In pump and roll operations, which step should be performed before moving the vehicle?

• A. Engage the PTO and accelerate
• B. Shift into drive and release the parking brake
• C. Check water supply and gauge readings
• D. Come to a complete stop and set the parking brake

Answer: (D)

Securing the vehicle before any move is essential in pump and roll operations. By coming to a complete stop and applying the parking brake, you lock the rig in place so you can safely prepare the pump, connect lines, and verify water supply and gauges without the risk of the vehicle rolling or the system shifting mid-setup. This stationary position keeps crew safe, prevents damage from unexpected movement, and allows proper priming and readiness checks before proceeding. Engaging the PTO and moving, or shifting gears with the brake released, would introduce uncontrolled movement and safety hazards, so securing the vehicle first is the correct, safest step.