CCEA GCSE · 分析與預測

2025 CCEA GCSE Engineering and Manufacturing 0009 Past Paper 分析與預測

CCEA GCSE Engineering and Manufacturing Unit 3 (GEM31) offers a well-balanced assessment across core engineering calculations, technical drawing/sketching, and manufacturing systems. Section A is tightly focused on the pre-release theme (bench-mounted pillar drill), integrating mechanical principles, sketching of tension mechanisms, and a 10-mark extended prose question on emerging technologies. Section B assesses broader syllabus components including pneumatics, moments, material properties, and stock yield calculations.

更新: 2026年8月31日

分析模擬試題

難度 2.8/5

總分

100

時間

120 分鐘

最高頻課題

New and Emerging Technologies & Mechanical Systems

分卷

Unit 3: Materials, Processes and Systems (GEM31): 100 分 · 120 分鐘

重點章節

New and Emerging Technologies · 18 分Electronic and Mechanical Components in Systems · 17 分Materials Calculations, Cost and Waste · 10 分Stress, Strain and Young's Modulus · 9 分Permanent and Semi-Permanent Joining Methods · 6 分

Assessment Structure & Difficulty Verdict

The CCEA GCSE Engineering and Manufacturing Unit 3 (GEM31) examination is a 2-hour paper weighted at 100 marks. The paper presents a moderate, highly accessible challenge (Difficulty Index: 2.8/5), provided candidates are thoroughly prepared for both mathematical calculations and technical sketching.

Where the Marks Lie

The paper is split evenly into two 50-mark sections:

Section A (Pre-Release Application): Heavily focuses on the pre-release context of the bench-mounted pillar drill. Key mark clusters reside in the 12-mark technical sketching question (Question 4: 2D, assembly, and exploded sketches of belt tensioning mechanisms), stress and strain mechanics (Question 3), and the 10-mark Quality of Written Communication (QWC) essay on emerging technologies (Question 5).
Section B (Core Theory & Applied Calculations): Tests a broad range of core engineering principles, including pneumatic circuits and control (Question 9), the Principle of Moments applied to a tower crane, material yield and wastage calculations (Question 10), and CAD technologies (Question 8).

Key Examiner Pitfalls & Common Errors

Candidates commonly drop preventable marks in the following areas:

Mathematical Rigour: Forgetting units in mechanical calculations or failing to convert diameter to radius when calculating cross-sectional area (\(A = \pi r^2\) or \(A = \frac{\pi d^2}{4}\)).
Stock Yield & Wastage: Failing to calculate rods per individual stock length before rounding, instead calculating total rod length divided by stock length without considering unusable offcuts.
Technical Sketching Quality: Producing vague 2D diagrams without showing exploded mechanical assembly details, locking fasteners, or clear functional annotations.
Pneumatic Circuitry: Misidentifying five-port two-position (5/2) directional control valves or confusing exhaust throttling with supply throttling.

Revision & Exam Strategy

Ensure mastery over standard formulaic questions (Stress \(\sigma = \frac{F}{A}\), Strain \(\epsilon = \frac{\Delta L}{L}\), Young's Modulus \(E = \frac{\sigma}{\epsilon}\), and Principle of Moments \(\sum M = 0\)). Practice freehand 2D and 3D exploded sketching with standard engineering annotations (labels, arrows, fasteners, materials). For extended response questions, use structured paragraphs contrasting workforce effects against production efficiency.

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練習此課題

圖表

章節分數分佈

快速找出最多分數集中在哪些課題，優先分配溫習時間。

題型分佈

比較不同題型佔分，了解試卷結構和答題比重。

Short Answer / Identification24 分 · 18 題
Calculations / Numerical Problem Solving18 分 · 6 題
Structured Explanation22 分 · 9 題
Technical Drawing / Sketching17 分 · 3 題
Extended Response (QWC)10 分 · 1 題
Short Structured Outline / Multi-part9 分 · 2 題

分數難度分佈

估算哪些分數屬基本分、進階分或高難度分。

80%屬較易或中等難度

較易: 35 分中等: 45 分較難: 20 分

歷年難度趨勢

比較歷年難度，判斷今年是否明顯偏難或偏易。

指令詞頻率

留意常見指令詞，避免答題方向錯配。

技能比重

顯示今屆試卷主要考核的能力比例。

溫習回報

氣泡越大代表越常重現；越高代表佔分越多，適合用來排溫習優先次序。

Mechanics Calculations (Stress, Strain, Moments)

