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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

Q) As per CEAR 2010 Electric Shovel is a?

  1. Portable Apparatus
  2. Transportable apparatus
  3. Mobile machine
  4. Heavy Earth Moving Machine

As per CEAR 2010 Electric Shovel is a Portable Apparatus

Q) Restricted Neutral System of power supply in mines has the advantage of.

  1. Reducing heating effects in equipment
  2. Reduced stresses in circuits/equipments carrying fault current
  3. Reduced shock , burn & fire hazards
  4. 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

Q) Switch gear & protective equipments shall be checked?

  1. Once in 4 months
  2. Once in 3 Months
  3. Once in 6 months
  4. Once in a year
  5. None of these

Switch gear & protective equipments shall be checked Once in 3 Months

Q) In restricted earth neutral system of power supply for voltage exceeding 1.1 KV (1100 Volts) & up to 11 KV in O/C mines should be limited?

  1. 750 mill ampere
  2. 50 mill ampere
  3. 75 mill ampere
  4. 50 ampere
  5. 5 ampere

In restricted earth neutral system of power supply for voltage exceeding 1.1 KV (1100 Volts) & up to 11 KV in O/C mines should be limited to 50 ampere

Q) Where a fault including an earth fault current shall not be more than________________in installation of voltage exceeding_____________?

  1. 650 mill ampere/250 volts
  2. 550 mill ampere/250 volts
  3. 750 mill ampere/200 volts
  4. 750 mill ampere/250 volts

Where a fault including an earth fault current shall not be more than 750 mill ampere in installation of voltage exceeding 250 volts

Q) Plans (CEAR 2010) showing on scale?

  1. 1:4000 (25 cm to a km)
  2. 1:2000 (21 cm to a km)
  3. 1:4000 (50 cm to a km)
  4. 1:3000 (25 cm to a km)

1:4000 (25 cm to a km)

Q) Plans (CEAR 2010) showing?

  1. Position of all fixed apparatus
  2. Conductors
  3. Telecommunication / Signalling apparatus / Cables
  4. All of the above
  5. B & C
  6. A & C

All of the above plans need to show.

Q) Voltage exceeding 33 KV the clearance above ground should not be less than ______for every__________volts provided that the minimum clearance along/across any street shall not be less than 6.1 m?

  1. 1m+0.3m / 33000 Volts
  2. 2m+0.5m / 3300 Volts
  3. 2m+0.3m / 33000 Volts
  4. 1m+0.3m / 11000 Volts

Voltage exceeding 33 KV the clearance above ground should not be less than 2m+0.3m for every 33000 volts provided that the minimum clearance along/across any street shall not be less than 6.1 m?

Q) Voltage exceeding 11000 volts but not exceeding 33 KV?

  1. Elsewhere Along/Across 4.6 m
  2. Elsewhere Along/Across 4.0 m
  3. Elsewhere Along/Across 5.2 m
  4. Elsewhere Along/Across 6.5 m

Voltage exceeding 11000 volts but not exceeding 33 KV Elsewhere Along/Across 5.2 m

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