Q7. The permissible voltage drop for a residential lighting circuit as per IE rules is:
A) 2%
B) 5%
C) 10%
D) 15%
✅ Answer: A
Q8. The size of a conductor for a 10 HP, 415V, 3-phase motor (efficiency 85%, PF 0.86) – approximate full load current is:
A) 8 A
B) 12 A
C) 15 A
D) 20 A
✅ Answer: C
(I = (10×746)/(√3×415×0.86×0.85) ≈ 14.8 A)
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The Sharjah Electricity, Water and Gas Authority (SEWA) registration exam for electrical engineers is a critical step for professionals seeking to work as Senior Engineers, Assistant Engineers, or Supervisors in Sharjah. The exam typically follows a specific format focused on Sharjah-specific electrical regulations and design principles. SEWA Electrical Engineer Exam Overview
Format: The updated exam format generally consists of a 100-mark paper divided into two main sections: Multiple Choice Questions (MCQs): Typically worth 60 marks.
Design/Practical Questions: Typically worth 40 marks, often involving wiring diagrams or single-line diagrams (SLDs).
Passing Criteria: A score of 70% is often required to qualify.
Key Focus: The exam heavily emphasizes the SEWA Electrical Installation Regulations and Sharjah-specific wiring standards. Sample Exam Questions
These questions are derived from SEWA-specific study materials and regulatory guidelines. Section 1: General Regulations & Standards
What is the nominal 3-phase and single-phase supply voltage from SEWA?
Answer: 415V (3-phase) and 240V (single-phase) with a tolerance of sewa electrical engineer exam questions pdf portable
What is the maximum number of 13A socket outlets allowed on a ring final circuit?
Answer: 10 sockets (generally restricted to a specific floor area like 100m2100 m squared
What is the minimum depth for laying cables underground in a sleeve pipe? Answer: 600mm.
Which circuit category is reserved for fire alarms and emergency lighting? Answer: Category 3 circuits. Section 2: Protection & Earthing What is the purpose of an Automatic Transfer Switch (ATS)?
Answer: To automatically transfer the load from a primary power source to a backup source (like a generator) during power failure.
Which earthing system uses separate conductors for neutral and protective functions? Answer: TNS system (offers better EMC properties).
What is the maximum allowable earth resistance for a main earth electrode in SEWA installations? Answer: 1.0 Ohm. Section 3: Calculations & Design What is the power dissipated by a resistor drawing a current of 3A? Answer: 18 Watts (
A 1/4th Coulomb of charge passes a point in 25 seconds. What is the current? Answer: 0.01A ( Key Study Topics Candidates should focus on these high-priority areas:
SEWA Wiring Regulations: Understanding the Official SEWA Connection Rules is mandatory.
Testing Before Energizing: Knowledge of continuity, insulation resistance, polarity, and earth electrode resistance tests.
Motor Protection: Methods such as over-current relays, motor protection relays, and transformer-based protection.
Design Documentation: Ability to prepare single-line diagrams (SLDs) and load distribution schedules for SEWA approval. Preparation Resources (PDF Guides) Several reputable platforms provide portable study guides: Ready to create a quiz
Question Banks: Comprehensive banks covering earthing, starters, and surge arresters are available on Scribd SEWA Question Bank.
Assistant Engineer Guides: A 15-page guide specific to the Assistant Engineer level can be found at Scribd Assistant Engineer Guide Regulatory Documents: The New SEWA Regulation Book 2017
serves as the primary technical reference for all exam questions. SEWA Electrical Engineer Exam Question Bank | PDF - Scribd
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Preparing for the SEWA (Sharjah Electricity, Water, and Gas Authority) electrical engineer exam involves mastering Sharjah-specific wiring regulations and core electrical engineering design. SEWA Exam Pattern (2025/2026)
The updated exam for electrical engineering registration typically follows this structure: Total Marks: 100.
Multiple Choice Questions (MCQs): 60 marks, covering electrical concepts and general technical knowledge.
Design Question: 40 marks, often requiring candidates to draw a Single Line Diagram (SLD) or layout following SEWA rules.
Duration: Usually 1 to 2 hours depending on the specific engineer grade. Core Topics for Review
SEWA Wiring Regulations: Understanding the specific nominal supply voltage (3-phase and single-phase) and permitted tolerances in Sharjah.
Protection Devices: Knowledge of ELCB, RCCB, MCCB, and CBCT+ELR+SHUNT TRIP ratings and applications, including specific requirements for underwater lights.
Earthing Systems: Comparisons between TNC, TNS, TNCS, and TT systems, and tests like Earth Electrode Resistance and Insulation Resistance. Only download or distribute exam materials that are
Load and Motors: Direct on-line starting limits for 3-phase motors in kW and maximum load allowed between phases.
Cable Installation: Standard cable sizes (XLPE/SWA/PVC/CU) and minimum depth for laying cables underground. Sample Review Questions
Supply Voltage: What is the nominal 3-phase and single-phase supply voltage from SEWA including tolerance?
Ring Circuits: What is the maximum number of 13A sockets allowed in a single ring circuit?
Protection: What is the specific ELCB rating mandated by SEWA for underwater light installations?
Earthing: What are the five critical tests required before energizing a new power installation? (e.g., Continuity, Polarity, Insulation Resistance).
Technical Terms: Define abbreviations like RMU (Ring Main Unit), ATS (Automatic Transfer Switch), and ECC (Earth Continuity Conductor). Study Materials and Portable PDFs
SEWA Regulations: The primary study document is the official SEWA Electrical Wiring Regulations guide.
Scribd Resources: You can find comprehensive "Question Banks" and "Exam Guides" for SEWA Engineers on Scribd - Question Bank and Scribd - Assistant Engineer Guide. These are often available as portable PDF downloads with a subscription. SEWA Exam Guide for Electrical Engineers | PDF - Scribd
Only download or distribute exam materials that are publicly released, permitted for reuse, or that you have rights to. Don’t use leaked or copyrighted test content illegally.
Q: According to SEWA distribution code, the maximum permissible voltage drop for a lighting circuit from the supply point to the farthest lamp is:
a) 1.5%
b) 2.5%
c) 3.5%
d) 5.0%
(Answers: 1-b, 2-c, 3-c, 4-c, 5-b)