The lubrication oil system of a gas turbine must be checked for:
1. Metal particles
2. Water contamination
3. Dirt contamination
4. Leaks

Aero-derivative gas turbines normally use _______ bearings:

Micro-turbines normally use ______ bearings:

Auxillary systems on gas turbines are needed to:
1. Provide fuel at the proper temperature and pressures
2. Clean and treat fuels
3. Provide hydraulic fluid for bearing lubrication
4. Inject steam to clean the ducts and housing
5. Provide anti-icing

The exhaust of a gas turbine most commonly contains:
1. Nitrogen oxides
2. Sulphur dioxide
3. Particulate matter
4. Carbon monoxide

Gas turbine oil systems consist of these basic components:
1. An oil reservoir to ensue an adequate supply of oil
2. Filters to ensure the oil is clean
3. Pumps to provide pressure
4. Coolers to ensure oil temperatures are kept within operating limits
5. Protective, monitoring and control devices

All piping, fittings and reservoir use _____ to prevent corrosion.

Gas turbine lubricating oil systems provide the basic functions of:
1. Lubricating sliding surfaces in the bearings
2. Sealing out dirt and moisture
3. Cooling the bearings
4. Sealing the gas passages

Exhaust systems are required on Gas turbines to:
1. Allow the installation of silencers
2. Allow the installation of heat recovery equipment
3. Direct the flow to heat recovery systems
4. Minimize power losses
5. protect operators

A mandatory auxillary in a gas turbine installation is a/an: