IC Engine Questions and Answers – Fuel Air Cycle

This set of IC Engines Multiple Choice Questions & Answers (MCQs) focuses on “Fuel Air Cycle”.

1. The air fuel ratio of the petrol engine is controlled by ____________
a) fuel pump
b) governor
c) injector
d) carburettor
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2. Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads ____________
a) the friction is high
b) the friction is unpredictable
c) the small difference in cooling water temperature or in internal friction has a disproportionate effect
d) the engine is rarely operated
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3. The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be ____________
a) higher
b) lower
c) remain unaffected
d) none of the mentioned
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4. The theoretically correct air fuel ratio for petrol engine is of the order of ____________
a) 6:1
b) 9:1
c) 12:1
d) 15:1
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5. Air fuel ratio for idling speed of a petrol engine is approximately ____________
a) 1:1
b) 5:1
c) 10:1
d) 15:1
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6. Air fuel ratio at which a petrol engine can not work is?
a) 8:1
b) 10:1
c) 15:1
d) 20:1 and less
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7. For maximum power generation, the air fuel ratio for a petrol engine of vehicles, is of the order of ____________
a) 9:1
b) 12:1
c) 15:1
d) 18:1
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8. The following volume of air is required for consuming 1 litre of fuel by a four stroke engine is?
a) 1m³
b) 2.5m³
c) 5-6m³
d) 9-10m³
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9. Diesel engine can work on very lean air fuel ratio of the order of 30:1. A petrol engine can also work on such a lean ratio provided?
a) it is properly designed
b) best quality fuel is used
c) can not work as it is impossible
d) flywheel size is proper
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10. A stoichiometric air fuel ratio is ____________
a) chemically correct mixture
b) lean mixture
c) rich mixture for idling
d) rich mixture for over loads
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Sanfoundry Global Education & Learning Series – IC Engine.

To practice all areas of IC Engine, here is complete set of 1000+ Multiple Choice Questions and Answers.