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Q) When two/more conductors of a flexible cable are joined why the joints should be widely separated .

  1. So that the joints are not touch one another & there is no chance of short circuiting
  2. To keep thickness of flexible cable uniform
  3. To preserve flexibility
  4. All of the above

When two/more conductors of a flexible cable are joined To preserve flexibility the joints should be widely separated

Q) Flexible cable for portable apparatus shall have metallic screening on?

  1. Power cores
  2. Earth cores
  3. Pilot cores
  4. Power cores & Pilot cores
  5. None of the above

Flexible cable for portable apparatus shall have metallic screening on Power cores & Pilot cores

 

Q) cable with any portable & transportable apparatus shall not exceed?

  1. 90 m
  2. 100 m
  3. 150 m
  4. 200 m
  5. None of these

cable with any portable & transportable apparatus shall not exceed 100 m

Q) Conductivity of metallic covering of a cable (other than flexible cable for portable/transportable apparatus) used in a mine shall not be less than at all parts & at all joints?

  1. As per electricity regulation in a mine the length of flexible Conductivity of largest conductor of the cable
  2. 25% of Conductivity of largest conductor of the cable
  3. 50% of Conductivity of largest conductor of the cable
  4. 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

Q) Who is responsible for observance of provision of CEA 2010(Measures relating to safety & electric supply)?

  1. Manager , Engineer , Electrical Supervisor
  2. Agent .Manager .Engineer
  3. Owner ,Agent .Manager ,Engineer
  4. Owner ,Agent .Manager ,Engineer, Electrical Supervisor ,Asst.manager ,Over man ,Mining Sardar & All other persons connected with use of electricity
  5. 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).

Q) Clearance of overhead electrical line above ground where dumpers cross should not be less than?

  1. 10 m
  2. 12 m
  3. 15 m
  4. 20 m

Clearance of overhead electrical line above ground where dumpers cross should not be less than 12 m.

Q) For safety of mine electrical system earth pit resistance shall be kept limited to _____

  1. 1 ampere
  2. 2 ampere
  3. 4 ampere
  4. 5 ampere
  5. 3 ampere
  6. None of these

For safety of mine electrical system earth pit resistance shall be kept limited to 1 Ampere.

Q) Before any conductor/apparatus is handled?

  1. It shall be earthed
  2. It shall be electrically discharged
  3. Any adjacent conductor/apparatus shall be earth/discharged
  4. All of the above
  5. 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

Q) 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?

  1. Hindi
  2. English
  3. Hindi & English
  4. Local language
  5. 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

Q) Voltage means difference of potential?

  1. Phase to Phase
  2. Phase to Earth
  3. Both of the above
  4. Only A
  5. Only B

Voltage means difference of potential Phase to Phase and Phase to Earth

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