During a pump and roll operation, how is a fire stream produced?

In a pump and roll operation, a fire stream is produced while the apparatus is in motion. This technique is crucial for effectively managing fire suppression in situations where mobility is vital, such as in wildland firefighting or in areas with difficult access.

By allowing the fire apparatus to move while simultaneously pumping water, firefighters can position themselves closer to the fire and maintain continuous flow of water, which is essential for effective fire suppression. This capability provides a tactical advantage by enabling quick repositioning and more effective coverage of the fire area, which stationary operations may not provide.

The other choices focus on scenarios that do not leverage the inherent benefits of the pump and roll technique, as stationary operations or only activating a pump without vehicle movement would limit the efficiency and effectiveness of the response.