Final answer:
The counterbalance forklift is designed to lift loads straight up with minimal tilt, using hydraulic and mechanical lever systems. It is distinct from the pallet jack forklift, as it can lift and carry heavier loads to various heights thanks to its counterweight mechanism. Correct answer is 4.
Step-by-step explanation:
The type of forklift designed primarily to lift a load straight up with a limited amount of tilt movement forward is the counterbalance forklift. Unlike a pallet jack forklift which is used for moving loads over short distances on flat surfaces, a counterbalance forklift is equipped with a counterweight at the back which balances the weight of the load on its forks, enabling it to lift and stack materials at various heights safely.
Counterbalance forklifts make use of hydraulic and mechanical lever systems to move heavy loads. These systems, according to the provided references, function similarly to a hydraulic jack where a force applied over a small area can move a much larger force over a larger area. This is essential in machinery used for lifting, such as backhoes and forklifts, where a weight (Wload) needs to be lifted or moved easily by the operator.
For example, when a 10 kg box needs to be lifted and moved in a warehouse, the counterbalance forklift can raise the box smoothly due to its hydraulic system, safely transport the box across the area if necessary, and then place it down with precision. The lifting capability of counterbalance forklifts is indispensable for many industrial and warehousing tasks.