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19 Cards in this Set
- Front
- Back
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SPL stands for? |
Sound pressure levels |
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According to the noise pollution graph what is the permissible range? |
50 to 80 dB |
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Maximum permitted noise exposure for 8 hours? Federal ________ Provincial _________ Quebec __________ |
87 85 90 |
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How is CO created in a boiler furnace? |
By incomplete combustion caused by a lack of oxygen |
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Carbon monoxide is _______explosive |
Very |
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With experience the power engineer should be able determine proper combustion 3 different ways. |
1. Appearance of the flame 2. The temperature of the gas at various points 3. Appearance of stack emissions |
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Sulphur oxides create acid _______ |
Rain |
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Three scrubbing methods used to remove sulphur oxides from emissions are? |
Lime/limestone scrubbing Double alkali systems Dilute sulphuric acid |
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Sulphuric acid scrubbing process is used to create what? |
Gypsum |
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When to much oxygen is used during the combustion process what gas is created? |
Nitrogen oxides |
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A sampling and analyzing train: A) Monitors flue gas for one type of emission B) Measures the amounts of several types of emissions C) Cannot be used to obtain permanent records D) Cannot be operated automatically E) Measures the frequency composition of noise |
B) Measures the amounts of several types of emissions |
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Sulphur oxides in flue gas are undesirable because they: A) Are an indicator of incomplete combustion in the furnace B) Contribute to acid rain C) Reduce combustion efficiency D) Use up the sulphur in the fuel E) Combine with sunlight to produce smog
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B) Contribute to acid rain |
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Nitrogen oxides in flue gas may be reduced by: A) Employing a dilute sulphuric acid scrubbing system B) Raising the furnace temperature C) Decreasing the size of the furnace D) Scrubbing the flue gas with lime E) Reducing the percentage of excess air |
E) Reducing the percentage of excess air |
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Gaseous pollutants emitted from power plants are: 1. Natural gas 2. Oxygen 3. Carbon monoxide 4. Sulphur dioxide 5. Nitrogen A) 2, 3, 4 B) 1, 3, 4 C) 3, 4, 5 D) 3, 4 E) 1, 5
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D) 3, 4 |
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Decibels are represented by a/an: A) Reference scale B) Logarithmic scale C) Arithmetic scale D) Exponential scale E) Intensity scale
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B) Logarithmic scale |
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Most systems used today to remove sulfur dioxide: A) Produce a useful end product B) Remove SO₂ in the furnace C) Are simple systems involving little extra equipment D) Remove most of the sulfur trioxide as well E) Involve the use of lime, limestone or sulphuric acid
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E) Involve the use of lime, limestone or sulphuric acid |
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Noise monitors (sound meters) measure the decibel rating and contain: A) Weighting networks B) Sound dampers C) Acoustic eliminators D) Acoustic amplifiers E) Sound amplifiers
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A) Weighting networks |
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A device for measuring flue gas emissions is called: A) A gas tester B) A level meter C) A dead weight tester D) A calorimeter E) A stack analyzer
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E) A stack analyzer |
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A method proven to reduce emissions of sulphur oxides in the flue gas is to: A) Increase the size of the furnace B) Reduce the amount of excess air C) Scrub the flue gas with lime or limestone D) Use dilute sulphuric acid to scrub the flue gas E) Lower the furnace temperature
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C) Scrub the flue gas with lime or limestone |
