leaving cert engineering damian keenan 2013. instructions answer section a and section b of question...
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Leaving Cert Engineering
Damian Keenan 2013
Instructions
• Answer Section A and Section B of Question 1 and FOUR other questions.
• All answers must be written in ink on the answer book supplied.
• Diagrams should be drawn in pencil.
• Squared paper is supplied for graphs, as required.
• Please label and number carefully each question attempted.
Q1 – You must answer Section a & section B
• Section A• Given 13 short questions – answer 10
• Read them all and pick the ten you know,
• Section B
• Basic principles of operation and applications of the Stirling engine from its invention in 1816 to its modern uses.”
Q2 Material Testing
• 2012 – • compare impact tests,• Tensile tests on different materials- explain
brittleness-elastic and plastic states• NDT, aircraft internal & external flaws – 2
types for each,• Name one for internal faults in welded joints,
Q2 Material Testing
2011• Metal fatigue & metal creep• Compare Hardness testers – method of
measurement & test material• Stress/ strain graph – find young's & proof
0.1% stress• NDT – Explain why NDT, Describe a test using
ultrasonic
Q2 Material Testing
• 2010• Why test metals till they break – id & describe
impact tester – how it works and why• Load/extension graph – find UTS 0.1% proof
stress• NDT – Describe Eddy Current testing – x ray
testing,
Q2 Material Testing
• 2009• Hardness tester with diamond – identify &
describe features• Stress/strain graph – id points on graph
(elastic, plastic)- describe shape of specimen at middle and end
• NDT – why use in cast bike engines, describe a test used on surface flaws in aluminium,
Q2 Material Testing
• 2008• Micoscopic vrs macroscopic examination of
metals – explain Creep, 2 factors that influence creep – compare indentors in brinnel & vickers
• Stress strain graph, find youngs & 0.1% proof stress
• Id NDT to determine surface & internal flaws on casting – describe test to locate internal defect
Q2 Material Testing
• 2006• Compare Brinell & Vickers, explain elastic
limit, id 2 factors to prevent early fatigue,• Load/extension graph – find tensile strength &
youngs• NDT – why used in industry, describe test to
detect internal flaws.
Q3 heat treatment & iron carbon
• 2012• Describe – Annealing, normalising, carburising• Describe the flame hardening shown & use,• Name different regions of graph – describe
eutectic and eutectoid
Q3 Heat treatment & Iron Carbon
• 2011• Describe Induction hardening - distinguish
grey & white cast iron – explain stress relieving in metals
• Name different regions of graph – outline cooling 0.4% steel from 900 degrees c
• Identify pyrometer and state function – describe how it works using the pictures,
Q3 heat treatment & iron carbon
• 2010• Compare Soaking & water cooling –
distinguish optical & thermo electric pyrometer – describe normalising
• Name different regions of graph – describe martinsite
• Describe heat treatment for slideways – describe this process
Q3 heat treatment & iron carbon
• 2009• Id 3 quenching media used in heat
treatments- discuss safety in case hardening, discuss induction hardening, what is pearlite,
• Id heat treatment processes as temp zones A,B,C,- explain Allotropy,
• Id pyrometer (thermo electric) – how does it work,
Q3 heat treatment & iron carbon
• 2008• Eutectic vrs eutectoid point, one method
measuring furnace temp, compare microstructures martensite & ferrite, explain recrystallisation in heat treatment
• Name different regions of graph – outline cooling 0.4% steel from 900 degrees c
• Describe pack carburising, outline flame hardening,
Q3 heat treatment & iron carbon
• 2007• 2 methods measuring furnace temperature,
describe allotropy, explain soaking in annealing, difference between grey and white cast iron,
• Name different regions of graph – describe eutectic and eutectoid (2012)
• Name 3 quenching media in terms of speed of cooling, outline induction hardening,
Q3 Heat treatment & Iron Carbon
• 2006• Select two temp zones on the dwg & explain
the treatment processes they represent,• Compare – ferrite & martensite, upper and
lower critical temp, stainless steel & high speed steel, eutectic & eutectoid point
• Optical pyrometer – id & state its function and how it works,
Q5 Welding
• 2012• Describe S.A.W. & where used• Describe Colour coding oxyacetylene equip – 3
safety precautions preparation equip & materials
• Describe multi run welds• Describe auto welding of car panels,• Describe main features of TIG & MMA
Q5 Welding
• 2011• Describe MMA – identify & state function of
the MMA circuit,• How minimise electrical hazards in MMA – 3
ways to prevent atmospheric contamination – why TIG for Aluminium – Function of Dissolved acetylene,
• Describe Seam welding & SAW
Q5 Welding
• 2010• Name TIG & MIG – name application for each
and how they work,• State (oxyacetylene equip) – 3 safety
precautions integrated into the equip – 2 functions of slag in MMA – Use for SAW, Describe resistance welding
