Heavy Duty Equipment Technician Red Seal Exam Prep · Question
In a common rail diesel fuel system, what is the primary function of the high-pressure pump?
The high-pressure pump's main role in a common rail system is to generate and sustain the extremely high fuel pressure necessary for precise injection into the
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Question: In a common rail diesel fuel system, what is the primary function of the high-pressure pump?
Answer options:
- To filter the fuel before it reaches the injectors ✅ To create and maintain the required pressure in the common rail
- To atomize the fuel for optimal combustion
- To store a reserve of fuel for engine starting
Correct answer: To create and maintain the required pressure in the common rail
Explanation: The high-pressure pump's main role in a common rail system is to generate and sustain the extremely high fuel pressure necessary for precise injection into the cylinders.
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