EOM-2 paper-1

1,The oxygen percentage in intake air is?,

20.28 %,78.04 %,20.93 %,25 %,3

2,The oxygen percentage in return air is?,

20.28 %,78.04 %,20.93 %,25 %,1

3,Decay of timber by fungus growth is caused by?,

CH4,O2 absorption,N2 depletion,CO2,2

4,Each 1 % reduction in the O2 % results in about the depletion from the light is?,

10 %,20 %,30 %,40 %,3

5,The light of oil lamps is extiguished when O2 % is falls to?,

19 %,17.5 %,21 %,20 %,2

6,Mining laws in India require that mine air should contain minimum % of O2 is?,

25 %,21 %,19 %,17 %,3

7,CO2 is mostly found at?,

roof ,middle of the roadway,dip areas of depillaring areas,anywhere in the mine,3

8,The permissible limit of CO2 is?,

0.5 %,1.25 %,0.75 %,1 %,1

9,Flame safety lamp is extinguished at CO2 %?,

1 - 2,2 - 3,3 - 4,4 - 5,3

10,Black damp is mixture of?,

CO2+N2,CO2+H2,CO2+02,CO2+CO,1