Opencast Mining - Study Mode

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[#261] This type of fuel not being washed to improve heat value.

(A) Lignite

(B) Bituninous coal

(C) Anthracite

(D) Cooking coal

Correct Answer

(A) Lignite

[#262] Number of holes drilled by two persons is sandstone with a depth of 1.2 - 1.5 m.

(A) 30

(B) 40

(C) 50

(D) 60

Correct Answer

(D) 60

[#263] The following excavator will be used for a bench height of 20 m to 30 m of soft rock formation.

(A) Dozer

(B) Shovel

(C) Pay loader

(D) Bucket wheel excavator

Correct Answer

(D) Bucket wheel excavator

[#264] Most suitable for ripping rocks and medium hard rocks below 5 hardness scale which are laminated and stratified is . . . . . . . .

(A) Scraper

(B) Dozer

(C) Ripper

(D) Shovel

Correct Answer

(C) Ripper

[#265] The slope angle for hard and compact ground should not be more than

(A) 10°

(B) 30°

(C) 50°

(D) 70°

Correct Answer

(D) 70°