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WorksheetsCASA B1-1 Module 15B Gas Turbine Engines
Total questions: 28
Worksheet time: 16mins
The correct oil specification for an engine type can be found in the following...
Aircraft Operator's Manual
Aircraft Maintenance Manual
Engine Maintenance Manual
Engine Oil Tank Service Placard
What components are used to aid in the transfer of heat in oil to the outside air/fuel
Air/oil cooler
Air cycle machine
Fuel/oil heat exchanger
Bypass valve
Which is NOT a desirable characteristic of synthetic oils
High viscosity index
Low volatility
High pour point
Low lacquer and coke deposits
The amount of pressure required to force out a film of oil from between two pieces of flat metal is referred to as...
film strength
volatility
pour point
viscosity point
True or False: A high flash point means that the oil must be heated to a high temperature to give off flammable vapours
True
False
Synthetic fluids routinely exhibit a nominal film strength that is ____ than mineral fluids
Higher
Lower
Equal
Viscosity is a fluids resistance to flow. What viscosity is more desirable in a gas turbine engine?
High Viscosity
Low Viscosity
There are 3 types of synthetic oils currently in use. Can you mix Type I with Type II oils?
Yes
No
Only in accordance with the AMM
What causes the gradual darkening effect in a synthetic oil?
Collection of coke, carbon and lacquer
Oxygen absorption
High viscosity
Water contamination
What factors can result in increased oil consumption
Higher RPM & Temperatures`
Larger Clearances
Less Viscosity
Ambient Pressure
What must you take into account when handling synthetic oils?
Read the SDS and use PPE
Never use silicon-based grease
Clean up spills immediately
What is the alternative name for JET B fuel?
AVGAS
AVTURB
JET A1
AVTAG
What are the disadvantages to using wide cut fuels in gas turbine engines?
Greater losses to evaporation at high altitudes
Greater risk of fire during handling
Crashes of planes with wide cut fuels were less survivable
Has a lower maximum freezing point than JET A1
What colour is used to identify JET A-1 fuel?
Grey
Yellow
Black
White
What colour is used to identify JET B fuel
White
Black
Grey
Yellow
For what purpose are fuel tanks fitted with a National Advisory Commitment for Aeronautics (NACA) scoop?
Increase vapour pressure
Reduce vapour pressure
Cool fuel tank
Overflow for the fuel tank
Jet A-1 has a ___ flash point than AVGAS
Higher
Lower
Equal
What is the easiest and most common method to find contaminants in a fuel sample?
Water finding paste
Dip stick
Drain into a clear glass container
Water contamination can be present in two forms. Which form can form into ice and be detrimental to engine operations?
Free/Suspended
Dissolved
What is the correct order of earthing when refueling an aircraft?
Person to Ground
Truck to Ground
Truck to Aircraft
Nozzle to Aircraft
Nozzle to Aircraft
Truck to Aircraft
Truck to Ground
Person to Ground
Person to Ground
Truck to Aircraft
Truck to Ground
Nozzle to Aircraft
Suction lines from a fuel storage tank must be placed ___ the bottom of the tank
Above
Below
Level with
Fuel spills are an environmental and fire risk. What must you do immediately?
Report to your supervisor & Clean up
Evacuate the ramp
Evacuate the aircraft
Contact the local fire authority
This image is an example of what type of contaminant?
Microbial
Swarf
Dissolved Water
Free water
In a wet-sump system, where is the oil supply located?
At the highest point in the engine
In the middle of the engine
In the rear of the engine
At the lowest point of the engine
In a dry-sump system, where is the oil supply located?
At the highest point in the engine
Separate Oil Reservoir within the Engine
Separate Oil Reservoir externally
At the lowest point of the engine
The component in a lubrication system used to hold sufficient oil to allow for engine consumption at maximum flight operation and duration is called
Wet sump
Dry sump
Oil tank
Oil reservoir
"Once the oil has lubricated the main bearings, it drains to low-lying areas, where scavenge pumps route it back to the sump or gearbox."
Which type of sump system is this?
Wet
Dry
Moist?
All oil reservoirs have an expansion space of at least...
10% or 0.5gal
5% or 0.10 gal
10% or 10 gal
5% or 0.5 gal
