MCQ 1 In percussive drilling the rock is broken by following action?

(A) Crushing (B) Chipping (C) Both crushing and chipping (D) None of the above

MCQ 2 The drilling rods are made of?

(A) Cast iron (B) Steel (C) Ni-cr (D) Caststeel

MCQ 10 Which is used for raising and lowering the rods of square section?

(A) BUlldog (B) Sludger (C) Retainingkey (D) None of the above

MCQ 14 Which is used for raising and lowering the rods of circular section?

(A) Bulldog (B) Sludger (C) Corebarrel (D) Retainingkey

MCQ 13 The sludge or cuttings in the borehole are removed withe help of ?

(A) Corebarrel (B) Sludger (C) Retainingkey (D) Bulldog

MCQ 21 The device used to catch broken rods under a joint in the borehole?

(A) Crow's foot or spiral worm (B) Sudger (C) Screw feed? (D) Bulldog

MCQ 3 The operation of tracing the broken and lost parts in the hole and withdrawing them to the surface is known as ?

(A) Lining the borehole (B) Drilling (C) Borehole survey (D) Fishing the borehole

MCQ 23 What is the purpose of lining the borehole?

(A) To prevent caving of sides? (B) To prevent water percolation (C) To easy drilling operation? (D) None of the above

MCQ 11 The percussive drilling is applicable upto max depth of __________m?

(A) 200 (B) 300 (C) 500 (D) 700

MCQ 9 Diamond drilling is applicable depth upto ___________m?

(A) 500 (B) 1000 (C) 3000 (D) 5000

MCQ 20 Manual drilling is possible upto max depth of _________m?

(A) 15 (B) 30 (C) 45 (D) 60

MCQ 4 The feed mechanism is not necessary beyond the depth of __________m?

(A) 30 (B) 40 (C) 50 (D) 60

MCQ 15 Single tube core barrel is suitable for recovering core from rocks of ?

(A) Soft (B) Friable (C) Homogeneous (D) Hard

MCQ 19 Double tube core barrel is suitable for rocks of ?

(A) Hard (B) Homogeneous (C) Soft and friable (D) None of the above

MCQ 8 Bore hole deviation is _______________deg for 30m?

(A) 1 (B) 2 (C) 3 (D) 4

MCQ 12 Borehole survey means ?

(A) Measurment of deviation (B) Measurment of depth (C) Measurment of time taken (D) None of the above

MCQ 5 In etch method which acid is used to measure borehole deviation?

(A) Sulfuric acid (B) Hydrocloric acid (C) Nitric acid (D) Hydrofloric acid

MCQ 18 In ANFO explosive the % of diesel oil is mixed for effective oxygen balanced explosive mixture is?

(A) 4 − 5% (B) 5 − 6% (C) 6 − 7% (D) 7 − 9%

MCQ 24 The VOD of ANFO is ?

(A) 3500 m/s (B) 3000 m/s (C) 6000 m/s (D) 3200 m/s

MCQ 22 The amount of diesel oil mixed for 100kg of AN is dry season and wet season ?

(A) 5 and 6 (B) 6 and 7 (C) 7 and 9 (D) 10 and 12

MCQ 16 In ANFO the water content should not be more than?

(A) 6% (B) 7% (C) 8% (D) 9%

MCQ 6 The constituents in slurry explosivie (TNT:AN:Water) ?

(A) 20:15:65 (B) 20:65415 (C) 15:20:65 (D) 65:15:20

MCQ 17 The reducing agent in slurry explosive is ?

(A) TNT (B) AN (C) Water (D) Starch

MCQ 7 The gelling agent in slurry explosive is ?

(A) TNT (B) AN (C) Water (D) Starch