⚙️ 1. Boiler ka Purpose (Maqsad)
Boiler ka main kaam hai paani ko steam mein convert karna high pressure aur temperature pe.
Yeh steam use hoti hai:
- Fuel oil ko heat karne ke liye (taake viscosity kam ho jaye aur easily burn ho)
- Accommodation aur galley heating ke liye
- Fresh water generator ke liye (evaporator)
- Main engine aur auxiliary system ke preheating ke liye
- Sometimes cargo tank heating ke liye (agar oil tanker hai)
🔥 2. Boiler ki Need (Kyun zarurat hoti hai)
Ship pe temperature bohat low areas mein hota hai, aur fuel heavy hota hai (HFO) jise heat ki zarurat hoti hai.
Steam ke bagair:
- Fuel burn nahi karega sahi se
- Lubricating oil thick ho jata hai
- Fresh water generator kaam nahi karega
- Accommodation cold ho jata hai
- Is liye boiler ship ke daily operation ka essential part hai.
⚡ 3. Electrician ki Responsibilities Boiler ke Liye
Electrician ka kaam mainly electrical control aur automation system pe hota hai, not the steam system directly.
Electrician ki responsibilities yeh hoti hain:
- Boiler Control Panel check karna (indicators, alarms, power supply).
- Burner motor, feed pump motor aur fan motor ka maintenance aur insulation check karna.
- Level sensors, temperature sensors, pressure switches ki wiring aur calibration ensure karna.
- Automatic start/stop system ka function test karna.
- Safety interlocks jaise flame failure, high pressure cut-out, low water level alarm check karna.
- Boiler ke heating elements (agar electric boiler ho) inspect karna.
- Boiler ka control circuit diagram samajhna aur fault finding karna.
🧰 4. Electrician ki Duties (Rozmarra ka kaam)
Daily / Weekly Duties:
- Control panel aur relays inspect karna.
- Alarm testing (flame failure, low water, over temp).
- Flame sensor / photocell clean karna.
- Motor insulation resistance megger se check karna.
- Connection terminals tightness aur overheating check karna.
- Logbook maintain karna (alarms, trips, faults, repairs).
🧠5. Electrician ko Kya Pata Hona Chahiye
Electrician ko boiler ke basic operation sequence samajhna chahiye:
- Pre-purge by fan motor
- Ignition start
- Flame detection
- Steam pressure control (cut-in/cut-out)
- Safety shutdowns
Aur yeh bhi samajhna chahiye:
- Flame sensor kis principle pe kaam karta hai (UV/IR)
- Feed water level control float switch ya probe system kaam kaise karta hai
- Pressure switch aur thermostat connections
- Boiler automation logic (sequence control relay ya PLC-based)
💡 6. Important Interview Questions for Electrician (Boiler related)
Yeh kuch common questions hain jo marine electrician interview mein pooche ja sakte hain:
| Question | Short Answer Idea |
|---|
| Boiler ka main function kya hai? | Steam banana for heating aur other systems. |
| Flame failure alarm ka reason kya ho sakta hai? | Flame sensor dirty, fuel not igniting, UV cell faulty. |
| Low water level alarm kaam kaise karta hai? | Float switch ya conductivity probe detect karta hai water level. |
| Boiler trip hone ke bad kya check karte ho? | Power supply, control fuse, motor overload, sensors. |
| Boiler automatic system mein kya interlocks hoti hain? | Flame failure, low water level, high pressure, door open. |
| Feed pump motor trip hone pe kya effect hota hai? | Boiler low level ho jata hai, burner automatically stop ho jata hai. |
| Electrician flame detector ka test kaise karta hai? | Manual test button ya simulate flame by torch light. |
| Steam pressure control switch ka kaam kya hai? | Pressure maintain karta hai — cut-in / cut-out points set hotay hain. |
🧯 7. Safety Points
Electrician ko yeh safety cheezen zarur yaad rakhni chahiye:
- Boiler control panel pe kaam karte waqt isolation aur tag out zaruri hai.
- High voltage aur high temperature area hai — insulated gloves aur PPE pehna chahiye.
- Flame sensor ya burner system pe kaam se pehle fuel supply band kar dena chahiye.
- Boiler automation test hamesha Chief Engineer ya Duty Engineer ke supervision mein karna chahiye.
100 detailed interview Q&A about Boiler
✅ Boiler Basics
✅ Steam System
✅ Feed Water System
✅ Burner & Flame Control
✅ Safety Devices & Alarms
Download 100 Questions Answers about Boiler for Electrician / ETR / ETO interview.
