Drilling And Blasting - Study Mode

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[#816] The maximum height of roadway permitted by law.

(A) 2 m

(B) 1.8 m

(C) 3 m

(D) 5 m

Correct Answer

(C) 3 m

[#817] Higher limit of inflammability of coal dust for bituminous coal is . . . . . . . .

(A) 500 g/cc

(B) 1000 g/cc

(C) 1500 g/cc

(D) 2000 g/m 3

Correct Answer

(D) 2000 g/m 3

[#818] When adopting any of the methods of artificial respiration . . . . . . . . factor is very important.

(A) Patient condition

(B) Time

(C) Method

(D) First order

Correct Answer

(B) Time

[#819] Catalysist which changes CO to

(A) O 2

(B) CO 2

(C) CH 4

(D) CO 3

Correct Answer

(B) CO 2

[#820] The operating life of chemical and breathing apparatus AUER/SAR - 30.

(A) 20 min

(B) 30 min

(C) 45 min

(D) 60 min

Correct Answer

(B) 30 min