Why lime is sprinkled on the accumulation of black damp?
A. it absorbs CO2 in the black damp
B. it resists coal dust explosion
C. it resists gas explosion
D. it gives off H2O to extinguish fire
Answer: Option A
A. it absorbs CO2 in the black damp
B. it resists coal dust explosion
C. it resists gas explosion
D. it gives off H2O to extinguish fire
Answer: Option A
Combustable oils or materials not used for filling in . . . . . . . . Equipment
A. Hydraulic
B. Chemical
C. Biological
D. Eletrical
Out of the following belt conveyor related items which one is provided for safety for the persons?
A. Loop-take-up
B. Idler set
C. Audio-visual alarm
D. sequential control switch
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