Technician a Says That a Castle Nut and a Self

question 15

Multiple Choice

Technician A says that a castle nut and a self locking nut are both a one-time use fastener. Technician B says that internal snap rings are fasteners that fit into a groove on the outside of a part. Who is correct?

• A) A only
• B) B only
• C) Both A and B
• D) Neither A nor B

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Definitions:

Amnion

A thin, tough, transparent membrane that holds the amniotic fluid and surrounds the embryo.

Fluid

In a physical context, a substance that has no fixed shape and yields easily to external pressure; in a cognitive context, it refers to the capacity to think abstractly and reason adaptively.

Ectoderm

The outermost layer of cells or tissue of an embryo in early development, giving rise to the nervous system and the epidermis, among other structures.

Mesoderm

The middle layer of an embryo in early development, giving rise to the musculoskeletal, vascular, and urogenital systems.