Match List –I (Drill bits) with List – II (Applications)and select the correct answer using the codes given below the lists
List – I
(A) Core drill
(B) Reamer
(C) Counter bore drill
(D) Tap drill
List – II
1. To enlarge a hole to a certain depth so as to accommodate the bolt head of ascrew
2. To drill & enlarge an already existing hole in a casting
3. To drill a hole before making internal thread
4. To improve the surface finish and dimensional accuracy of the already drilled hole
Codes:
A B C D
(a) 1 3 2 4
(b) 2 3 1 4
(c) 2 4 1 3
(d) 3 2 4 1