Allied & ICAR Exam Bank • ALLIED_0269 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: I.C. engine systems – fuel, cooling, lubrication, ignition, electrical, intake and exhaust

Question Statement:

Common Rail Direct Injection (CRDI) systems in modern agricultural tractors provide superior fuel economy and low emissions because:

Options:

  • (A) Fuel rail pressure is maintained extremely high ($1500 - 2000\text{ bar}$) independent of engine speed, enabling multi-stage electronically controlled injection pulses
  • (B) They eliminate all fuel filters
  • (C) They mix fuel with coolant
  • (D) They operate without injectors

Answer Key:

A

Step-by-Step Solution & Explanation

CRDI maintains rail pressure constantly high, allowing electronic ECUs to time pilot, main, and post injections precisely.
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