Question 14General Subjects - 1st Asst/Chief
70% to passAs the speed of an oil lubricated ball bearing increases, fluid friction, due to churning, generates heat. This condition may be avoided by _______________.
Areducing the quantity of lubricant until only a mist of oil is present on the ball bearings
Binstalling oil rings on the ball bearings
Cadding more lubricant until the ball bearings are completely covered with a layer of oil
Dmaintaining a continuous fluid film of oil on the bearings
AI Explanation
The correct answer is A) reducing the quantity of lubricant until only a mist of oil is present on the ball bearings. As the speed of an oil-lubricated ball bearing increases, fluid friction due to churning generates heat. This heat can be avoided by reducing the quantity of lubricant to the minimum needed to maintain a thin, mist-like film on the bearings. This reduces the amount of fluid friction and churning, thereby minimizing heat generation. Options B, C, and D would increase the amount of lubricant, which would actually exacerbate the heat generation problem.
Related Questions
Q215:In the illustrated terminal reheat multiple zone system, what statement represen... Q120:For an electro-hydraulic cargo-handling pedestal-type deck crane, what event wou... Q193:A pneumatic pressure tank is installed in a sanitary system to _______________. Q46:Steam supply for the operation of the low pressure evaporators may be obtained ... Q288:Which of the following maintenance criteria would be the basis of planned mainte...
Ready to test your knowledge?
Take a General Subjects - 1st Asst/Chief Practice ExamOfficial Resources