2357-309 Electrical Principles
Introduction
The final GOLA exam that appears in the 2357 qualification is the 309 which introduces electrical science into the qualification. This is a large exam that covers a huge range of different areas and is by far the most difficult exam to pass.
Exam Breakdown
The exam is a 30 question multiple choice online exam broken down into several different sections with a 60 minute time limit. Exam revision for this subject can be purchased following the link below to Electrical Exams.
| Click the image for an exam revision simulator for the 2357-309 |  |
Revision List
The following items should form the mainstay of your revision time:
- Mathematical principles
- SI Units
- Mass and weight
- Measuring and test instruments
- Basic mechanics
- Force, work, power, energy, efficiency
- Electrical energy and power
- Electron theory
- Conductors and insulators
- Electrical cable construction and properties
- Current, voltage and resistance in series and parallel circuits
- Power
- Electromagnetism
- Magnetism and electricity
- Sine waves
- Generation of electricity
- Supply voltages
- Transformers
- Sources of electrical energy
- Effects of inductance and capacitance on an electrical circuit
- True power, apparent power and power factor
- Power factor correction
- Three phase supplies
- Balanced and unbalanced loads
- Single and three phase motors
- d.c. motors
- a.c. motors
- Motor starting and control
- Electrical components
- Circuit protection
- RCDs
- Applications and principles of lighting
- Principles of electrical heating
- Electronic components
- Semi-conductor devices
Note: The above list is not exhaustive, we recommend working through the syllabus on the C&G website to ensure you cover all the areas. The 309 has a massive amount of detail to it and is not a unit to take lightly with over 100 guided learning hours allocated to it. There are different approaches to the delivery of the unit, some centres will complete it as a unitised element, covering all the science in one go while others will look to spread the unit over the apprenticeship choosing to cover it in parts as they work through.
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