Allied & ICAR Exam Bank • ALLIED_0275 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

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

Question Statement:

In a full-flow engine lubrication system, the oil filter bypass valve opens when:

Options:

  • (A) The filter element becomes clogged with sludge, ensuring un-interrupted oil supply to critical bearings to prevent immediate engine seizure
  • (B) Oil level in oil pan is full
  • (C) Engine is turned off
  • (D) Oil temperature drops below zero

Answer Key:

A

Step-by-Step Solution & Explanation

A bypass valve prevents oil starvation when cold thick oil or a dirty filter creates excessive differential pressure (
gt; 100\text{ kPa}$).
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