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Power prep quiz 9

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power engineering 3b2 Quiz on Power prep quiz 9, created by TRAVIS CANNING on 28/02/2016.
TRAVIS CANNING
Quiz by TRAVIS CANNING, updated more than 1 year ago
TRAVIS CANNING
Created by TRAVIS CANNING almost 10 years ago
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Resource summary

Question 1

Question
An essential auxillary in a gas turbine system is
Answer
  • regenerator
  • starting motor
  • intercooler
  • waste heat boiler
  • combustor

Question 2

Question
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
Answer
  • 1,2,3,4
  • 2,1,3,4
  • 4,2,3,1
  • 2,4,1,3
  • 3,1,2,4

Question 3

Question
Air choking in the high pressure end of the compressor is also termed:
Answer
  • sputtering
  • back-firing
  • choking
  • surging
  • dead-heading

Question 4

Question
When starting a gas turbine in manual mode, what would be the first step
Answer
  • start the starting motor
  • engage the ignitors
  • load the power turbine
  • engage the turning gear
  • start the auxillary systems

Question 5

Question
Water washing and adding chemicals to fuels that contain sodium or vanadium is primarily for
Answer
  • reducing deposits on turbine blades
  • reduce blade erosion
  • lower exhaust gas temperatures
  • reduce turbine blade erosion
  • lower NOX emmisions

Question 6

Question
Major overhauls are performed on a gas turbine:
Answer
  • annualy
  • when performance is poor
  • monthly
  • according to the manufacturers specifications
  • during off-peak hours

Question 7

Question
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
Answer
  • 1,2
  • 2,3,4
  • 1,2,4
  • 1,2,3
  • 1,2,3,4

Question 8

Question
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
Answer
  • 1,2
  • 2,3,4
  • 1,2,4
  • 1,2,3
  • 1,2,3,4

Question 9

Question
Minor servicing carried out on a gas turbine:
Answer
  • is done monthly
  • is done annualy
  • may only allow some adjusting to the combustor unit
  • will include power turbine blade replacement
  • will include compressor balancing and mechanical maintenance

Question 10

Question
when inspecting the flame tube of a gas turbine during a turnaround the operator should check for
Answer
  • distortion
  • proper ignition
  • air flow restrictions
  • scaling
  • corrosion salts

Question 11

Question
combustion unit inspections and maintenance includes 1. cleaning 2. ignition checks 3. adjusting fuel flows 4. igniters and retraction gear tested
Answer
  • 1,2
  • 2,3,4
  • 1,2,4
  • 1,2,3
  • 1,2,3,4

Question 12

Question
The lubrication system on a gas turbine for be checked for: 1. leaks 2. water 3. dirt 4. metal particles
Answer
  • 1,2
  • 2,3,4
  • 1,2,4
  • 1,2,3
  • 1,2,3,4
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