Drilling And Blasting - Study Mode

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[#861] Samples of coal dust in the mine with stone dust should be taken at regular intervals of . . . . . . . . days.

(A) 7

(B) 24

(C) 30

(D) 36

Correct Answer

(A) 7

[#862] The unit of resistance in SI units is . . . . . . . .

(A) N/m 3

(B) NS 2 m -8

(C) NSm -6

(D) NSm -4

Correct Answer

(B) NS 2 m -8

[#863] The weight of proto mark IV apparatus . . . . . . . .

(A) 14.6 kg

(B) 18.6 kg

(C) 15.6 kg

(D) 13.6 kg

Correct Answer

(C) 15.6 kg

[#864] The main transporting medium where high outputs are to be handled.

(A) Selt conveyor

(B) Direct rope haulage

(C) Main and tail haulage

(D) Gravity haulage

Correct Answer

(A) Selt conveyor

[#865] The minimum insulation resistance of medium power cable is . . . . . . . .

(A) 0.5 mega ohm

(B) 1 mega ohm

(C) 1.5 mega ohm

(D) 10 mega ohm

Correct Answer

(B) 1 mega ohm