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Multiple Choice

Which components are involved in the operation of the valve during fuel injection?

• Ball valve, overflow throttle, inlet throttle, control chamber, fuel outlet

• Plunger, spring, fuel supply, outlet valve, control rod

• Nozzle body, electrical connector, fuel channel, injector needle, control rod

• Overflow throttle, fuel supply, control chamber, injector needle, outlet valve

Open Ended

Describe how the fuel injector nozzle (sprausla) operates when fuel is being injected versus when it is not.

Multiple Choice

What is the significance of a high-pressure fuel pump in modern engines?

• It increases engine noise

• It improves fuel atomization and efficiency

• It reduces engine temperature

• It decreases fuel consumption

Open Ended

Explain how the movement of the plunger in a high-pressure fuel pump affects the fuel delivery process.

Multiple Choice

Which two types of fuel injection methods are used in diesel engine supply systems?

• Common Rail and conventional injection methods

• Rotary and section pumps

• Direct and indirect injection

• Single and multi-point injection

Multiple Select

Which of the following are advantages of the conventional fuel injection principle?

• Pressure increases due to three-dimensional connections, ensuring good combustion

• Lower fuel quantity can be injected with lower pressure

• It allows for quieter engine operation

• It reduces NOx emissions

Open Ended

Explain the main stages involved in the 'Common Rail' fuel injection process.

Multiple Choice

What is the main reason for heating diesel fuel during winter?

• To prevent paraffin from separating and clogging the fuel filter

• To increase engine power

• To reduce fuel consumption

• To improve fuel color

Open Ended

Explain how the bimetallic valve functions in the fuel heating system and what happens when it is open versus closed.

Multiple Choice

Which components are involved in the diesel fuel heating system as shown in the diagram?

• Cylinder head, coolant, fuel supply from tank, thermostat, fuel supply to filter, heated fuel outlet

• Fuel pump, air filter, radiator, thermostat

• Cylinder block, oil pan, fuel tank, thermostat

• Fuel injector, spark plug, coolant, thermostat

Multiple Choice

What are two advantages of the 'Common Rail' injection system compared to other high-pressure systems, based on the graph and text?

• Higher injection pressure at lower engine speeds, easier to achieve required injection pressure across RPM range

• Lower fuel consumption, simpler design

• Lower emissions, less maintenance required

• Higher engine temperature, faster acceleration

Open Ended

Describe the steps required to set up the high-pressure pump when it is driven by a gear, according to the instructions provided.

Open Ended

What is the purpose of measuring the plunger travel in a high-pressure fuel pump, and how is this measurement typically performed according to the instructions and diagram?

Open Ended

Explain the function of the high-pressure fuel pump in an engine system. Why is each component important for its operation?