Details

MINE BLASTER RESTRICTED (METAL) EXAM DEC 2021

1) No smoking , welding or making firewithin –m of sleeping hole

a)      30

b)      35

c)      40

d)     45

e)      none of above

2) The Minimum required length of shot firing cable in a belowground mine is

a)      18 m

b)      14 m

c)      none of above

d)     15 m

e)      none of above

3) Stemming of  holes shall be carried out by –

a)      Blasting helper

b)      Blaster

c)      Blaster or under his personal supervision

d)     Worker

e)      Mazdoor

4) The explosives fired by ignition of flame is

a)      Booster

b)      Gun powder

c)      LOX

d)     ANFO

e)      Slurry explosives

5) Which type of explosives shall not be used in any coal mine

a)      Solid oxygen explosives

b)      Slurry explosives

c)      carriage explosives

d)     boosters

e)      Liquid oxygen explosives

6) LOX stand for

a)      Liquid oxygen Explosives

b)      Liquid oil explosive

c)      Liquid oxygen gas

d)     Liquid oil based explosive

e)      All the above

7) Socket in blasting is related to

a)      Misfired hole

b)      Safety fuse

c)      Detonator

d)     Explosive carrier

e)      Part of blast hole remaining after being blasted

8) Detonating cord consists of

a)      NG

b)      TNT

c)      ANFO

d)     PETN

e)      all the above

9) In firing area charging and blasting shall be completed within

a)      5hrs

b)      4hrs

c)      3hrs

d)     2hrs

e)      none of above

10) No 6 detonator have delay is

a)      25 mili second

b)      30 mili second

c)      35 mili second

d)     640 mili second

None of above

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