Question 687Steam Plants - Assistant Engineer70% to pass
As lube oil absorbs moisture its dielectric strength can be expected to _______________.
AI Explanation
The correct answer is D) decrease.
As lube oil absorbs moisture, its dielectric strength will decrease. This is because moisture acts as a contaminant in the oil, reducing its insulating properties and making it a better conductor of electricity. As the dielectric strength decreases, the oil becomes less effective in insulating and protecting electrical components in the system.
The other answer choices are incorrect because: A) an increase in viscosity would actually decrease the dielectric strength, not increase it; B) an increase in viscosity would also decrease the dielectric strength; and C) the dielectric strength cannot remain the same as it is negatively impacted by the absorption of moisture in the lube oil.
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