Questão 1
Questão
An essential auxillary in a gas turbine system is
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regenerator
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starting motor
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intercooler
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waste heat boiler
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combustor
Questão 2
Questão
A gas turbine is started in the following sequence of operation
1. air is heated in the combustor
2. air is drawn into the compressor
3. exhaust gases expand through the turbine
4. air is exhausted to atmosphere or hrsg
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1,2,3,4
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2,1,3,4
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4,2,3,1
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2,4,1,3
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3,1,2,4
Questão 3
Questão
Air choking in the high pressure end of the compressor is also termed:
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sputtering
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back-firing
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choking
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surging
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dead-heading
Questão 4
Questão
When starting a gas turbine in manual mode, what would be the first step
Questão 5
Questão
Water washing and adding chemicals to fuels that contain sodium or vanadium is primarily for
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reducing deposits on turbine blades
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reduce blade erosion
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lower exhaust gas temperatures
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reduce turbine blade erosion
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lower NOX emmisions
Questão 6
Questão
Major overhauls are performed on a gas turbine:
Questão 7
Questão
Which of the following components will reduce noise pollution from a gas turbine system:
1. inlet silencers
2. exhaust silencers
3. acoustic insulation
3. using axial air compressors
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1,2
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2,3,4
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1,2,4
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1,2,3
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1,2,3,4
Questão 8
Questão
Which interlocks need to be in the start position to start a gas turbine
1. oil pressure normal
2. dampers and ducting open
3. controls circuits energized
4. governer in start position
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1,2
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2,3,4
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1,2,4
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1,2,3
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1,2,3,4
Questão 9
Questão
Minor servicing carried out on a gas turbine:
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is done monthly
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is done annualy
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may only allow some adjusting to the combustor unit
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will include power turbine blade replacement
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will include compressor balancing and mechanical maintenance
Questão 10
Questão
when inspecting the flame tube of a gas turbine during a turnaround the operator should check for
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distortion
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proper ignition
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air flow restrictions
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scaling
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corrosion salts
Questão 11
Questão
combustion unit inspections and maintenance includes
1. cleaning
2. ignition checks
3. adjusting fuel flows
4. igniters and retraction gear tested
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1,2
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2,3,4
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1,2,4
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1,2,3
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1,2,3,4
Questão 12
Questão
The lubrication system on a gas turbine for be checked for:
1. leaks
2. water
3. dirt
4. metal particles
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1,2
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2,3,4
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1,2,4
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1,2,3
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1,2,3,4