What is the correct sequence of the following events of construction of a shaft in rock?
1) Drilling and blasting
ii) Timbering
iii) Pumping
iv) Mucking
Select the correct answer

A. (i) and (ii) are correct B. (iii) and (iv) are correct C. (i) and (iv) are correct D. (ii) and (iii) are correct

A. Stone masonry B. Timber C. Cast iron D. Cement concrete

A. Army method B. Needle beam method C. Austrian method D. English method

A. Only up holes B. Only down holes C. Horizontal or up holes D. Horizontal down or up holes