Question

The CORRECT statement(s) of dragline operation is/are:

• A. The initial cut is called “Key” cut.
• B. Tandem method of operation requires at least two draglines.
• C. Dragline excavates material above the working bench.
• D. Dragline can move with walking pad.

Hint:

In dragline operations, always focus on the role of the key cut, the efficiency of tandem operations, and the capability of draglines to move with walking pads for proper excavation.

Answer 1

The Correct Option is A, B, D

Step 1: Understanding the correct dragline operations.
The key cut is the first cut made to ensure the stability of the working face and is crucial for the subsequent excavation process. Therefore, (A) is correct.
The tandem method does require at least two draglines for efficient operation, especially in large operations. Hence, (B) is correct.
Draglines are typically capable of moving with walking pads, allowing them to reposition themselves as needed for further excavation. Thus, (D) is correct.
Draglines typically excavate material from below the working bench, not above it, so (C) is incorrect.