• Describe Electro-slag welding & oxyacetylene• Or outline why robots for spray painting –
testing pipes or placing electronic parts,
Q5 Welding
• 2009• Id Seam & spot welding, describe how they work• Distinguish MIG & TIG - state 2 functions of
electrode coating in MMA – 2 factors when installing a welding station in school – describe multi run welds,
• Describe transformer circuit in MMA, S.A.W.• Or advantage using air to power robots for
assembly – benefits using robotic control for hazardous environments
Q5 Welding
• 2008• Describe TIG using name, how it works, uses• Oxyacetylene – 2 safety features in the equip,
explain two parts of the gauges, whats dissolved acetylene, difference oxydising & carburising flames
• Describe main features of spot welding & MIG• Or 2 industrial uses where robots are used,
advantages of stepper motors in robots
Q5 Welding
• 2007• SAW – Describe how it works and where used• Redraw incomplete transformer circuit,
describe function of a & b, advantages multi run welds, 3 safety precautions preparing materials for welding
• Describe seam welding & electro slag welding• Or 2 safety factors setting up robotic welding
facility,
Q5 Welding
• 2006• MIG welding, name it , how it works, where its
used,• MMA – 2 functions of electrode, 2 important
functions of the slag, explain bridge rectifier, know 3 safety hazards and remedy for each,
• Describe spot welding & TIG• Or benefits robots in car assembly, what is
‘working envelope’
Q6 Polymers
• 2012• Describe compression moulding, polymer
used, and a component• Distinguish thermo & thermosetting using
polymerisation process, bonding, structure, properties
• Explain – elastomer, catalyst, blow moulding, G.R.P. Laminate
Q6 Polymers
• 2011• Describe Addition polymerisation, name a
material,• Describe extrusion, state polymer, name
component• Explain – Plasticiser, Filler, Lubricant, stabiliser,
pigment
Q6 Polymers
• 2010• Identify calarindering and describe how it works
– name one part produced• Distinguish thermo & thermosetting using
bonding, structure, properties (same as 2012)• Explain – stabiliser, glass transition temp,
condensation polymerisation, elastomer, elastic memory in perspex
Q6 Polymers
• 2009• Id Calandering & extrusion, id one component,
describe how they work,• Describe polymerisation for polyethylene• Explain, Blow moulding, Elastomer, Catalyst,
Co –polymer, Thermosetting plastic,
Q6 Polymers
• 2008• Extrusion–id function of 3 part, id a component• Distinguish thermo & thermosetting using
polymerisation process, bonding, properties (2012)• Explain Transfer moulding, GRP, Cross linking,
Laminate, Polymer filled materials
Q6 Polymers
• 2007• Id & describe how transfer moulding works , name
1 component,• State function of pigments, plasticisers, lubricants• Explain condensation polymerisation, extrusion,
elastomers, van der walls forces, monomer,
Q6 Polymers
• 2006• Distinguish thermo & thermosetting using
polymerisation process, bonding, internal structure, properties, (2008)
• State function of fillers, stabilisers, catalyst, foaming agent
• Describe injection moulding process, how it works, one part produced, name some parts.
Q8 mechanisms
• 2012• Describe ball bearings, vee belt pulleys• Explain – idler gear, car batteries, ratchet &
pawl mechanism, heat sink in electronics, advantages of solar panels,
• Describe method of independent drive to each wheel of moon buggy
• Or electronics question
Q8 mechanisms
• 2011• Describe bevel gears & roller bearings• Explain vee pulleys, chain & sprocket, toggle,
LDR, function electronic transistor,• Describe mechanism to control steering of go-
kart,• Or electronics question
Q8 mechanisms
• 2010• Identify Universal joint & cam shaft and cams• Explain bevel gears, double acting cylinder,
clutch, idler gear, capacitor,• Describe mechanism to control up & down
dentists chair,• Or electronics – id circuit diagram
Q8 mechanisms
• 2009• Id socket set ratchet & timing belt, suggest use• Explain helical gears, preventing slip in pulley
belt system, crank & slider, integrated circuit, solenoid,
• Describe mechanism to rotate jewellery box• Or id & describe function of the electronic
components
Q8 mechanisms
• 2008• Id and use for bevel gears & ball bearing• Explain electrical relay, clutch, shuttle valve,
rack & pinion, capacitor,• Describe a mechanism to lift heavy loads• or id & describe function of the electronic
components
Q8 mechanisms
• 2007• Id rack & pinion & worm gears, state where
used• Explain Idler gears, Universal joint, solenoid,
pneumatic flow regulator, solar panel,• Describe mechanism to automatically open a
door• Or id & describe function of the electronic
components
Q8 mechanisms
• 2006• Id Timing toothed belt & cam and follower and
give an application,• Explain compound gear train, advantage gears
over pulleys, outline function of idler gear, outline between bevel and worm gears, describe 2 uses of rack and pinion mechanism
• Describe the operation of a power hacksaw• Or id & describe function of the electronic
components,