Tunnel Engineering

Pick up the explosive used for tunnelling in soft rocks from the following:

  • A. Blasting gelatine
  • B. Special gelatine
  • C. Ammonia dynamite
  • D. Semi-gelatine
Answer: Option C.
Explanation: 

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

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