The notes offer advice regarding the Irish Post-Primary Junior Certificate Technical Graphics examination. These notes are intended for study purposes only. Not all of the syllabus areas are represented in these notes.
2. • A. EXAM GUIDANCE [GENERAL]
1. FORMAT
2. TIMING
3. SUGGESTED APPROACH
• B. SHORT QUESTIONS
1. 2013 – 2016
• C. LONG QUESTION: LEARNING AREAS
1. FIRST PRINCIPLES (MULTIPLE AREAS)
2. ORTHOGRAPHIC PROJECTION WITH AUXILIARY
3. ROTATION OF OBJECTS
4. AXONOMETRIC PROJECTION
5. ISOMETRIC SCALE
6. DEVELOPMENT OF SURFACES / SOLIDS IN CONTACT
7. TRANSFORMATION GEOMETRY
8. ELLIPSE & PARABOLA
9. CIRCLES IN CONTACT
• *NOT ALL SHORT QUESTION AREAS ARE COVERED IN THESE NOTES SO REFER TO EXAMPLES AS DONE IN
CLASS AND IN EXAM PAPERS I.E. SKETCHING, TERMINOLOGY, C.A.D. COMMANDS, BAR/PIE/LINE
CHARTS/GRAPHS ETC…
CONTENTS
4. EXAM GUIDANCE
• FORMAT:
EXAM DURATION
HIGHER LEVEL = 3 HOURS
ORDINARY LEVEL = 2.5 HOURS
EXAM PAPER STRUCTURE
TWO SECTIONS IN EXAM PAPER
SECTION A = MIXED TOPIC SHORT QUESTIONS
FIFTEEN SHORT QUESTIONS (ANSWER ANY TEN – TRY ALL)
SECTION B = LONG QUESTIONS
SIX LONG QUESTIONS (ANSWER ANY FOUR) SEE TABLE BELOW
TG PAPER SECTION B: LONG QUESTIONS
QUESTION HIGHER LEVEL ORDINARY LEVEL
1 ORTHOGRAPHIC PROJECTION ORTHOGRAPHIC PROJECTION
2 ROTATION OF OBJECTS ELLIPSE
3 AXONOMETRIC/ ISOMETRIC SCALED DEVELOPMENTS
4 SOLIDS IN CONTACT & DEVELOPMENTS OBLIQUE & ISOMETRIC GRID DRAWING
5 TRANSFORMATION GEOMETRY TRANSFORMATION GEOMETRY
6 ELLIPSE, PARABOLA & CIRCLES IN CONTACT CIRCLES IN CONTACT
5. EXAM GUIDANCE
• TIMING:
HIGHER LEVEL
3 HOURS (180 MINUTES)
SPEND 3 TO 5 MINUTES PREVIEWING EXAM PAPER AT START
SECTION A: RECOMMENDED TIME = 45 MINUTES MAX [35 MINUTES OR LESS WOULD BE
IDEAL]
SECTION B: RECOMMENDED TIME = 130 MINUTES MAX (32.5 TO 35 MIN/QUESTION)
KEY TIP: WHEN STUDYING, GET INTO THE HABIT OF DOING QUESTIONS RELATIVE TO THE
TIMING SUGGESTED. WHEN IN THE EXAM, HAVE TIME QUES OR BE VIGILANT OF TIME
DURING THE EXAM TO REMIND YOU TO PROGRESS FROM ONE QUESTION TO ANOTHER.
ORDINARY LEVEL
2.5 HOURS (150 MINUTES)
SPEND 3 TO 5 MINUTES PREVIEWING EXAM PAPER AT START
SECTION A: RECOMMENDED TIME = 25 TO 30 MINUTES MAX
SECTION B: RECOMMENDED TIME = 120 MINUTES MAX (30 MIN/QUESTION)
KEY TIP: WHEN STUDYING, GET INTO THE HABIT OF DOING QUESTIONS RELATIVE TO THE
TIMING SUGGESTED. WHEN IN THE EXAM, HAVE TIME QUES OR BE VIGILANT OF TIME
DURING THE EXAM TO REMIND YOU TO PROGRESS FROM ONE QUESTION TO ANOTHER.
6. EXAM GUIDANCE
• SUGGESTED APPROACH: BE ‘SMART’…
DON’T PANIC, EASY FOR ME TO SAY BUT REALLY DON’T PANIC. THE EXAM PAPER WILL
LOOK DIFFERENT BECAUSE ALL OF THE QUESTIONS ARE NEW AND PREVIOUSLY UNSEEN.
