Review Quiz: Air Quality And Environment! Hardest Trivia
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This exam was offered as part of A&WMA's online course, "GENAQ-100E: Environmental Practices Review Specialty Course: Air Quality" in 2008.
- 1.Air is a non-homogeneous mixture of gases, solid particles and liquids.
- A.
True
- B.
False
- 2.Most household cleaning products and paints contain:
- A.
Metals
- B.
Volatile organic compounds
- C.
Carbon dioxide
- D.
Nitrogen oxides
- 3.The portion of the atmosphere closest to the earth is called the:
- A.
Stratosphere
- B.
Ionosphere
- C.
Mesosphere
- D.
Troposphere
- 4.By weight how much of the air is contained in the portion of the atmosphere closest to the earth:
- A.
60%
- B.
75%
- C.
80%
- D.
95%
- 5.Which of the following is not a secondary pollutant:
- A.
Nitrates
- B.
Ozone
- C.
SO2
- D.
Sulfates
- 6.Which of the following is not a criteria pollutant:
- A.
Formaldehyde
- B.
Carbon monoxide
- C.
Lead
- D.
Total suspended particulate
- E.
PM-10
- 7.Carbon monoxide has a 500 times greater affinity to hemoglobin in the blood than oxygen.
- A.
True
- B.
False
- 8.Most carbon monoxide deaths are caused by faulty heating systems
- A.
True
- B.
False
- 9.During high temperature combustion what is the predominant type of NOx that is formed:
- A.
NO2
- B.
N2O5
- C.
NO
- D.
None of the above
- 10.Generally the higher the combustion temperature the greater amount of NOx is formed.
- A.
True
- B.
False
- 11.High Ozone levels typically are experienced during periods of :
- A.
Unstable Low Atmospheric Pressure and high temperatures
- B.
Stable High Atmospheric Pressure and high temperatures
- C.
Turbulent mixing in the atmosphere
- D.
Inversions
- 12.
- A.
NOx
- B.
SO2
- C.
CO
- D.
VOC
- 13.Particulate matter is either a solid or a liquid during standard atmospheric conditions.
- A.
True
- B.
False
- 14.PM-10 particles have a settling time of approximately:
- A.
3.6 m/hr
- B.
2.0 m/hr
- C.
0.4 m/hr
- D.
Negligible
- 15.From lowest to highest list the following fuels in relationship to their sulfur content:a. Bituminous coalb. No. 2 fuel oilc. No. 6 fuel oild. Natural gase. Antracite coal
- A.
B, c, d, e, a
- B.
D, b, c, e, a
- C.
B, c, d, a, e
- D.
D, b, c, a, e
- 16.
- A.
SO2
- B.
NOx
- C.
CO
- D.
CO2
- 17.What is the typical pH of natural rainfall?
- A.
3.5
- B.
5.5
- C.
6.0
- D.
7.5
- 18.The smallest particle size collected at 100% efficiency in a cyclone is known as:
- A.
Cut size
- B.
Geometric size
- C.
Aerodynamic mean size
- D.
Critical size
- 19.The average velocity through a 4ft. X 5ft. diameter rectangular stack is 30 feet / sec. What is the volume in acfm?
- A.
600
- B.
60
- C.
3,600
- D.
36,000
- 20.The exhaust from a baghouse stack has a concentration of 0.2 gr./dscf. Given an exhaust of 10,000 scfm what is the emission rate in lbs./hr?
- A.
1.0
- B.
1.7
- C.
3.4
- D.
5.0
- 21.How many cylindrical bags, 6 inches in diameter and 25 feet long, would be needed to filter a particulate laden stream? The total filtering surface area is 4045 square feet.
- A.
15
- B.
25
- C.
103
- D.
150
- E.
300
- 22.What are the two basic mechanisms for particulate collection in a fabric collector:
- A.
Diffusion and precipitation
- B.
Impaction and interception
- C.
