Question

Match the List - I with List - II:

• A. (1)-(iii), (2)-(ii), (3)-(iv), (4)-(i)
• B. (1)-(iv), (2)-(i), (3)-(iii), (4)-(ii)
• C. (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii)
• D. (1)-(iv), (2)-(iii), (3)-(i), (4)-(ii)

Hint:

An Allen key is specifically designed for “socket head” fasteners, whereas a spanner is used for standard external hexagonal heads of nuts and bolts.

Answer 1

The Correct Option is C

Step 1: Identifying the Function of Each Tool and Fastener Pair:
Let us analyze how each fastener is driven, adjusted, or tightened in mechanical practice:
• (1) Screw: A conventional screw has a slotted or Phillips head and is rotated/driven using a standard (iii) Screw driver. Thus, (1) matches with (iii).
• (2) Hexagonal socket head screw: Also known as an Allen bolt, it features a hexagonal recess in its head. It is tightened using an L-shaped hexagonal wrench called an (i) Allen key. Thus, (2) matches with (i).
• (3) Cotter: A cotter is a flat wedge-like piece of steel used to connect rods. It is driven into place or removed by hammering, requiring a (iv) Hammer. Thus, (3) matches with (iv).
• (4) Nut-bolt: Hexagonal or square nuts and bolts are tightened and loosened by gripping their flats using a standard wrench, also known as a (ii) Spanner. Thus, (4) matches with (ii).

Step 2: Matching with Options:
The matching sequence is (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii), which is option (C).