TAKE A MINUTE TO RELAX AND THEN CONFIRM TO YOURSELF THAT YOU ARE REFINED IN
THE METHODS /UNDERSTANDING TO ANSWERING SUCH QUESTIONS. REMEMBER THAT
YEAR ON YEAR THE FACE OF THE QUESTIONS MAY CHANGE BUT THE DETAIL IS THE SAME,
THE METHODS ARE CONSISTENT AND THERE IS A LOGICAL SEQUENCE TO BE FOLLOWED IN
ALL CASES.
UPON REVIEW OF EXAM PAPER, MARK THE QUESTIONS YOU FEEL MOST CONFIDENT
ABOUT DOING
DO SECTION ‘A’ FIRST AND BEGIN WITH WHATEVER QUESTION YOU FEEL YOU CAN
ANSWER BEST. MAKE SURE YOU HAVE ATTEMPTED AT LEAST 10 SHORT QUESTIONS
THOUGH I DO RECOMMEND THAT YOU DO ALL FIFTEEN IF POSSIBLE.
MOVE ONTO SECTION ‘B’ AND AGAIN BEGIN WITH YOUR STRONGEST QUESTION, I.E. THE
ONE YOU KNOW YOU CAN DO BEST IN THE LEAST AMOUNT OF TIME!
BE MINDFUL OF TIME…AS PREVIOUSLY MENTIONED.
IN ALL CASES, REMEMBER TO DOUBLE CHECK WHAT THE QUESTION IS ASKING YOU. IT IS
NOT UNCOMMON TO PRESUME SOMETHING OR OVERLOOK SOMETHING. BE DILLIGENT
HERE.
IF ALL ELSE FAILS JUST HAVE A GO. IT CAN DO NO HARM TO HAVE A GO.
IF YOU HAVE TIME AT THE END, SPEND IT BY REVIEWING THE WORK YOU HAVE DONE OR
TIDYING UP/FINISHING INCOMPLETE QUESTIONS
DO NOT LEAVE THE EXAM HALL WITHOUT HAVING ATTEMPTED THE REQUIRED
AMOUNT OF QUESTIONS TO THE BEST OF YOUR ABILITY.
7. EXAM GUIDANCE
MAKE SURE YOU HAVE ALL OF THE
REQUIRED DRAWING EQUIPMENT
WITH YOU FOR THE EXAM!!!
CHECKLIST
5H/2H/HB PENCILS
PENCIL PAIRER & RUBBER
MASKING TAPE/PAGE CLIPS
CALCULATOR (IF NEEDED)
BOW COMPASS (BRING SPARE COMPASS LED AND SAND PAPER)
45° AND 60° SET-SQUARES (ADJUSTABLE SET-SQUARE TOO IF DESIRED)
PROTRACTOR AND CIRCLE TEMPLATE
T-SQUARE
21. FIRST PRINCIPLES
3
DIVIDING A LINE INTO AN EQUAL NUMBER OF PARTS
https://www.youtube.com/watch?v=X_d61-dz9nY
1
2
3
A B
A B
A B
1
2
A B
3
1
2
A B
3
1
2
A B
1.
2.
6.
3.
5.
4.
24. AREAS, ENLARGEMENT & REDUCTION
Enlarge from ‘O’ to ‘A1’
Reduce irregular pentagon to
scale of 2:3
Enlarge to 125mm length
Inscribe square of maximum
size into given triangle
32. STANDARD AUXILIARY PROJECTION
AUXILIARY ELEVATION
AUXILIARY PLAN
AUXILIARY ELEVATION:
PROJECT FROM PLAN AND TAKE
MEASUREMENTS FROM
ELEVATION
AUXILIARY PLAN:
PROJECT FROM ELEVATION AND
TAKE MEASUREMENTS FROM
PLAN
67. TRANSFORMATION GEOMETRY
RECOMMENDED STEPS:
1. READ THE QUESTION
2. POSITION START POINT IN TOP-LEFT AREA OF PAGE
3. DRAW THE FIGURE AND MAP OUT ALL POINTS,
NAMELY P, P1, P2, P3, P4, AS DIRECTED.
4. FOLLOW THE INSTRUCTION FOR THE ORDER OF
TRANSFORMATIONS AS OUTLINED IN THE QUESTION
1. P – P1 = AXIAL
2. P1 – P2 = CENTRAL
3. P2 – P3 = TRANSLATION
4. P3 – P4 = ROTATION CLOCKWISE 90°