MDE 20 End of Unit Quiz

MDE 20 End Of Unit Quiz

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Question 3:
With reference to reduction gearing, why is achieving a precise surface finish on gear teeth important for the gear's lifespan?

B) It reduces the chances of tooth breakage and premature wear

C) It simplifies the manufacturing process

A) It enhances the aesthetic value of the gear

D) It increases the gear's overall weight

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Question 1:
Why is oil spraying preferred over a wet sump for lubricating main reduction gearing?

A) Oil sprayers provide better cooling

C) Wet sump systems are more expensive

B) Oil sprayers deliver more uniform lubrication

D) Wet sump systems are more complex

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Question 2:
What is a primary reason for pre-lubricating the main reduction gearing before it rotates?

D) To prevent gear tooth chipping

A) To flush out contaminants

C) To increase gear tooth hardness

B) To ensure smooth gear engagement

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Question 4:
What advantage do helical gears have over spur gears in terms of operational noise?

D) No effect on operational noise

A) Higher operational noise

B) Lower operational noise

C) Equal operational noise

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Question 1:
What is the first step to take if you discover water contamination in the gearbox oil?

A) Continue operating the gearbox to check for changes

D) Add a water-soluble additive to the oil

C) Drain the contaminated oil from the gearbox

B) Increase the operating temperature to evaporate the water

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Question 4:
What is one of the potential effects of water contamination on the operational performance of a gearbox?

A) Improved energy efficiency

B) Increased operational temperature

C) Reduced gear backlash

D) Enhanced load capacity

Answer: B) Increased operational temperature

Explanation: Water contamination can lead to increased operational temperatures due to decreased lubrication efficiency and higher friction. This can cause overheating and potentially damage the gearbox.

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Question 2:
What is a key advantage of using oil sprayers in the lubrication of main reduction gearing?

A) Reduced oil consumption

B) Improved oil filtration

D) Simpler system design

C) Enhanced oil distribution and reduced wear

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Question 3:
Which fault is indicated by visible cracks on gear teeth?

A) Gear tooth flaking

B) Gear tooth pitting

C) Gear tooth chipping

D) Gear tooth cracking

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Question 2:
What is a typical sign of gear tooth scuffing?

D) Excessive play between meshing gears

B) Presence of cracks and chips on the gear surface

A) Uniform wear across the gear teeth

C) Rough, burnt appearance on the gear teeth

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Question:
How may gearbox oil become contaminated with water?

B) By direct exposure to rain or sea spray

D) Through the use of low-quality lubricants

A) Through leaks in the cooling system

C) By condensation forming inside the gearbox

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Question 5:
Which of the following is NOT a benefit of supplying lubricating oil to main reduction gearing before it rotates?

D) Minimizing initial friction

A) Preventing metal-to-metal contact

C) Improving gear tooth profile

B) Reducing startup noise

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Question 2:
Which of the following is a common visual inspection technique used for a gearbox?

B) Measuring the temperature of the gearbox

C) Inspecting for oil leaks and contamination

D) Adjusting the gear mesh

A) Checking the oil level

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