Drilling And Blasting - Practice Test

(A) Antitropal

(B) Homotropal

(C) Longwall

(D) All of these

(B) Homotropal

(A) Position and type of barrier

(B) Frequency of barrier

(C) Rate of advance of barrier

(D) Serial Number of barrier

Position and type of barrier

(A) 1.2 m

(B) 1.8 m

(C) 2.5 m

(D) 4 m

(A) 1.2 m

(A) has at least 3 doors

(B) has atleast one door that has provision for latching

(C) all doors are principle designed open toward high pressure side of air

(D) prevent short circuiting of air when the flow is reversed in coal mines

(A) has at least 3 doors

(A) Single tube core barrel

(B) Double tube core barrel

(C) Saw toothed crown

(D) Roller bits

(B) Double tube core barrel

Drilling And Blasting - Study Mode