A、drop as the boiler warms up
B、rise as the boiler warms up
C、remain unchanged until the boiler is hot enough
D、rise and fall with the steam demand
更多“When steam is being raised on a boiler, the water level will normally （）.”相关的问题
A、A.rise when the steam pressure is increased B、B.remain constant as long as the feed pump operates C、C.fall when the steam pressure is decreased D、D.vary as the steam demand changes
A、A.There is apparent condensate in piping B、B.The steam is not discovered after admitting steam C、C.The condensate should be fully loaded in the piping as admitting steam D、D.The condensate should be fully drained from the piping while admitting steam
A、A. When the derrick is stopped, the guy must be stowed. B、B. When the derrick is stopped, the guy must be topped. C、C. When the derrick is stopped, the guy must be lowered. D、D. When the guy is stopped, the derrick must be stowed.
A、When attacking the fire directly B、When using a steam smothering system C、When using the fixed CO2 system D、All of the above
A、When Area 0 is active, the loopback interface must be configured in OSPF for it to be advertised. B、When Area 0 is active, the loopback address is automatically advertised into other areas. C、When Area 0 is active, the OSPF router-id must match the loopback address for the loopback address to be advertised. D、When Area 0 is active, the router-id must be configured for the loopback address to be advertised.
A、When uptime is critical B、When data must be refactored C、When application concurrency is static D、When data loss is unacceptable E、When application is a single point of failure
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