单选题The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the（）.Aloss of residual magnetismBabsorption of moisture in the insulationCinsulation varnish flakingDdirt collecting on the windings
单选题
The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the（）.
A
loss of residual magnetism
B
absorption of moisture in the insulation
C
insulation varnish flaking
D
dirt collecting on the windings
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