MDE 10 Q5

Correct Answers: A) Replace worn or damaged gears
C) Adjust or realign misaligned gears

Explanation:

• Replace worn or damaged gears: Worn or damaged gears can increase friction and cause operational issues. Replacing them with new gears addresses the root cause of the excessive friction.
• Adjust or realign misaligned gears: Misaligned gears can cause excessive friction and wear. Correcting the alignment ensures smooth engagement and operation of the gears, reducing friction.

Note: Increasing the gearbox oil temperature and decreasing the oil level are not effective solutions for dealing with friction issues due to worn or misaligned gears. Using a different type of lubricant might help in some cases but does not address the underlying mechanical issues with the gears themselves.

Correct Answers: A) Add oil to the gearbox until it reaches the recommended level
D) Regularly check and maintain the oil level

Explanation:

• Add oil to the gearbox until it reaches the recommended level: Adding the appropriate amount of oil directly addresses the issue of insufficient oil level, ensuring proper lubrication and operation.
• Regularly check and maintain the oil level: Regular monitoring and maintenance prevent the oil level from dropping below the recommended amount, helping to avoid future problems.

Note: Installing a larger oil reservoir can be helpful but is not a direct solution to the immediate problem of insufficient oil. Decreasing the operational load or using a different type of lubricant does not address the core issue of the oil level being too low.

Correct Answers: A) Improve ventilation or cooling systems around the gearbox
B) Use high-temperature resistant lubricants
D) Reduce the gearbox's operational speed

Explanation:

• Improve ventilation or cooling systems around the gearbox: Enhancing the ventilation or adding cooling systems can help manage and reduce the temperature around the gearbox.
• Use high-temperature resistant lubricants: Lubricants designed to withstand higher temperatures will perform better under elevated ambient temperatures and prevent overheating.
• Reduce the gearbox's operational speed: Operating the gearbox at a lower speed can reduce friction and heat generation, helping to manage the effects of high ambient temperatures.

Note: Increasing the ambient temperature control systems is not a practical solution since the problem is related to high ambient temperatures rather than controlling or increasing them. Insulating the gearbox would retain heat rather than alleviate the problem.

Correct Answers: A) Regularly inspect and clean the oil filters
C) Increase the oil level to the recommended amount
E) Replace worn or damaged oil pumps

Explanation:

• Regularly inspect and clean the oil filters: Oil filters that are clogged can restrict oil flow. Regular maintenance ensures that oil can circulate freely.
• Increase the oil level to the recommended amount: Ensuring that the oil level is at the proper level helps maintain adequate lubrication and flow within the gearbox.
• Replace worn or damaged oil pumps: If the oil pump is not functioning correctly, it can cause inadequate oil flow. Replacing it will restore proper circulation.

Note: Proper alignment of the gearbox components and installing a larger oil reservoir might help in specific situations but are less direct solutions to inadequate oil flow issues compared to the selected answers. Reducing the operating temperature is more related to managing the effects of high temperature rather than directly addressing flow issues.

Correct Answer: A) To ensure adequate cooling and prevent overheating of gearbox components

Explanation: Large quantities of lubricating oil in a gearbox are used primarily to ensure proper cooling and to prevent overheating of the gearbox components. The oil helps absorb and dissipate heat generated by the friction and mechanical work within the gearbox, maintaining operational efficiency and preventing damage.

Correct Answers: A) Inadequate oil flow or circulation
B) Excessive friction due to worn or misaligned gears
C) High ambient temperature
E) Insufficient oil level

Explanation:

• Inadequate oil flow or circulation: Poor circulation can prevent effective cooling of the oil and gearbox components, leading to higher temperatures.
• Excessive friction due to worn or misaligned gears: Increased friction from worn or misaligned gears generates more heat, raising the oil temperature.
• High ambient temperature: An elevated ambient temperature can affect the gearbox's cooling efficiency, leading to higher oil temperatures.
• Insufficient oil level: Low oil levels can reduce the effectiveness of lubrication and cooling, causing the temperature to rise.

Note: While an overfilled oil reservoir and a faulty temperature sensor can affect gearbox performance, they are less direct causes of excessive oil temperature compared to the listed answers.