Allied & ICAR Exam Bank • ALLIED_0280 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

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

Question Statement:

Crankcase positive ventilation (PCV) in tractor engines serves to:

Options:

  • (A) Evacuate blow-by combustion gases and unburnt fuel vapors from the crankcase to prevent oil dilution and sludge formation
  • (B) Pressurize fuel tank
  • (C) Cool fuel injectors
  • (D) Exhaust air from cabin

Answer Key:

A

Step-by-Step Solution & Explanation

PCV recycles blow-by gases from the oil pan back into the air intake, keeping crankcase pressure neutral and preventing oil contamination.
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