Which are the two types of non-hydraulic jacks?

Which are the two types of non-hydraulic jacks?

• A. Hydraulic & Electric Jacks
• B. Pneumatic & Manual Jacks
• C. Screw & Ratchet-Lever Jacks
• D. Scissor & Bottle Jacks

Answer: (C)

Non-hydraulic jacks are mechanical devices that lift without using hydraulic fluid. The two common forms are screw jacks and ratchet-lever jacks. A screw jack uses a threaded screw and nut; turning the screw with a handle slowly raises the load and can hold it in place due to the thread’s friction. A ratchet-lever jack uses a lever and pawl on a ratchet; each pump of the lever lifts a little and the pawl locks between strokes, letting you raise the load quickly and lock it in position. These two embody the mechanical, fluid-free approach, unlike options that rely on hydraulic fluid or other mechanisms.

Non-hydraulic jacks are mechanical devices that lift without using hydraulic fluid. The two common forms are screw jacks and ratchet-lever jacks. A screw jack uses a threaded screw and nut; turning the screw with a handle slowly raises the load and can hold it in place due to the thread’s friction. A ratchet-lever jack uses a lever and pawl on a ratchet; each pump of the lever lifts a little and the pawl locks between strokes, letting you raise the load quickly and lock it in position. These two embody the mechanical, fluid-free approach, unlike options that rely on hydraulic fluid or other mechanisms.