Lathework (Junior Cert Engineering): Quizzes
📚Quizzes
Practise the questions
15 questions from this quiz
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Practise the questions
15 questions from this quiz
What is the basic operating principle of a centre lathe?
What is the basic operating principle of a centre lathe?
Workpiece rotates, tool is stationary
What material is the lathe bed made from?
What material is the lathe bed made from?
Cast iron
Where is the headstock permanently mounted on a centre lathe?
Where is the headstock permanently mounted on a centre lathe?
At the left end of the bed
What is the primary function of the tailstock?
What is the primary function of the tailstock?
Support outer end of long workpieces
What does the cross slide enable on a lathe?
What does the cross slide enable on a lathe?
Move tool at right angles to bed
What mechanism connects the jaws in a three-jaw self-centring chuck?
What mechanism connects the jaws in a three-jaw self-centring chuck?
Scroll mechanism
What advantage does a four-jaw independent chuck offer over a three-jaw chuck?
What advantage does a four-jaw independent chuck offer over a three-jaw chuck?
Greater accuracy
Why must dead centres be hardened?
Why must dead centres be hardened?
Workpiece rotates against them
What is the included angle of lathe centres?
What is the included angle of lathe centres?
60 degrees
How many tool holders can a four-way toolpost accommodate simultaneously?
How many tool holders can a four-way toolpost accommodate simultaneously?
Four
What key advantage do HSS tool bits have over carbide inserts?
What key advantage do HSS tool bits have over carbide inserts?
Can be reground when dull
What happens when a cutting tool is positioned above centre height?
What happens when a cutting tool is positioned above centre height?
Increases rake, reduces clearance
In which direction does the tool move during a facing operation?
In which direction does the tool move during a facing operation?
At right angles to rotation axis
Using , what speed for 20mm dia. at 30m/min? ( = 3)
Using , what speed for 20mm dia. at 30m/min? ( = 3)
500 RPM
What must you do with the chuck key immediately after use?
What must you do with the chuck key immediately after use?
Remove it from the chuck