Drilling And Blasting - Study Mode

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[#461] The maximum explosive violence produced when the explosive mixture contains . . . . . . . .% firedamp.

(A) 8

(B) 9

(C) 11

(D) 14

Correct Answer

(B) 9

[#462] Blasting crew consists . . . . . . . . men in underground coal mine.

(A) 3

(B) 4

(C) 5

(D) 6

Correct Answer

(B) 4

[#463] An increasing in the speed of fluid occurs simultaniously with a decrease in pressure, theorum called . . . . . . . .

(A) Archemedis

(B) Torricelli's

(C) Bernouili's

(D) Hydro kinetics

Correct Answer

(C) Bernouili's

[#464] Section some times denote a . . . . . . . .

(A) Barrier

(B) Rib

(C) Chowkidar

(D) District

Correct Answer

(D) District

[#465] The following stoppings constructed to seal a fire area are

(A) Preparatory stoppings

(B) Temporary stoppings

(C) Permanent stoppings

(D) All of these

Correct Answer

(D) All of these