Agglomeration and diffusion
- D.
Electrostatic attraction and agglomeration
- 23.The type of flow in a stack is defined by:
- A.
Avagadros Number
- B.
Atomic number
- C.
Reynolds Number
- D.
Bernoulli's Equation
- 24.A coal fired boiler is controlled by a spray dryer, a baghouse, and SCR. Match the pollutant with the control device used:SOxNOxParticulate
- A.
Particulate - baghouse SOx - spraydryer NOx - SCR
- B.
Particulate - spraydryer NOx - baghouse SOx - SCR
- C.
NOx - SCR SOx - spraydryer Particulate - baghouse
- 25.The above collectors are arranged in:
- A.
Series
- B.
Parallel
- 26.In a reverse air baghouse, particulate is collected on:
- A.
The inside of the bag
- B.
The exterior of the bag
- 27.The inlet temperature to a baghouse needs to be above the dewpoint to prevent blinding the bags by condensing moisture in the gas.
- A.
True
- B.
False
- 28.Which of the fabrics listed below would have a good resistence to acid and alkaline attack and also have a high temperature limitation?
- A.
Cotton
- B.
Wool
- C.
Polyester
- D.
Gortex
- 29.An example of a high energy scrubber would be a:
- A.
Spray tower
- B.
Contact absorber
- C.
Venturi scrubber
- D.
Centrifugal scrubber
- 30.Henry's law applies if the equilibrium diagram of a system is a straight line. For most systems, the equilibrium diagram is a straight line if:
- A.
The solution is concentrated
- B.
The solution is dilute
- C.
Water is the solute
- D.
The partial pressure of the absorbate is large
- 31.In air pollution applications, chemical adsorption is preferable to physical adsorption.
- A.
True
- B.
False
- 32.The exhaust from a boiler has a CO concentration with a partial pressure of 19.0 mm HG. Given a standard pressure of 760 mm HG what is the ppm of CO in exhaust?
- A.
2,500
- B.
5,000
- C.
25,000
- D.
50,000
- 33.What is a flue gas treatement process that can be used to reduce NOx in a combustion unit:
- A.
Electrostatic precipitation
- B.
Selective catalytic reduction
- C.
Limestone injections
- D.
Carbon injections
- 34.What formula represents the ideal gas law?
- A.
PV=nRT
- B.
PVM = RTstd
- C.
V = TP
- D.
PV = MwRT
- 35.If a certified Method 9 observer reads 75% opacity, how much light transmission can be seen through the plume?
- A.
10%
- B.
25%
- C.
50%
- D.
75%
- 36.The Discharge Electrode in an Electrostatic Precipitator is usually:
- A.
Neutrally charged
- B.
Positively charged
- C.
Negatively charged
- 37.An inversion condition exists when you have:
- A.
Cool air above warm air
- B.
No wind
- C.
Cumulus clouds
- D.
Warm air above cool air
- 38.In the absorption process you have the transfer of a gaseous component from the gas phase to the liquid phase.
- A.
True
- B.
False
- 39.In an absorber, if the temperature of the liquid increases the solubility of the gaseous component into the liquid normally:
- A.
Stays the same
- B.
Increases
- C.
Decreases
- 40.The attractive forces that hold a gas to the surface of a solid are known as:
- A.
Negatively charged forces
- B.
Van der Waals Forces
- C.
Positively charged forces
- D.
Henry's Law Force
- 41.The principal commercial adsorbent used for the adsorption of organic vapors is:
- A.
Silica gel
- B.
Carbon
- C.
Alumina
- D.
Stainless steel mesh
- E.
Zeolite
- 42.A packed countercurrent flow absorber is more efficient than a spray tower because:
- A.
The pressure drop increases
- B.
The tank diameter is usually larger
- C.
The tower height is increased
- D.
The gas-liquid interfacial area is increased
- 43.A condenser is not an effective way to control alcohol vapors.
