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Junior Cycle · The Junior Cert

Junior Cycle Engineering

What has come up on the Engineering papers (2022–2026), topic by topic, with step-by-step practice at Common Level.

Common Level

Engineering, Common Level(6 marks)

Three quick ones from the Engineering topics that come up most.

(a)Which logic gate gives an output of 1 only when both of its inputs are 1?
  1. OR
  2. AND
  3. NOT
(b)Which lathe process makes the end of a bar flat and square to its axis?
  1. Parting off
  2. Parallel turning
  3. Facing
(c)What does LED stand for?
  1. Light-emitting diode
  2. Light-energy detector
  3. Low-energy device
Show the answers

(a) AND

(b) Facing

(c) Light-emitting diode

Your turn: pick the answer for each one.

Common Level

200 flash cards and 120 step-by-step drill questions at Common Level.

What comes up

How many of the last 5 Engineering Common Level papers asked each topic.

TopicAskedLast seenHow often
Material properties & selection banker5 of 52026
Smart & emerging technology banker5 of 52026
Metals & alloys banker5 of 52026
Sustainability & upcycling banker5 of 52026
Control systems & logic gates banker5 of 52026
Electronic components banker5 of 52026
Ergonomics & design features banker5 of 52026
Gear, belt & chain drives banker5 of 52026
Sketching & rendering banker5 of 52026
Drilling & the centre lathe banker5 of 52026
Renewable energy banker5 of 52026
Plastics most years4 of 52026
Bearings & lubrication most years4 of 52026
Joining methods & soldering most years4 of 52026

More topics: CAD, CAM & 3D printing, Finishes & corrosion, Health & safety, Motors, servos & solenoids, Robotics & automation, Composites & smart materials, Electricity & circuits, Fasteners, Hand tools, cutting & bending, Levers, cams, cranks & springs, Marking out & measuring, Heat treatment, Pneumatics & hydraulics, Working drawings & dimensions, Engineering history & inventors, Design process & planning.

Try three

Gear, belt & chain drives, 3 marks

A 100 mm driver pulley turns at 60 rpm and drives a 25 mm pulley. What is the output speed?

  1. 15 rpm
  2. 150 rpm
  3. 240 rpm
Show the answer

240 rpm

Output speed = input speed × driver diameter ÷ driven diameter = 60 × 100 ÷ 25 = 240 rpm. A smaller driven pulley turns faster; 15 rpm uses the ratio the wrong way.

Drilling & the centre lathe, 3 marks

A bar is to be faced, parallel turned, knurled and parted off. Which order is right?

  1. Knurl, part off, turn, face
  2. Face, turn, knurl, part off
  3. Part off, face, knurl, turn
Show the answer

Face, turn, knurl, part off

Face first to get a flat, square end to measure from. Turn and knurl while the bar is held firmly in the chuck. Part off last, because once it is cut off the piece is loose.

Control systems & logic gates, 3 marks

A factory guillotine cuts only while the operator presses two buttons, one with each hand. Which gate is this?

  1. AND gate
  2. OR gate
  3. NOR gate
Show the answer

AND gate

Two-hand control keeps both hands on buttons, well away from the blade. An AND gate gives an output only when button 1 and button 2 are both pressed.

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