Tunnel Engineering

Assertion A: English method of tunnelling requires more time as compared to other methods of tunnelling.
Reason R: In English method of tunnelling, the masons and excavators have to work alternately
Select your answer based on the coding system given below:

  • A. Both A and R is true and R is the correct explanation of A
  • B. Both A and R is true and R is not the correct explanation of A
  • C. A is true but R is false
  • D. A is false but R is true
Answer: Option A.

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

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