An axial-fl ow blower delivers 40 ft3/s of air that enters at20°C and 1 atm. The flow passage has a 10-in outer radiusand an 8-in inner radius. Blade angles are α1 = 60° andβ2 = 70°, and the rotor runs at 1800 r/min. For thefirst stage compute (a) the head rise and (b) the powerrequired.

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Fire safety

Fire safety is a new domain emerged in the early 90s to enable the design of buildings, structures, and infrastructure against destruction through fire. It also includes the provisions of building codes. This field is mostly associated with the design and efficient planning of a building, to reduce the destruction caused by fire. The branch of engineering that deals with it for the safety of the buildings from destruction of fire, is known as fire safety engineering.