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Q) The sial layer is rich in ____________.

  • Silica and aluminum
  • Silica and magnesium
  • Sulfur and arsenic
  • Sulfur and aluminum

(a) Silica and aluminum

Q) Which wave can travel through vacuum?

  • P-wave
  • S-wave
  • Rayleigh wave
  • Radio wave

(d) Radio wave

Q) The number of cycles a wave completes in one second is called?

  • time period
  • frequency
  • energy
  • wavelength

(b) frequency

Q) S- wave can travel through _____________

  • Only in solid
  • Only in liquid
  • Only in air
  • Both solid and liquid

(a) Only in solid

Q) What is the possible way to destruct explosive easily?

  • By burying under ground
  • By throwing in water
  • by burning them throwing in fire
  • cannot be destroyed

(c) by burning them throwing in fire

Q) When any accident resulting serious bodily injuries to any person/loss of life occurs in a mine, the manager shall inspect the site of accident as soon as possible, inquire into the causes & circumstances attending the accident. The copy of result of such enquiry, plan & section of the site of accident showing the details & photographs if practicable shall be submitted to________?

  1. CIM
  2. RIM
  3. CIM , RIM & Electrical Inspector
  4. CIM ,RIM & DM
  5. CIM & RIM

When any accident resulting serious bodily injuries to any person/loss of life occurs in a mine, the manager shall inspect the site of accident as soon as possible, inquire into the causes & circumstances attending the accident. The copy of result of such enquiry, plan & section of the site of accident showing the details & photographs if practicable shall be submitted to CIM & RIM.

Q) All conductors of an earthling system shall have conductivity, at all parts & all joints at least equal to________of the largest conductor used?

  1. 40%
  2. 50%
  3. 60%
  4. 30%
  5. None of these

All conductors of an earthling system shall have conductivity, at all parts & all joints at least equal to 50% of the largest conductor used?

Q) Cables & conductors where connected to motors, transformer, switch gear & other apparatus shall be installed so that________?

  1. They are mechanically protected by securing attaching the metallic covering to the apparatus
  2. The insulating material at each cable end is efficiently sealed so as to prevent the diminution of its insulating properties
  3. Only A
  4. Both A & B

Cables & conductors where connected to motors, transformer, switch gear & other apparatus shall be installed so that They are mechanically protected by securing attaching the metallic covering to the apparatus. The insulating material at each cable end is efficiently sealed so as to prevent the diminution of its insulating properties

Q) All parts & all joints at least equal to________of the conductivity of the largest conductor enclosed by the said metallic covering?

  1. 40%
  2. 50%
  3. 60%
  4. 30%

All parts & all joints at least equal to 50% of the conductivity of the largest conductor enclosed by the said metallic covering.

Q) Distance between any two consecutive bonds is not more than________measured along either cable?

  1. 20 m
  2. 15 m
  3. 50 m
  4. 30 m

Distance between any two consecutive bonds is not more than 30m measured along either cable.

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