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100+ Free LC Engineering Practice Questions

Leaving Certificate Engineering (Ireland) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: LC Engineering Exam

25% + 25% + 50%

Current syllabus weightings: design project, practical skills exam, written paper

NCCA / State Examinations Commission Engineering assessment

150 marks

Each of the project and practical components is worth 150 marks

NCCA Engineering background paper

300 marks HL

Higher Level written examination total marks on the current syllabus

State Examinations Commission past papers

3 components

Current assessment uses project, practical and written components

Curriculum Online - Engineering

Exam to 2027

The current Engineering syllabus is examined to June 2027

Curriculum Online - Engineering

First exam 2028

Revised specification introduced for fifth year Sept 2026 is first examined in 2028

Curriculum Online - Engineering

H1-H8 / O1-O8

Results use the eight-point Higher and Ordinary grade scales

State Examinations Commission grading scale

100

Free original single-best-answer practice questions in this bank

OpenExamPrep

Leaving Certificate Engineering (Ireland) is a senior-cycle SEC subject combining materials, manufacturing, mechanisms, electronics basics, design and workshop safety. Under the syllabus examined to June 2027 it is assessed by a design project (25%), a practical skills exam (25%) and a written paper (about 50%, Higher Level 300 marks). Grades use the H1-H8 / O1-O8 scale. A revised specification (project 50% + written 50%) begins for fifth year in September 2026 and is first examined in 2028. Official papers are long-form and practical, not MCQ; this free bank offers 100 original single-best-answer study questions.

Sample LC Engineering Practice Questions

Try these sample questions to test your LC Engineering exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In Leaving Certificate Engineering workshop practice, which personal protective equipment (PPE) is essential when grinding metal?
A.Safety goggles or a face shield
B.Only a cotton apron
C.Open-toed shoes
D.Loose jewellery for identification
Explanation: Grinding throws sparks and abrasive particles. Eye and face protection (goggles or face shield) is mandatory; other PPE such as suitable footwear is also required, but eye protection is the critical answer here.
2Which property describes a material’s ability to be drawn into wire without fracture?
A.Ductility
B.Hardness
C.Brittleness
D.Elasticity
Explanation: Ductility is the ability of a material to undergo permanent tensile deformation without fracture, as when wire is drawn. Hardness resists indentation; brittleness is the opposite of ductility; elasticity is recovery of shape after unloading.
3Mild steel is classified primarily as which type of metal?
A.A ferrous metal
B.A non-ferrous metal
C.A thermoplastic polymer
D.A ceramic
Explanation: Mild steel is an iron–carbon alloy with low carbon content, so it is a ferrous metal. Non-ferrous metals do not have iron as the main base; polymers and ceramics are non-metallic.
4What is the main purpose of annealing a metal workpiece?
A.To soften it and relieve internal stresses
B.To maximise surface hardness only
C.To increase carbon content chemically
D.To oxidise the surface for colour
Explanation: Annealing heats a metal to a suitable temperature and cools it slowly (often in the furnace) to soften the structure, relieve residual stress and improve machinability or formability.
5Which joining process uses a coated consumable electrode and an electric arc without a separate shielding-gas cylinder?
A.Manual metal arc (MMA) welding
B.TIG (TAGS) welding
C.Oxy-acetylene gas welding
D.Resistance spot welding
Explanation: MMA (stick) welding uses a flux-coated consumable electrode; the flux provides a gas shield and slag. TIG uses a non-consumable tungsten electrode plus inert gas; oxy-acetylene uses a flame; spot welding uses pressure and current through electrodes.
6On a centre lathe, which operation reduces the diameter of a cylindrical workpiece by cutting along its length?
A.Turning (parallel turning)
B.Facing
C.Parting off
D.Knurling
Explanation: Parallel turning feeds the tool along the axis so the diameter is reduced. Facing cuts across the end face; parting cuts off a length; knurling impresses a pattern without removing diameter as the main goal.
7In a simple gear train, a 20-tooth driver gear meshes with a 40-tooth driven gear. What is the velocity ratio as driver revolutions : driven revolutions?
A.2 : 1
B.1 : 2
C.1 : 1
D.4 : 1
Explanation: For meshing gears, N_driver / N_driven = T_driven / T_driver = 40/20 = 2. The driver therefore turns twice for each turn of the driven gear, giving a 2:1 speed reduction ratio (driver : driven).
8Which force tends to pull a member apart along its axis?
A.Tension
B.Compression
C.Shear
D.Torsion
Explanation: Tensile force pulls along the axis and tends to elongate the member. Compression shortens it; shear slides layers; torsion twists about the axis.
9What does an LED do in a simple electronic circuit?
A.Emits light when forward biased with suitable current
B.Stores electrical charge like a battery
C.Measures temperature by resistance change only
D.Blocks all current in both directions permanently
Explanation: A light-emitting diode (LED) emits light when forward biased and carrying an appropriate current (usually with a series resistor). It does not store energy like a battery, is not primarily a temperature sensor (that is a thermistor), and does not block both directions forever—it conducts one way when forward biased.
10Which first stage of the engineering design process responds to the brief by clarifying needs and constraints?
A.Analysis / research of the brief
B.Final evaluation only after manufacture
C.Mass production without a plan
D.Disposal of materials before design
Explanation: Good design begins by analysing the brief: research needs, constraints, users and criteria before developing ideas and manufacturing. Evaluation comes later; production without analysis is poor practice.

About the LC Engineering Practice Questions

Verified exam format metadata for Leaving Certificate Engineering (Ireland) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.