10,Diamond drilling is applicable upto a max depth of .....m?,
500,1000,3000,5000,3
11,Manual drilling is possible upto max depth of.....m?,
15,30,45,60,2
12,The core(dia in mm) size obtained with NX size?,
21,28,40,54,4
13,The feed mechanism is not necessary beyond the depth of....m?,
30,40,50,60,4
14,Single tube core barrel is suitable for recovering core from rocks of ?,
soft,friable,homogeneous,hard,3
15,Double tube core barrel is suitable for rocks of ?,
hard,homogeneous,soft and friable,none of the above,3
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