Final answer:
Steam line controls during pile driving operations typically include a combination of shut off valves and quick-acting lever type valves to ensure rapid and effective management of steam flow.
Step-by-step explanation:
The question pertains to the necessary components of steam line controls during pile driving operations. For safe and effective control over the steam supply in heavy machinery, it is standard to include at least two separate mechanisms to quickly and effectively manage the flow of steam. The answer to the student's question depends on the specific safety regulations and standards in place for pile driving operations.
However, commonly, the correct setup would include a combination of shut off valves and quick-acting lever type valves, which allows for rapid response in shutting off the steam, as well as fine control over its flow during operation.