MDE Unit 20 reduction gearing Flashcards

MDE Unit 20 reduction gearing

Question 5:
To prevent future water contamination of the gearbox, what preventive measure should be implemented?

B) Install proper seals and gaskets to prevent water ingress

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

Question 5:
How does the use of oil sprayers impact the efficiency of main reduction gearing lubrication?

B) It improves the oil film strength on gears

Question 4:
Why might oil sprayers be more effective than a wet sump system for high-speed main reduction gears?

C) They provide targeted and controlled lubrication

Question 7:
In a lubricating oil system for reduction gearing, what is the purpose of the temperature sensor?

C) To monitor and control oil temperature

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

C) Drain the contaminated oil from the gearbox

Question 1:
What is the primary purpose of inspecting a gearbox?

B) To verify the alignment and condition of the gears

Question 2:
How does water contamination affect the viscosity of gearbox oil?

B) It decreases viscosity significantly

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

C) Rough, burnt appearance on the gear teeth

Question 4:
What tool is often used to measure the backlash in a gearbox?

B) Dial gauge

Question 3:
What is a potential drawback of relying on a wet sump system for main reduction gearing lubrication?

B) Inadequate oil delivery to high-speed gears

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

D) Gear tooth cracking

Question 5:
What is the purpose of using ultrasonic testing in the condition monitoring of main reduction gearing?

B) To detect internal defects or cracks

Question 2:
Which condition monitoring technique involves analyzing the lubricant for signs of wear particles and contamination?

B) Oil analysis

Question 1:
Which of the following condition monitoring techniques is commonly used to assess the vibration levels of main reduction gearing?

B) Vibration analysis

Question 3:
What is a common consequence of water contamination in gearbox oil on the gears?

B) Corrosion and rust formation

Question 7:
What action should be taken if abnormal noise is detected during a gearbox inspection?

C) Investigate and repair the source of the noise

Question 1:
With reference to reduction gearing, why is the surface finish of gear teeth critical for operational efficiency?

C) It influences the smoothness of the gear operation and reduces friction

Question 1:
Which of the following is an advantage of helical gear teeth over spur gear teeth?

D) Increased load capacity

Question 3:
Which protective device in the lubricating oil system helps to prevent damage from excessive oil pressure?

B) Pressure Relief Valve

Question 2:
What is the primary function of the oil cooler in a lubricating oil system for reduction gearing?

B) To cool the lubricating oil

Question 4:
What does the oil pump do in the lubricating oil system for reduction gearing?

C) Circulates the oil through the system

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

C) Improving gear tooth profile

Question 6:
Which of the following is a potential cause of gear tooth flaking?

A) Inadequate gear surface hardening

Question 6:
What is a primary reason for not relying on a wet sump system for lubrication of main reduction gearing?

B) Insufficient oil coverage due to gear rotation speed

Question 5:
Regarding maintenance, which of the following is a disadvantage of double helix gears?

C) More complex alignment and maintenance

Question 1:
What is a primary advantage of double helix gears over single helix gears?

B) Higher load capacity

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

B) Lower operational noise

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

B) Oil sprayers deliver more uniform lubrication

Question 1:
In a block diagram of a lubricating oil system for reduction gearing, which component is responsible for filtering contaminants from the oil?

C) Oil Filter

Question:
With reference to reduction gearing, what is the primary purpose of the magnetic filter in the lubricating oil system?

C) To attract and remove ferrous particles and metal debris from the oil

Question 5:
In the block diagram of a lubricating oil system, which component is used to monitor and maintain the oil level?

B) Oil Level Gauge

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

C) Enhanced oil distribution and reduced wear

Question 6:
Which of the following is a sign of gear tooth damage that should be noted during a gearbox inspection?

B) Cracks or chips on the gear teeth

Question 2:
One disadvantage of helical gears compared to spur gears is:

 

B) Higher manufacturing costs

Question 1:
Why should lubricating oil be supplied to the main reduction gearing before it starts rotating?

C) To provide initial lubrication and reduce wear

Question 4:
What should be done if there is evidence of damage to the gearbox components due to water contamination?

B) Perform an immediate repair or replacement of damaged components

With reference to reduction gearing, why is EP (Extreme Pressure) lubricating oil preferred?

B) It provides excellent protection against wear and extreme pressure conditions

Question 4:
Which technique is used to assess the noise generated by main reduction gearing and diagnose potential faults?

A) Acoustic emission testing

Question 2:
With reference to reduction gearing, how does a poor surface finish on gear teeth impact the gear's performance?

B) It can cause increased noise and vibration

Question 5:
What fault might be observed if gear teeth exhibit a jagged, uneven surface?

C) Gear tooth chipping

Question:
How may gearbox oil become contaminated with water?

C) By condensation forming inside the gearbox

Question 3:
Which of the following is a disadvantage of helical gears compared to spur gears?

B) Increased axial load

Question 3:
How can you confirm that the gearbox has been properly cleaned and the contamination removed?

D) By conducting a thorough inspection and ensuring no water remains

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

B) To ensure smooth gear engagement

Question 5:
What should be checked to assess the condition of the gearbox bearings during an inspection?

A) Bearing temperature and noise levels

Question 6:
Which component in the lubricating oil system helps to separate air from the oil?

B) Air Separator

Question 3:
Which of the following methods can be used to detect heat build-up in the main reduction gearing?

 

C) Thermography

Question 4:
What is a common result of gear tooth wear due to improper lubrication?

D) Gear tooth pitting

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

C) Inspecting for oil leaks and contamination

Question 1:
Which of the following is a common cause of gear tooth pitting?

 

A) Excessive load and poor lubrication

Question 3:
One advantage of double helix gears is their effect on axial thrust. What is this effect?

B) Double helix gears produce lower axial thrust.

Question 3:
What could be a consequence of not supplying lubricating oil before the main reduction gearing starts rotating?

C) Accelerated gear wear and damage

Question 4:
How does supplying lubricating oil before rotation help with the temperature management of the main reduction gearing?

B) By dissipating heat generated during initial contact

Question 5:
Which of the following is an advantage of helical gears in terms of their load distribution?

B) More uniform load distribution

Question 4:
What is a key disadvantage of double helix gears in terms of noise and vibration compared to single helix gears?

B) Double helix gears generate more noise and vibration.

Question 2:
Which of the following is a disadvantage of double helix gears compared to single helix gears?

A) Increased manufacturing complexity

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

B) Increased operational temperature

Question 4:
With reference to reduction gearing, what role does the surface finish of gear teeth play in the efficiency of power transmission?

C) It helps to minimize energy losses due to friction and improves efficiency

Question 3:
During a gearbox inspection, which component should be checked for excessive wear?

 

A) Gear teeth

Question 2:
After draining the contaminated oil from the gearbox, what should be done next?

A) Replace it with fresh, clean oil

Question 5:
What should be done if water contamination is detected in the gearbox oil?

B) Drain the contaminated oil and replace it with fresh oil

Question 1:
What is one of the primary effects of water contamination in gearbox oil?

B) Increased friction and wear
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