15 分 · 難度 2.5 · 重現率 100%

Materials Calculations and Wastage Yield

9 分 · 難度 2.6 · 重現率 95%

Technical Sketching & Mechanism Design

16 分 · 難度 3.2 · 重現率 100%

New and Emerging Technologies (Extended Prose)

18 分 · 難度 3 · 重現率 90%

Pneumatic Systems & Circuit Logic

5 分 · 難度 2.7 · 重現率 85%

Joining Methods & Material Properties

9 分 · 難度 2 · 重現率 90%

時間與分數

比較每部分分數和建議作答時間，幫助安排考場節奏。

分分鐘

下年趨勢預測

整理下年較值得留意的課題，以及背後原因。

Smart Materials and Shape Memory Alloys85%

Smart materials was completely absent in this series and remains a mandatory core syllabus area frequently tested in Section B.

Pneumatic Logic Gates (AND/OR shuttle valves)80%

This paper only assessed a 5/2 valve and one-way flow restrictor; logic functions (shuttle valve, two-pressure valve) are overdue for assessment.

Gear Trains and Velocity Ratio Calculations80%

Pulley drives were featured prominently; gear ratios, compound gear trains, and mechanical advantage represent the alternating mechanical topic.

Heat Treatment and Material Hardening Processes75%

Changing material properties (annealing, case hardening, tempering) received only 1 mark in this paper and is heavily due in the next cycle.

累積分數階梯

曲線顯示逐題累積的分數，虛線為各等級的估算分界。看曲線在哪一題附近越過你的目標等級，就知道要穩答到第幾題、哪些題目決定升降級。

跨年度課題熱度

按年度比較課題熱度，找出常考或回歸機會較高的內容。

Jun 2023

Jun 2024

Jun 2025

Materials and Their Applications (Unit 3)

Materials Calculations, Cost and Waste (Unit 3)

Changing Material Properties and Finishing Techniques (Unit 3)

Development of the Chosen Solution (Unit 1: Design)

Electronic and Mechanical Components in Systems (Unit 3)

Manufacturing Processes (Unit 2: Production)

Quality Control (Unit 2: Production)

Technology Used in Engineering and Manufacturing (Unit 3)

Engineering and Manufacturing Costs (Unit 3)

Engineering and Manufacturing Production Methods (Unit 3)

考官重點

AI 推斷

常見失分位

Truncating mathematical formulas early or confusing diameter with radius when calculating area \(A = \pi r^2\).
Calculating required stock lengths by dividing total material directly without factoring in rod-by-rod kerf/wastage losses.
Providing single flat 2D outlines when the question explicitly demands 2D, assembly, and exploded annotated sketches.
In extended prose (Q5), listing generic technology bullet points rather than evaluating workforce impacts and manufacturing efficiency separately.

常見誤解

Believing a Factor of Safety is a physical safety device rather than the structural ratio of maximum yield strength to working stress.
Confusing malleability (ability to deform under compressive stress) with ductility (ability to deform under tensile stress/drawing into wire).
Assuming composite materials are single chemical alloys rather than distinct microscopic/macroscopic matrix and reinforcement phases.

失分原因

Failing to state correct units in Young's Modulus (N/mm²) and Moments calculations (N).
Omitting labels, exploded positioning lines, and standard fastener representations in Question 4 mechanism sketching.
Incomplete definitions for composite materials lacking explicit reference to combining two or more distinct materials with different properties.
Missing the OFR (Own Figure Rule) benefit by failing to show clear sequential mathematical workings.

等級 cut-off 估算

更新: 2026年8月31日

來源: CCEA

等級	分數	百分比
A*	—	90%
A	—	80%
B	—	70%
C*	—	65%
C	—	60%
D	—	50%
E	—	40%
F	—	30%
G	—	20%

Official grade boundaries published by CCEA.

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等級	分數	百分比
A*	—	90%
A	—	80%
B	—	70%
C*	—	65%
C	—	60%
D	—	50%
E	—	40%
F	—	30%
G	—	20%

等級	分數	百分比
A*	—	90%
A	—	80%
B	—	70%
C*	—	65%
C	—	60%
D	—	50%
E	—	40%
F	—	30%
G	—	20%

等級	分數	百分比
A*	—	90%
A	—	80%
B	—	70%
C*	—	65%
C	—	60%
D	—	50%
E	—	40%
F	—	30%
G	—	20%