EMA Electrician Licence Written Assessment — Information & Free Practice

About EMA Electrician Licence Written Assessment

EMA Electrician Licence Written Assessment · SG

Key exam facts

Provider

Energy Market Authority (EMA), Singapore, administers the Electrician Licence written assessment and assigns the available written-assessment slot through its ELISE licensing process.

Format

Written knowledge assessment comprising 60 multiple-choice questions in domestic installations, industrial installations and legislation, plus 4 structured questions on electrical drawings and designs. The later practical test and technical assessment interview are separate and excluded.

Exam questions

Total questions: 64.

Time limit

3 hours for the written test.

Passing score

At least 50% overall, provided that the candidate obtains at least 75% in Section E (Regulation). The five sections carry 240 marks in total.

Exam fee

S$50 non-refundable licence application fee. A separate S$30 licence fee is payable only after approval and passing the assessments. EMA does not identify a separate written-test fee in its published application-fee information.

Topics covered

• Electricity Act and relevant Electricity Regulations (31.25%)

  • Definitions in the regulations
  • Authority conferred by license under different classes of Licensed Electrical Workers
  • Responsibility of holder of each class of licence
  • Connection of electrical installation to supply line
  • Modification to electrical installation / supply installation
  • Compliances on testing of electrical installation / supply installation
  • Person responsible for electrical installation / supply installation

• Domestic and Industrial Installations (68.75%)

  • Understanding the design of single line diagram (SLD)
  • Purpose of each electrical symbol in the SLD. Able to identify the symbol conventions and functions used in the protective devices, such as MCB, RCCB… etc.
  • Typical arrangement of incoming protective devices, outgoing protective devices, external protection devices, measuring instruments, indicating lights…etc. in a circuit.
  • Able to design a SLD for small installation (up to 45kVA)
  • Design of an electrical installation
  • Able to calculate maximum demand based on domestic/industrial design requirements
  • Calculate protective devices’ rating
  • Calculation and selection of cable size
  • Application of correction factors for ambient temperature, grouping, insulation, harmonics etc.
  • Selection of wiring installation, enclosure, cable conduits, trunking, cable trays …etc.
  • Calculation of voltage drop in electrical circuits, maximum voltage drops allowance and acceptable limits, methods to reduce voltage drops
  • Segregation of different circuits due to voltage limits, types of loads, mutual interference
  • Protection against electric shock
  • Types of electrical shocks (direct contact, indirect contact)
  • Protective measures to prevent electric shock and its applications
  • Application of basic protection and fault protection
  • Physiological effect of electric current
  • Calculation of touch voltage
  • Sensitivity of RCCB (nuisance tripping etc.)
  • Earthing and bonding
  • Types of Earthing systems (TN-S, TT etc.)
  • Bonding in the protection against electric shock
  • Purpose of earthing
  • Purpose of bonding
  • Earthing and bonding connection methods
  • Identifying extraneous conductive parts
  • Alternating Current (AC) and Direct Current (DC) supplies
  • Voltage levels in Singapore
  • Application of ohm’s law, Kirchhoff’s laws, Thevenin’s theorem, electrical quantities in mean and r.m.s. value in circuits
  • relationship between three phase line current and phase current and relationship between three phase line voltage and phase voltage
  • Generation of Direct Current (DC) electricity, conversion of electricity from AC to DC, DC to AC, principles of solar PV, battery supply
  • harmonics due to non-linear loads
  • colour code identification for single phase AC, three phase AC and DC cables
  • power factor in electrical circuits, power factor correction methods, problems due to low power factors
  • Principles of operation of rotating machines, AC and DC machines
  • Characteristics of motor starting methods (direct-on-line, star-delta, soft starter)
  • Control diagram of motor control circuits, interlocking, start-stop control, emergency stop, sequential starting, use of PLC, relays and contactors
  • trouble shooting of machines, abnormal humming sound, machines stalled, machines cannot be started
  • Able to calculate real, apparent and reactive power of a motor
  • Principles and operation of small generator
  • Generator protection
  • Generator installation
  • Pre-commissioning and turn-on inspection & test
  • Types of the commissioning tests and the purpose of each test
  • Visual Inspection
  • Earth resistance test
  • Insulation resistance test
  • Phasing and polarity test
  • Continuity test
  • Earth loop impedance test
  • RCCB test
  • MCCB trip test
  • Voltage measurement
  • Use of common test instruments
  • Operation, testing and maintenance of small electrical installation
  • Tests after supply turn-on
  • Electrical safety requirements for temporary electrical installation, SOA

How to prepare

Work through the topics, read the explanation after each answer, and revisit the areas where you miss questions. Use the official outline and reference materials below to guide your study.

These independent practice questions are not actual exam items and do not guarantee a passing result.

Frequently asked questions

Official sources and references

• EMA Additional Information for Application to become Licensed Electrician

  pp. 1–4, §3.1.1 Written Test Syllabus

• EMA Additional Information for Application to become Licensed Electrician

  p. 1, §3.1, Sections A–E

• EMA Additional Information for Application to become Licensed Electrician

  p. 1, §3.1

• EMA Electrician Licence

  Application Process, Steps 3–4

• EMA Electrician Licence

  Application and Licence Fees

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