A.central air condition system
B.high velocity system
C.low velocity system
D.single duct system
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A.mechanical energy
B.heat energy
C.potential energy
D.kinetic head
A.backwards
B.forwards
C.upward
D.downwards
A.air chamber
B.head lank
C.primer
D.prime mover
A.eye
B.hole
C.balance holes
D.opening
A.Carry out soot blowing if permissible
B.Change fuel supply to diesel oil
C.Close steam stop valves on boiler when pressure is reduced
D.Drain boiler empty when it has cooled down
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