3.8 Boiler Control systems

Description

Quiz on 3.8 Boiler Control systems, created by TRAVIS CANNING on 27/01/2016.
TRAVIS CANNING
Quiz by TRAVIS CANNING, updated more than 1 year ago
TRAVIS CANNING
Created by TRAVIS CANNING over 8 years ago
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Resource summary

Question 1

Question
A rapid increase in boiler load causes an immediate increase in steam flow from the boiler, which creates a sudden ____ in the boiler steam drum pressure
Answer
  • drop
  • increase
  • change
  • temperature

Question 2

Question
In a fuel flow - airflow combustion control system, the fuel flow signal makes the final adjustment to the ________
Answer
  • feedwater
  • fuel
  • airflow
  • drum level

Question 3

Question
In a fuel flow - airflow combustion control system, the fuel and airflows are measured directly and are converted to ________ signals by means of square root extractors
Answer
  • digital
  • parallel
  • proportional
  • output

Question 4

Question
By measuring and comparing the steam and the _____, it is possible to obtain efficient combustion in a boiler by maintaining a proper steam to airflow ratio
Answer
  • feedwater
  • fuel
  • airflow
  • drum level

Question 5

Question
With On - Off boiler feed water control, water is supplied ______ to the boiler, either by fully opening or fully closing a valve in the feedwater line.
Answer
  • partially
  • intermittenly
  • fully
  • steadily

Question 6

Question
A sudden increase in load, a decrease in drum pressure, and an immediate increase in heat release is called ________
Answer
  • rate
  • swell
  • shrinkage
  • condensing

Question 7

Question
Gas bypass method involves the seperation of the convection section of the boiler into two, or more, ______ gas passes
Answer
  • reverse
  • crossing
  • parallel
  • counter

Question 8

Question
The furnace pressure controller will adjust the boiler ____ dampers to keep the pressure constant at all boiler loads
Answer
  • outlet
  • inlet
  • air
  • burner

Question 9

Question
An oxygen analyzer can also be provided to indicate the excess oxygen in the flue gas, assisting the operator to control the excess air and increasing boiler _________
Answer
  • load
  • firing
  • temperature
  • efficiency
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