- As per electricity regulation in a mine the length of flexible Conductivity of largest conductor of the cable
- 25% of Conductivity of largest conductor of the cable
- 50% of Conductivity of largest conductor of the cable
- 50% of Conductivity of all power conductors taken together
Conductivity of metallic covering of a cable (other than flexible cable for portable/transportable apparatus) used in a mine shall not be less than 50% of Conductivity of largest conductor of the cable at all parts & at all joints
- Manager , Engineer , Electrical Supervisor
- Agent .Manager .Engineer
- Owner ,Agent .Manager ,Engineer
- Owner ,Agent .Manager ,Engineer, Electrical Supervisor ,Asst.manager ,Over man ,Mining Sardar & All other persons connected with use of electricity
- All of the above
Owner ,Agent .Manager ,Engineer, Electrical Supervisor ,Asst.manager ,Over man ,Mining Sardar & All other persons connected with use of electricity responsible for observance of provision of CEA 2010(Measures relating to safety & electric supply).
- 10 m
- 12 m
- 15 m
- 20 m
Clearance of overhead electrical line above ground where dumpers cross should not be less than 12 m.
- 1 ampere
- 2 ampere
- 4 ampere
- 5 ampere
- 3 ampere
- None of these
For safety of mine electrical system earth pit resistance shall be kept limited to 1 Ampere.
- It shall be earthed
- It shall be electrically discharged
- Any adjacent conductor/apparatus shall be earth/discharged
- All of the above
- Only A
Before any conductor/apparatus is handled It shall be earthed It shall be electrically discharged Any adjacent conductor/apparatus shall be earth/discharged
- Hindi
- English
- Hindi & English
- Local language
- Hindi & English/ Local language
Every pole/tower of overhead lines exceeding 650 volts, which can be easily climbed upon without the aid of ladder/special appliances is to be provided with a danger notice in Hindi & English/ Local language
- Phase to Phase
- Phase to Earth
- Both of the above
- Only A
- Only B
Voltage means difference of potential Phase to Phase and Phase to Earth
- Portable Apparatus
- Transportable apparatus
- Mobile machine
- Heavy Earth Moving Machine
As per CEAR 2010 Electric Shovel is a Portable Apparatus
- Reducing heating effects in equipment
- Reduced stresses in circuits/equipments carrying fault current
- Reduced shock , burn & fire hazards
- All of the above
Restricted Neutral System of power supply in mines has the advantage of Reducing heating effects in equipment Reduced stresses in circuits/equipments carrying fault current Reduced shock, burn & fire hazards
- Once in 4 months
- Once in 3 Months
- Once in 6 months
- Once in a year
- None of these
Switch gear & protective equipments shall be checked Once in 3 Months
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