Which lifting device is placed between the ground and an object and inflated to lift or separate objects?

• A. Nader pin
• B. Rope bag
• C. Hydraulic jack
• D. Pneumatic lifting bag

Answer: (D)

Inflatable lifting bags are designed to sit between the ground and a load and be inflated to lift or separate objects. They use air pressure to expand a flexible bag, which lifts the load gradually and distributes the force over a larger surface area. This makes it possible to lift heavy items safely, create space for cribbing, or reposition objects without damaging them. The other devices don’t fit because a hydraulic jack uses fluid pressure, not air, and is not described as being inflated; a Nader pin is a locking/securement device, not a lifting tool; and a rope bag isn’t a standard lifting device for separating loads.