Solve this multiple-choice question and choose the correct option.

Home » Mechanical Engineering » IC Engines and Nuclear Power Plants

Diesel ignition delay terminology: identify the correct name for the interval between injection and ignition. Definition prompt: In a CI (diesel) engine, the time between start of injection and actual start of combustion is called what?

Difficulty: Easy

Pre-ignition period
Delay period
Period of ignition
Burning period

Correct Answer: Delay period

Explanation:

Concept/ApproachAfter fuel injection begins, atomization, vaporization, and mixing with hot compressed air take finite time before auto-ignition occurs. This interval is the ignition delay period.

Final AnswerDelay period.

← Previous Question Next Question→

More Questions from IC Engines and Nuclear Power Plants

Typical diesel injection pressure: choose the closest standard value. Select the approximate fuel injection pressure used in conventional diesel engines.
Secondary (bred) nuclear fuels used in power reactors: select the correct pair. Definition: “Secondary fuel” refers to fissile material bred from fertile isotopes inside reactors. Choose the correct pair commonly identified as secondary fuels.
Effect of compression ratio on knock in petrol (SI) engines: evaluate the statement. Statement: “Detonating (knocking) tendency in petrol engines increases as compression ratio increases.” Choose whether the statement is correct.
Nuclear marine/space propulsion: fuel form for compact propulsion reactors Reactors designed for propulsion applications (e.g., naval or space power units) require which fuel form to achieve a compact, long-life core at practical power density? Choose the correct option.
Diesel engines on weak (lean) mixtures: effect on thermal efficiency For compression-ignition (diesel) engines operating with weak or lean mixtures (excess air), how does the thermal efficiency change? Choose the correct option.
Diesel ignition principle: fuel spray ignition due to hot compressed air Statement: In a diesel (compression-ignition) engine, fuel is injected as a fine spray into the cylinder and it ignites because the compressed air temperature is high. Decide whether the statement is correct.
Spark-ignition engines – stoichiometric mixture strength What is the approximate stoichiometric air–fuel ratio by mass for petrol (gasoline) used in spark-ignition engines?
Internal Combustion Engines – Suction Stroke in a Spark-Ignition (Petrol) Engine During the suction (intake) stroke of a conventional carburetted petrol engine, what working charge is drawn into the cylinder through the intake valve?
Nuclear Reactor Fundamentals – What Does a Moderator Do? In a thermal nuclear reactor, a 'moderator' primarily performs which role with respect to fast neutrons produced by fission?
Turbojet Architecture – Does the Compressor Need a Turbine? Evaluate the statement: 'A turbo-jet does not require a turbine to drive the compressor.' State whether it is correct for practical turbojet engines.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion