The axis that runs across the width of the transducer.

The axis that runs across the width of the transducer.

• A. X axis
• B. Z axis
• C. Y axis
• D. W axis

Answer: (B)

In the transducer coordinate system used here, directions are defined relative to the transducer face. The axis that runs left-to-right across the width of the face is designated as the Z axis. The axis perpendicular to the face and pointing into the body is the X axis, and the vertical direction along the face is the Y axis. Since the question asks about the axis across the width, that dimension corresponds to Z, which is why this choice is correct. The other options don’t describe the across-width direction in this convention, and W isn’t a standard axis in this setup.

In the transducer coordinate system used here, directions are defined relative to the transducer face. The axis that runs left-to-right across the width of the face is designated as the Z axis. The axis perpendicular to the face and pointing into the body is the X axis, and the vertical direction along the face is the Y axis. Since the question asks about the axis across the width, that dimension corresponds to Z, which is why this choice is correct. The other options don’t describe the across-width direction in this convention, and W isn’t a standard axis in this setup.