Ontario Operator-in-Training (OIT) Practice Exam

What materials are commonly used in piping for water transportation?

1. PVC and wood

2. Steel and rubber

3. Cast iron and reinforced concrete

4. Plastic only

The correct answer is: Cast iron and reinforced concrete

The choice of materials for piping in water transportation often relies on their durability, strength, and resistance to corrosion. Cast iron and reinforced concrete are widely recognized for their robustness and structural integrity in various applications, including water conveyance. Cast iron, known for its tensile strength, is often used in larger diameter pipes and has excellent resistance to corrosion when properly coated or treated. It can withstand high pressure and is suitable for both above-ground and below-ground installations. Additionally, cast iron pipes have a long service life and can handle the demands of water systems effectively. Reinforced concrete pipes are also popular in water transport due to their ability to bear heavy loads and resist environmental stressors. The reinforcement provides additional strength against cracking or failure while in service. These pipes are often used for larger projects such as sewer systems and drainage because of their capacity to handle significant volumes of water and soil pressure. In contrast, options mentioning PVC, wood, steel, or rubber do not adequately cover the most common materials used for long-term and high-demand water transportation requirements. PVC is often used for smaller projects or residential applications but lacks the strength for larger water systems. Wood is not a common choice for piping due to its susceptibility to rot and decay. Steel, while strong, may