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10 Questions

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Fan Bearing Maintenance Criteria Quiz

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Questions and Answers

What is the minimum percentage of contact uniformly in the pressure zone of 1200 for the bearing seating in housing, according to the maintenance criterion?

80%

70% (correct)

50%

60%

How should the radial clearance of the bearing be checked according to the maintenance criterion?

Using a feeler gauge

Using a taper gauge

Using Prussian blue

Using three lead wire method (correct)

What is the maximum axial or thrust clearance allowed for the bearing according to the maintenance criterion?

0.30 mm

0.40 mm

0.20 mm

0.45 mm (correct)

How should the lip clearance of the bearing be checked according to the maintenance criterion?

Using feeler gauge Signup and view all the answers

What should be done if the suction cone clearance is not uniform after changing the impeller, based on the maintenance criterion?

Adjust the suction cone to get the required clearance Signup and view all the answers

How should the condition of the impeller be checked according to the maintenance criterion?

By checking for the presence of ash and sinter fines on the impeller blades and shrouds Signup and view all the answers

What action should be taken if the lip clearance of the bearing is found to be out of criteria based on the maintenance guideline?

Adjust the radial clearance with a feeler gauge Signup and view all the answers

According to the maintenance criterion, how is the radial clearance of the taper bore spherical roller bearing adjusted?

By tightening the adapter sleeve up to the required level Signup and view all the answers

What is the basis for changing the RC bearing according to the maintenance criterion?

Previous CBM recommendation Signup and view all the answers

How is the condition of the lub oil temperature checked according to the maintenance criterion?

By observing in temp gauge and checking inlet cooling water temp Signup and view all the answers