Curioustab
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
Take Free Test
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
Take Free Test
Home
»
Mechanical Engineering
»
IC Engines and Nuclear Power Plants
Effect of coolant temperature on knocking tendency in a petrol (SI) engine How does increasing the cooling-water temperature influence the knocking tendency in a spark-ignition petrol engine? Choose the correct option.
Difficulty:
Easy
Increases knocking tendency
Decreases knocking tendency
No significant effect
Effect is random/indeterminate
Correct Answer:
Increases knocking tendency
Explanation:
← Previous Question
Next Question→
More Questions from
IC Engines and Nuclear Power Plants
Terminology in SI engines: identify whether “detonation” is also called knocking or pinking. Statement to evaluate: “The detonation phenomenon is also referred to as engine knocking or pinking.” Choose whether the statement is correct.
Knock rating reference fuels for spark-ignition engines: choose the correct pair used to define the octane scale. Context: Knock intensity in SI engines is calibrated using blends of two standard reference fuels. Select the correct pair that forms the basis of the octane number scale.
Valve positions during compression in a four-stroke petrol engine: evaluate the statement. Statement: “During the compression stroke the charge is compressed when both the inlet and exhaust valves are closed.” Choose whether the statement is correct.
Use of ordinary (light) water as a reactor moderator with enriched uranium fuel: evaluate the statement. Statement: “Ordinary water is sometimes used as a moderator when enriched uranium is used as fuel in nuclear power plants.” Choose whether the statement is correct.
Purpose of supercharging an engine: select the most complete objective. Context: Supercharging increases intake air density for higher specific output. Choose the correct statement describing why engines are supercharged.
Key requirement of a good I.C. engine combustion chamber: choose the best criterion. Select the most appropriate characteristic of a well-designed combustion chamber.
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?
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.
Discussion & Comments
No comments yet. Be the first to comment!
Posting…
Name
Comment
Post Comment
Join Discussion
Discussion & Comments