With vacuum up and the main propulsion turbine standing by while awaiting engine orders, it is necessary to roll the unit alternately ahead and astern every five minutes to __________.
A
distribute the gland sealing steam evenly throughout the glands
B
warm the astern guarding valve and the low lube oil pressure throttle trip
C
slowly bring the lube oil and bearings to operating temperature
D
reduce the possibility of warping the turbine rotors
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Question 1 / 205eccefa1bacbc34ba4d472c8
Question 1 of 205eccefa1bacbc34ba4d472c8
With vacuum up and the main propulsion turbine standing by while awaiting engine orders, it is necessary to roll the unit alternately ahead and astern every five minutes to __________.
With vacuum up and the main propulsion turbine standing by while awaiting engine orders, it is necessary to roll the unit alternately ahead and astern every five minutes to __________.