Registered Master Electrician (RME) board exam reviewer
A general average of at least 70%, with no subject below 50%. (RA 7920). Practise each subject with worked solutions, then sit a timed mock exam and see where you stand against that rule.
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Subjects, weights and topics
| Subject | Weight | Topics |
|---|---|---|
| Technical Subjects 4 h session | 50% | DC circuits · AC circuits · Three-phase systems · Tools and test equipment · Transformers · Induction motors · Motors, starters and control circuits · Illumination · Protection: fuses, breakers, relays · RA 7920 and ethics (electrical) |
| Philippine Electrical Code, Parts 1 and 2 4 h session | 50% | PEC Part 1: general requirements · PEC: wiring methods and materials · PEC: branch circuits, ampacity and protection · PEC: grounding and bonding · PEC: special occupancies and equipment |
Sample questions
1. A 20 m² room is lit by 4 lamps of 2500 lm each. The coefficient of utilization is 0.5 and the maintenance factor is 0.8. What is the average maintained illuminance on the work plane?
- 500 lx
- 250 lx
- 50 lx
- 200 lx
Show the answer and solution
Answer: D. 200 lx
E = N Φ CU MF/A = 4 × 2500 × 0.5 × 0.8/20 = 200 lx.
2. A wye-connected supply has 380 V between lines. What is the line-to-neutral voltage?
- 658.2 V
- 126.7 V
- 190 V
- 219.4 V
Show the answer and solution
Answer: D. 219.4 V
In wye VL = √3·Vph, so Vph = 380/√3 = 219.4 V.
3. A motor has a nameplate full-load current of 20 A and a marked service factor of 1.15. What is the maximum rating of a separate overload device under the basic rule?
- 23 A
- 25 A
- 20 A
- 28 A
Show the answer and solution
Answer: B. 25 A
For motors with a service factor of 1.15 or more, the overload device may be rated up to 125% of nameplate FLC: 1.25 × 20 = 25 A. A 115% limit applies to other motors.
Reference: PEC 2017 Part 1, Art. 4.30 (Motors: overload protection)
4. A continuous load draws 16 A. What minimum branch-circuit rating does the 125% rule require?
- 20 A
- 16 A
- 12.8 A
- 24 A
Show the answer and solution
Answer: A. 20 A
A continuous load (3 hours or more) is sized at 125%: 16 × 1.25 = 20 A minimum.
An independent, free reviewer: not affiliated with the PRC or the Boards. Subject weights and passing rules are from the PRC examination programs and the laws (RA 9292, RA 7920); check the current PRC program before you file. Code questions follow the Philippine Electrical Code 2017 Part 1; check them against your own copy of the Code.