Internal Combustion Engines
The spark ignition engines are governed by

Hit and miss governing
Combination of (B) and (C)
Quantitative governing
Qualitative governing

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Internal Combustion Engines
Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads

The engine is rarely operated
The friction is unpredictable
The small difference in cooling water temperature or in internal friction has a disproportionate effect
The friction is high

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