单选题Which method should be used to warm up the pump turbines prior to discharge（）.ALock the turbine rotor and slowly bleed in steam until operating temperature is reachedBRun the pump at high speed with the discharge valves closedCRun the turbine at slow speed with the pump disconnectedDShut the discharge valve and run the pump at slow speed
单选题
Which method should be used to warm up the pump turbines prior to discharge（）.
A
Lock the turbine rotor and slowly bleed in steam until operating temperature is reached
B
Run the pump at high speed with the discharge valves closed
C
Run the turbine at slow speed with the pump disconnected
D
Shut the discharge valve and run the pump at slow speed
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