Question

ratchet wrench
the ratchet wrench combines the convenience of a ratchet with the compact design of a wrench in one tool. this type of wrench does not need to be taken off and repositioned over bolt or nut; the hexagonal (or double - hexagonal) center of the ratchet wrench can be rotate relative to the handle.
a bolt or nut can be quickly loosened or tightened, because the mechanism locks in only one direction to transfer force. ratcheting can be reversed by either flipping over the wrench, or activating a reversing lever.
why can you work quicker with a ratchet wrench than with a regular box - end wrench?
the ratchet wrenchs handle has a more ergonomic design, which enables you to work fas
the ratchet wrench is adjustable to accommodate different nut and bolt sizes.
the wrench does not need to be taken off the bolt or nut and repositioned when tightening or loosening.

Explanation:

To determine why a ratchet wrench allows quicker work than a regular box - end wrench, we analyze the options:

1. The first option about the ergonomic design of the handle is not supported by the given text about the ratchet wrench's mechanism. The text focuses on the repositioning and ratcheting mechanism, not the handle's ergonomics.
2. The second option about adjusting to different nut and bolt sizes is also not mentioned in the provided text about the ratchet wrench. The text describes the ratcheting and repositioning - free operation, not size adjustment.
3. The third option states that the wrench does not need to be taken off the bolt or nut and repositioned when tightening or loosening. This is in line with the text which says "This type of wrench does not need to be taken off and repositioned over bolt or nut; the hexagonal (or double - hexagonal) center of the ratchet wrench can be rotated relative to the handle" and also explains how this allows for quick loosening or tightening.

Answer:

The wrench does not need to be taken off the bolt or nut and repositioned when tightening or loosening.