Diesel Fuel Systems

Quiz
•
Science
•
12th Grade
•
Hard
Standards-aligned
Lisa Thompson
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What happens when the fuel pump pressure is too low?
Emissions decrease
Engine misfires or stalls
Fuel efficiency improves
Fuel flow increases
Answer explanation
When fuel pump pressure is too low, the engine may not receive enough fuel, leading to misfires or stalling. This disrupts the combustion process, causing performance issues.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which material is typically used for manufacturing high-pressure fuel pump components?
Aluminum
Copper
Hardened steel
Plastic
Answer explanation
Hardened steel is used for high-pressure fuel pump components due to its strength and durability, which can withstand the extreme pressures and wear associated with fuel systems. Other materials like aluminum and plastic are not suitable.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the main purpose of a fuel pump governor in a diesel engine?
To adjust the air-fuel ratio
To filter impurities in the fuel
To increase the fuel flow
To regulate the engine speed
Answer explanation
The main purpose of a fuel pump governor in a diesel engine is to regulate the engine speed. It controls the amount of fuel delivered to the engine, ensuring optimal performance and efficiency.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is a common symptom of a failing diesel fuel pump?
Blue smoke from the exhaust
Difficulty starting the engine
Excessive vibration from the engine
Reduced engine temperature
Answer explanation
A common symptom of a failing diesel fuel pump is difficulty starting the engine. This occurs because the pump is unable to deliver the necessary fuel pressure for ignition.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why is fuel pump calibration important in diesel engines?
To ensure accurate fuel delivery and engine efficiency
To maximize exhaust gas recirculation
To minimize wear on the timing belt
To reduce the weight of the engine
Answer explanation
Fuel pump calibration is crucial in diesel engines to ensure accurate fuel delivery, which directly impacts engine efficiency and performance. Proper calibration helps maintain optimal combustion and reduces emissions.
Tags
NGSS.HS-PS3-3
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the typical operating pressure range of a modern common rail diesel fuel injector?
500-1000 bar
100-300 bar
1000-2000 bar
10-50 bar
Answer explanation
Modern common rail diesel fuel injectors typically operate at pressures between 1000-2000 bar. This high pressure allows for better atomization of fuel, improving combustion efficiency and performance.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which component in a diesel injector helps atomize the fuel?
Camshaft
Delivery valve
Glow plug
Nozzle
Answer explanation
The nozzle in a diesel injector is responsible for atomizing the fuel, breaking it into fine droplets for better combustion. The other components, like the camshaft and glow plug, serve different functions in the engine.
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