BTEB Electrician (EIM) Exam case studies
BTEB Electrician (EIM) Exam · Put your knowledge to work in context.
The BTEB Electrician (EIM) credential is a Bangladeshi technical trade qualification awarded through the Bangladesh Technical Education Board for people who install, maintain and repair electrical wiring and equipment. It suits trainees leaving a technical school or polytechnic electrician course, apprentices working under a licensed electrician, and practising helpers who want formal recognition of their skills. The BTEB Electrician (EIM) Exam case studies are 5 cases and about 2,437 words.
1RCD Tripping After a Kitchen Extension
A 230 V single-phase domestic installation has a 30 mA Type AC RCD protecting four final circuits: kitchen sockets, a ring final in the dining room, an outdoor lighting circuit, and an immersion heater. After a new dishwasher and a water heater were installed, the RCD trips intermittently, often at night and sometimes when nothing is switched on.
518 words, about 3 min2Cable Sizing for a Workshop Submain
A workshop is fed from a distribution board 38 m away by a three-core armoured cable clipped direct to a wall for 22 m, then in thermal insulation for 8 m, then in free air for 8 m. The load is a 400 V three-phase motor circuit drawing 45 A at full load with a starting current of six times full load for 8 seconds.
519 words, about 3 min3Motor Keeps Tripping Its Overload After a Rewind
A 15 kW, 400 V, three-phase, four-pole induction motor driving a conveyor is returned from a rewind. On restart it runs for about 12 minutes, then the thermal overload relay trips.
437 words, about 2 min4Neutral and Earth Combined in a Sub-board
During a periodic inspection of a small retail unit, you open a sub-distribution board fed from the main board by a four-core SWA cable. The sub-board has a separate earth bar, but you notice a short link between the neutral bar and the earth bar.
475 words, about 2 min5PLC-Controlled Pump Will Not Start After Sensor Replacement
A wastewater transfer pump is controlled by a PLC. The start condition is: high-level float AND low-level float NOT active AND no overload trip AND selector in AUTO.
488 words, about 2 min