Investigating Mechanisms & Machines (Junior Cert Engineering): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What is a key benefit of investigating existing mechanisms for engineers?
What is a key benefit of investigating existing mechanisms for engineers?
Helps make better purchasing decisions
How many key criteria are used to assess mechanisms and machines?
How many key criteria are used to assess mechanisms and machines?
Seven criteria
Which parts of a can opener wear out over time?
Which parts of a can opener wear out over time?
Toothed wheel & plastic bushings
What material is the scriber made from in a surface gauge?
What material is the scriber made from in a surface gauge?
High carbon steel
Why does a mortise lock latch have one curved side?
Why does a mortise lock latch have one curved side?
Gets pushed in by receiver when door closes
In an electric bell, what breaks the electrical circuit?
In an electric bell, what breaks the electrical circuit?
Spring pulling away from contact screw
What does the crankshaft convert in an engine?
What does the crankshaft convert in an engine?
Reciprocating motion into rotary motion
How many strokes does a four-stroke engine need for each complete cycle?
How many strokes does a four-stroke engine need for each complete cycle?
Four strokes
During the induction stroke, which valve opens?
During the induction stroke, which valve opens?
Inlet valve only
What ignites the fuel mixture during the power stroke?
What ignites the fuel mixture during the power stroke?
Spark plug
What does a two-stroke engine use instead of valves?
What does a two-stroke engine use instead of valves?
Three ports
How many crankshaft revolutions does a two-stroke engine need per cycle?
How many crankshaft revolutions does a two-stroke engine need per cycle?
One revolution
What does the reliability criterion assess?
What does the reliability criterion assess?
If it works consistently over time