diesel engine? A) Crankshaft B) Camshaft C) Ignition coil
C) Ignition coil
Fill in the blank: The process of mixing air and fuel in the combustion chamber is known as _________.
atomization
What does the term ‘diesel knock’ refer to?
The noise produced by the rapid combustion of fuel in a diesel engine.
What is the function of the cooling system in a diesel engine?
To regulate the engine temperature and prevent overheating.
True or False: Diesel engines are generally more durable than gasoline engines.
True
What is the purpose of the oil pump in a diesel engine?
To circulate oil for lubrication and cooling of engine components.
What does ‘fuel economy’ refer to in the context of diesel engines?
The efficiency of the engine in converting fuel into distance traveled.
Multiple Choice: Which parameter affects the performance of a diesel engine the most? A) Fuel type B) Compression ratio C) Oil viscosity
B) Compression ratio
What is the typical service interval for a diesel engine oil change?
Every 5,000 to 10,000 miles, depending on usage.
Fill in the blank: The ________ system helps to reduce emissions in diesel engines.
exhaust after-treatment
What is the role of the intercooler in a turbocharged diesel engine?
To cool the compressed air before it enters the combustion chamber.
True or False: Diesel engines can run on biodiesel.
True
What is the significance of the ‘smoke point’ in diesel fuel?
It indicates the temperature at which the fuel begins to produce visible smoke.
