Question

adjustable wrench
the adjustable wrench, sometimes referred to as a \crescent wrench\ (made popular by the brand name crescent) can be set to the size of the bolt or nut, by turning the spindle. this type of wrench is often used for large bolts and nuts, or when the correct size wrench is unavailable.
a well - fitting box - end or open - end is always preferable over an adjustable wrench; because due to its adjustable design, there will always be a certain amount of free play. this play can cause the adjustable wrench to lose grip, resulting in the wrench slipping off the bolt or nut. when this happens, both the tool and the nut or bolt can be damaged.
1
what is another name for the adjustable wrench?
crescent wrench
pipe wrench
breaker bar.

Explanation:

The text states that the adjustable wrench is sometimes referred to as a "Crescent wrench". There is no mention of it being called a pipe wrench or a breaker bar.

Answer:

A. Crescent wrench