A good blast with a good yield is obtained if the cut hole is___________________?

Related Mcqs:

Drifters can be used to drill_________________?

A. only up holes B. only down holes C. horizontal or up holes D. horizor„al, down or up holes...

The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?

A. wagon drill, churn drill, shot drill B. wagon drill, shot drill, churn drill C. shot drill, churn drill, wagon drill D. churn drill, wagon drill, shot drill...

Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than_____________________?

A. 2 m B. 3 m C. 4 m D. 5 m...

Which of the following is not a component of the shield ?

A. propelling jacks B. liner plate C. hood D. tail...

If ‘N’ is the number of shafts used, then the total number of feces available for attacking the excavation and construction in tunnels are_________________________?

A. 2N B. N + 2 C. 2 N + 1 D. 2 N + 2...