Prepare for Hong Kong Grade A or Grade B electrical work by choosing the appropriate exam route, then identifying what you need to revise. This page combines official route guidance, original practice and calculation tools. The five foundation questions are not official exam questions or a complete mock exam.
Try the five questions and calculators ↓
Choose your Grade A or Grade B route
Grade A: Trade Test for Grade A Electrical Work
The Construction Industry Council provides the Grade A trade test. A test certificate, together with the relevant qualifications and experience, can support an application to EMSD for registration. Passing the test and receiving electrical worker registration are separate steps.
Read the existing Grade A guide (Traditional Chinese) · Official CIC test information
Grade B: Examination for Registration as a Grade B Electrical Worker
The HKEAA Grade B examination is a different route. Successful candidates applying for registration must still meet the practical electrical work experience requirements, subject to EMSD assessment. Prepare against the Grade B syllabus; Grade A practice is not a complete Grade B mock.
HKEAA Grade B examination and syllabus · EMSD registration requirements
Use the practice to find your next revision step
- Calculate independently before selecting an answer. Check it, then read the working.
- Identify errors in the formula, units or algebra, then retry the questions you missed.
- Change a value in the calculator and check how the result changes.
The three-phase calculator uses line quantities and assumes a balanced, sinusoidal load. Understand those conditions before comparing line and phase quantities. The output is not an installation design.
Route sources checked on 1 October 2026. Check official announcements for current dates and requirements. This page does not provide a complete Grade B mock.
