If Three-Phase Transformation Is Needed and a Three-Phase Transformer of the Proper

question 24

Multiple Choice

If three-phase transformation is needed and a three-phase transformer of the proper size and turns ratio is not available, three single-phase transformers can be connected to form a _____.

• A) three-phase bank
• B) wye-delta bank
• C) wye bank
• D) delta bank

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Definitions:

Tympanic Membrane

The tympanic membrane, commonly known as the eardrum, is a thin layer that separates the external ear from the middle ear and vibrates in response to sound waves.

Auditory Ossicle

Bone of the middle ear; includes the malleus, incus, and stapes.

Malleus

A small bone in the middle ear that transmits sound vibrations from the eardrum to the inner ear.

Accommodation

In optics, the ability of the eye to change its focal length to focus on objects at various distances, or the process of adjusting to something new.