GTE PRACTICE TEST
gas turbine - ANSWER turbine-type engine which operates with
gas instead of steam as the working fluid
basic configuration of the gas turbine engine - ANSWER 1. A compressor
2. A combustor: to add energy to the compressed gas
3. A turbine to: extract power from the heated gas flow
gas turbines are used for - ANSWER 1. Electrical power generation
2. Pipeline pumping power
3. Marine propulsion
GAS TURBINE ADVANTAGES - ANSWER 1. Compact
2. Lightweight
3. Reliable
4. Efficient
5. Capable of rapid startup
6. Handle transient loading well
7. Capable of remote operation
8. Long service life
9. Long intervals between required maintenance
10. Low maintenance costs
, 11. A high power to weight ratio and good reliability
GAS TURBINE DISADVANTAGES - ANSWER 1. Gas turbines are high
performance engines with
many parts operating under high stress
2. Improper maintenance will impair performance
and may cause engine failure
3. Gas turbines produce a loud, high-pitched noise
that can cause hearing loss
4. Soundproofing needed
5. Affects installation and access
6. Technically complex
7. Repair or replacement may require shoreside
maintenance support
GAS TURBINE OPERATION - ANSWER 1. Air passes through the air inlet
duct into the compressor, which raises its pressure and temperature.
2. The air is then discharged into the combustion chamber(s), where fuel is
admitted by the fuel nozzle(s)
3. The fuel-air mixture is ignited by the igniter(s) and combustion takes place.
4. Hot gases are then directed toward the turbine rotor assembly.
5. Kinetic and thermal energy are extracted by the turbine, as gases acting on
turbine blades causes rotor rotation.
6. The rotor is connected to the compressor and rotates with the turbine.
7. Exhaust gases are discharged through the exhaust duct.
gas turbine - ANSWER turbine-type engine which operates with
gas instead of steam as the working fluid
basic configuration of the gas turbine engine - ANSWER 1. A compressor
2. A combustor: to add energy to the compressed gas
3. A turbine to: extract power from the heated gas flow
gas turbines are used for - ANSWER 1. Electrical power generation
2. Pipeline pumping power
3. Marine propulsion
GAS TURBINE ADVANTAGES - ANSWER 1. Compact
2. Lightweight
3. Reliable
4. Efficient
5. Capable of rapid startup
6. Handle transient loading well
7. Capable of remote operation
8. Long service life
9. Long intervals between required maintenance
10. Low maintenance costs
, 11. A high power to weight ratio and good reliability
GAS TURBINE DISADVANTAGES - ANSWER 1. Gas turbines are high
performance engines with
many parts operating under high stress
2. Improper maintenance will impair performance
and may cause engine failure
3. Gas turbines produce a loud, high-pitched noise
that can cause hearing loss
4. Soundproofing needed
5. Affects installation and access
6. Technically complex
7. Repair or replacement may require shoreside
maintenance support
GAS TURBINE OPERATION - ANSWER 1. Air passes through the air inlet
duct into the compressor, which raises its pressure and temperature.
2. The air is then discharged into the combustion chamber(s), where fuel is
admitted by the fuel nozzle(s)
3. The fuel-air mixture is ignited by the igniter(s) and combustion takes place.
4. Hot gases are then directed toward the turbine rotor assembly.
5. Kinetic and thermal energy are extracted by the turbine, as gases acting on
turbine blades causes rotor rotation.
6. The rotor is connected to the compressor and rotates with the turbine.
7. Exhaust gases are discharged through the exhaust duct.
