Question

Match the following: 

List-I (Boring Methods)		List-II (Field Conditions)
(A)	Auger Boring	(I)	Below water table in all soil types except hard soils and rocks
(B)	Wash Boring	(II)	Large diameter bore holes over 150 mm in size
(C)	Percussion Drilling	(III)	Exploration for shallow foundations and highways
(D)	Rotary Drilling	(IV)	Bouldery and gravelly strata

The correct answer is:

• A. \(A-III,\;B-I,\;C-IV,\;D-II\)
• B. \(A-I,\;B-II,\;C-IV,\;D-III\)
• C. \(A-II,\;B-III,\;C-IV,\;D-I\)
• D. \(A-III,\;B-I,\;C-II,\;D-IV\)

Hint:

Remember:
• Auger boring $\rightarrow$ Shallow exploration.
• Wash boring $\rightarrow$ Below water table.
• Percussion drilling $\rightarrow$ Gravel and boulders.
• Rotary drilling $\rightarrow$ Deep and large diameter boreholes.

Answer 1

The Correct Option is A

Concept: Different boring methods are suitable for different field conditions depending on the type of soil and depth of exploration.

Step 1: Identify the applications of each boring method.
• Auger Boring $\rightarrow$ Suitable for shallow exploration and highway investigations.
• Wash Boring $\rightarrow$ Suitable below the water table in most soils except hard rock.
• Percussion Drilling $\rightarrow$ Suitable for bouldery and gravelly strata.
• Rotary Drilling $\rightarrow$ Used for large diameter bore holes.

Step 2: Match the lists. \[ A\rightarrow III,\qquad B\rightarrow I,\qquad C\rightarrow IV,\qquad D\rightarrow II. \] Hence, \[ \boxed{A-III,\;B-I,\;C-IV,\;D-II} \] Therefore, the correct option is \[ \boxed{(A)\;A-III,\;B-I,\;C-IV,\;D-II.} \]