Questão 1
Questão
A simple combined cycle power generation system can consist of:
Responda
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a single gas turbine generator
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a HRSG (heat recovery steam generator)
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A single steam turbine-generator
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condenser
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all of the above
Questão 2
Questão
One cause of corrosion in refuse-fired boilers is:
Responda
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chlorides
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fuels
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high temperatures
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sulphides
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nitrous oxides
Questão 3
Questão
The primary function of a recovery boiler is to process ________
Questão 4
Questão
In a Steam Flooding Boiler, In order to keep the salts in the boiler water dissolved and to avoid deposits on the tubes, the steam produced contains _______moisture.
Questão 5
Questão
In Black Liquor combustion, the liquor droplets must be ____ enough to minimize entrainement in the combustion gases.
Responda
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small
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large
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dispersed
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fine
Questão 6
Questão
Vibrating grates serve to aid combustion by ____ out the bed of burning biomass
Responda
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shaking
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leveling
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turning
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moving
Questão 7
Questão
Basic refuse incinerators with waste heat recovery have evolved into ____ boilers with integral stokers
Responda
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packaged
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fire tubed
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open harth
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water-wall
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black liquor
Questão 8
Questão
Which of the following are functions of the auxillary fuel burners in a Black Liquor Recovery Boiler:
1. Stabalize conditions during upsets in the black liquor feed
2. Produce extra steam
3. Burn out the char bed when shutting down.
4. Maintain furnace temperatures.
5. Sustain a stable ignition while establishing a char bed.
6. Raise steam during startup
Responda
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1,2,3
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1,2,3,5,6
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4,5,6,
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1,2,
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3,5
Questão 9
Questão
In a fluidized bed boiler, combustion can take place at temperatures ranging from ____ deg C to ____deg C instead of normal combustion temperatures of 1600 Deg C for pulverized coal and oil firing.
Responda
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300,500
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200,400
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800,900
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600,700
Questão 10
Questão
In a Black Liquor Recovery Boiler, If water contacts molten smelt, a violent explosion will result, it is not a ____ reaction but a _____ reaction
Responda
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chemical, physical
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Physical, Chemical
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Condensing, Evaporating
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Acid-base, Endothermic