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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

Q) Voltage up to 11000 volts if Bar.

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

Voltage up to 11000 volts if Bar Elsewhere Along/Across 4.6 m

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