Drilling And Blasting - Study Mode

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[#751] Hydrazine is used for detection of which of the following gas.

(A) CO 2

(B) CO

(C) CH 4

(D) H 2 S

Correct Answer

(A) CO 2

[#752] A connection between two levels in ore body dirven in downward direction.

(A) Rise

(B) Draw point

(C) Dip

(D) Drought

Correct Answer

(C) Dip

[#753] The angle between the chord of aerofoil and the direction of the average relative velocity of air is called . . . . . . . .

(A) Angle of attack

(B) Specific capacity

(C) Co-efficient

(D) Angle of friction

Correct Answer

(A) Angle of attack

[#754] The gradient from brow to inclined mouth and in the incline is steep nearly.

(A) 1 in 2

(B) 1 in 3

(C) 1 in 4

(D) 1 in 5

Correct Answer

(D) 1 in 5

[#755] Air screw fan pushes air forward in the direction parallel to the . . . . . . . .

(A) Axis

(B) Centrifugal

(C) Centripatel

(D) Tangential to circumface

Correct Answer

(A) Axis