Which type of bearing is a housing used to support a shaft from a fixed base?

• A. Flange
• B. Pillow block
• C. Ball
• D. Needle

Answer: (B)

The idea being tested is how a bearing is housed to support a rotating shaft from a fixed base. A pillow block is exactly that—a bearing housing that grips the bearing inside and bolts to a stationary surface. This arrangement keeps the shaft properly aligned while the outer housing remains fixed, providing a stable base, mounting holes for secure attachment, and protection for the bearing and lubricant. The other options describe different things: a flange relates to a mounting interface rather than a full housing, and ball or needle refer to types of bearings themselves rather than the housing that supports them.