Allied & ICAR Exam Bank • ALLIED_1137 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Tractor Fuel Injection Pumps

Question Statement:

In an inline fuel injection pump of a multi-cylinder tractor diesel engine, the quantity of fuel delivered per stroke is governed by:

Options:

  • (A) Rotating the plunger via the control rack and toothed pinion, varying the effective stroke using the helix groove
  • (B) Varying the total camshaft lift
  • (C) Changing the nozzle orifice diameter
  • (D) Altering the delivery valve spring stiffness

Answer Key:

A

Step-by-Step Solution & Explanation

Rotating the pump plunger aligns its helical relief edge with the spill port earlier or later during the stroke, controlling the effective delivery stroke length and metered fuel volume.
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