Recap Module 15.9 and 15.10 (part 1)

What type of oil system is usually found on gas turbine engines?

• Wet sump and Dry sump

• Dry sump and pressure

• Wet sump and pressure

Which of the following is the primary function of the lubrication system in a gas turbine engine?

• Reducing fuel consumption

• Filtering the air intake

• Providing lubrication to moving parts

which one of the statements below is incorrect regarding the requirements of lubricants?

• Viscosity is an important property of lubricants

• 1. Lubricants must have low thermal stability to avoid damaging the engine components.

• lubricants must have a high anti-friction Characteristics

What happens to the oil after it passes through the engine's moving parts in a total loss system?

• It is cooled before being recirculated

• It is drained from the engine and discarded

• It is filtered before being recirculated

In the recirculatory system, what happens to the oil after it passes through the engine components?

• It is filtered and then returned to the engine components

• It is discharged from the system and replaced with fresh oil

• It is returned to the oil reservoir for reuse

Which characteristic of gas turbine engine lubricants contributes to their high anti-friction properties?

• Additive package

• Pour point

• Good conductor of heat

What is the primary advantage of the recirculatory system compared to the total loss system?

• Simpler maintenance and filter replacements

• Reduced oil consumption and waste

• Higher oil capacity for extended operation.

Which of the following is a potential drawback of the total loss system compared to the recirculatory system?

• Increased complexity of the lubrication system.

• Reduced engine efficiency due to higher oil consumption

• Higher maintenance requirements for oil filters

Answer explanation

A potential drawback of the total loss system compared to the recirculatory system is the higher oil consumption, which can lead to reduced engine efficiency. Since the total loss system continually introduces fresh oil and does not recirculate or filter the oil, it tends to have higher oil consumption compared to the recirculatory system, which can impact overall engine efficiency.

Which of the following best describes the purpose of lubricants in a gas turbine engine?

• 
  To increase the engine's thrust output

• To reduce friction and wear between moving parts

• To provide fuel for combustion

Which lubrication system is more commonly used in smaller gas turbine engines or engines with specific design requirements?

• Total loss system

• Wet sump system

• Recirculatory system