Emergency stoppages in pipelines may be cleared safely by use of

• A. Hand rods
• B. High velocity cleaners
• C. Power rodders
• D. All of the above

Answer: (D)

Emergency stoppages in pipelines can be cleared safely by using the right tool for the situation, with proper training and safety procedures. Hand rods are useful for quick, light clearances near the access point and for probing a blockage without applying heavy forces. Power rodders provide mechanical force to push and cut through tougher blockages, offering more control than brute pushing. High velocity cleaners (hydro jetting) use high-pressure water to blast away grease, roots, and sediment, effective on stubborn or larger mains but require careful pressure control and correct nozzle use to avoid damaging the pipe. When applied correctly, each method can safely clear an emergency blockage, so using all of the above covers the safe options.