Engine cycles (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
In an engine cycle, what must occur for the cycle to be efficient?
In an engine cycle, what must occur for the cycle to be efficient?
Energy output exceeds energy input
During which stroke does the piston move down and draw in an air-fuel mixture?
During which stroke does the piston move down and draw in an air-fuel mixture?
Induction
When does the spark plug ignite the air-fuel mixture in a four-stroke petrol engine?
When does the spark plug ignite the air-fuel mixture in a four-stroke petrol engine?
Near end of compression stroke
What is the expansion stroke also called?
What is the expansion stroke also called?
Power stroke
How does a diesel engine ignite fuel without a spark plug?
How does a diesel engine ignite fuel without a spark plug?
High temperature from compression
What does an indicator diagram show during an engine cycle?
What does an indicator diagram show during an engine cycle?
Pressure-volume relationship
Why does an actual indicator diagram have a smaller area than a theoretical one?
Why does an actual indicator diagram have a smaller area than a theoretical one?
Energy losses from friction
What is indicated power calculated from?
What is indicated power calculated from?
Area of the main p-V loop
What is brake power?
What is brake power?
Actual power output after friction