Construction Coordinator Practice Exam

What mechanisms do pit dry boring machines utilize to bore through soil and underneath obstacles?

1. Chains and hooks

2. Hydraulic power, a rod pusher, steel rods, and a piercing tool

3. Electric motors and conveyor belts

4. Pneumatic pressure and rotary drills

The correct answer is: Hydraulic power, a rod pusher, steel rods, and a piercing tool

Pit dry boring machines utilize hydraulic power, a rod pusher, steel rods, and a piercing tool to bore through soil and navigate beneath obstacles effectively. Hydraulic power provides the necessary force to push the rods through the earth while also controlling the movement of the apparatus. The rod pusher is a critical component that aids in feeding the steel rods into the ground, allowing for continuous drilling without the need to remove and replace the entire system frequently. The steel rods extend the reach of the boring machine, making it possible to penetrate deeper into the ground. Finally, the piercing tool at the end of the assembly is specifically designed to break through the soil and any other materials encountered underground, ensuring efficient advancement of the boring process. In contrast, other options do not accurately represent the mechanisms used in pit dry boring. For example, chains and hooks are more commonly associated with lifting or pulling rather than the specific boring process. Electric motors and conveyor belts typically do not apply to the soil boring context directly, as they serve different purposes primarily related to transportation or assembly. Similarly, while pneumatic pressure can be involved in certain drilling methods, it does not encompass the comprehensive set of tools utilized in pit dry boring as effectively as the hydraulic and mechanical components mentioned.