Question 162Motor Plants - 1st Asst/Chief70% to pass
What is the normal bearing clearance permitted at the horizontal axis of the shaft for the bearing shown in the illustration? Illustration MO-0121
AI Explanation
The correct answer is B) The normal play on both sides of the shaft will be one tenth of a millimeter.
This is the correct answer because the typical clearance between the shaft and the bearing housing in a marine engine application is around 0.1 mm on each side. This small clearance allows for thermal expansion and prevents excessive wear while maintaining a stable hydrodynamic oil film. The tolerances are standardized across manufacturers and established through engineering best practices for marine machinery.
The other options are incorrect because A) the tolerances are typically standardized, C) the clearance is on both sides, not just one, and D) the clearance is measured during installation, not just while underway.
Related Questions
#160 When installing the bearing cap on the device shown in the illustration, which of the precautions listed must be observed? Illustration MO-0121 #161 What is the maximum allowable clearance permitted between the bearing, shown in the illustration and the shaft along its vertical axis? Illustration MO-0121 #163 After following the prescribed procedures to measure the thrust bearing clearance shown in the illustration, the distance "F" is determined to be 200 mm, and 'f1' is 2.3 mm. Which of the following statements describes the condition indicated by these dimensions? Illustration MO-0121 #164 When an additional load is applied to a diesel engine which is using an inadequately inflated air bladder clutch unit, you can expect_______________.#165 Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or _______________.