- A.
True
- B.
False
- 44.Which of the following oxidizers would be the most cost effective?
- A.
Thermal oxidizer
- B.
Regenerative thermal oxidizer
- C.
Catalytic oxidizer
- 45.In the combustion process, if you need two moles of oxygen to combust one mole of methane, how many moles of air would be needed?
- A.
2
- B.
3.99
- C.
7.53
- D.
9.53
- E.
13.28
- 46.NOx control is usually accomplished through what process?
- A.
Absorption
- B.
Reduction
- C.
Oxidation
- D.
Adsorption
- 47.In the combustion of natural gas, most of the NOx produced is considered:
- A.
Fuel NOx
- B.
Thermal NOx
- C.
Residual NOx
- 48.Which of the following fuels would have the highest nitrogen content:
- A.
Natural gas
- B.
No. 2 oil
- C.
No. 6 oil
- D.
Coal
- 49.Bituminous coal fired utilities usually use what process to control SO2?
- A.
Limestone process
- B.
Dry scrubbing
- C.
Magnesium oxide process
- D.
Dry injection
- 50.Emission inventories are usually required for all stationary sources regardless of their size.
- A.
True
- B.
False
- 51.In the combustion process, if excess air is provided the mixture is considered to be:
- A.
Rich
- B.
Lean
- 52.The PM-2.5 sampling refers to:
- A.
Particulate greater than 2.5 microns
- B.
Particulate less than 2.5 microns
- C.
All particle matter in a stack
- D.
The particles collected in the back half of a sampling train
- 53.If pollutants from an elevated, buoyant source can be carried down to the ground when a nocturnal surface inversion is dissipated by datime heating, you normally have a process called:
- A.
Fanning
- B.
Looping
- C.
Coning
- D.
Fumigation
- 54.In the stack sampling process, isokinetic sampling is needed when sampling for:
- A.
Particulates
- B.
NOx
- C.
Sulfur Oxides
- D.
Carbon Monoxide
- 55.Most risk assessments values derived for exposure hazardous wastes and materials are given in terms of:
- A.
Birth defects
- B.
Cancer risks
- C.
Mutagenic effects
- D.
Reproduction dysfunctions
- 56.Which of the following is not a chronic health effect?
- A.
Genetic damage
- B.
Degenerative illness
- C.
Mercury build-up
- D.
Immediate exposure
- 57.Federal Land Managers are most interested in reducing what in Class 1 areas:
- A.
SO2
- B.
NOx
- C.
Visibility
- D.
Particulate matter
- 58.Most gaseous continuous emissions monitors (CEMs) are:
- A.
Extractive monitors
- B.
In-situ monitors
- C.
Remote monitors
- D.
In line gas analysis
- 59.The most common approach to dispersion modeling is a gradient modeling approach.
- A.
True
- B.
False
- 60.Which of the following inventories is not needed in conducting an ozone model?
- A.
Mobile sources
- B.
Biogenic
- C.
Point source
- D.
Toxic release inventory
- 61.Which type of inventory can be considered the most reliable?
- A.
Point source
- B.
Mobile source
- C.
Area source
- D.
Natural source
- 62.Standard particulate source testing is conducted under what EPA method?
- A.
Method 3
- B.
Method 4
- C.
Method 5
- D.
Method 25
- 63.What Title of the 1990 Clean Air Act deals with Toxic Pollutants:
- A.
Title I
- B.
Title III
- C.
Title IV
- D.
Title V
- 64.What source sampling method is used to determine total gaseous non-methane organic emissions using a flame ionization detector?
- A.
Method 25
- B.
Method 25A
- C.
Method 25B
- D.
Method 20
- 65.Visible light occurs in the 400-700 nm range with the red around 400 and the violets around 700.
- A.
True
- B.
False
- 66.When studying the absorption of light gases, what law is uesed to relate the amount of light absorbed to the concentration of the gas?
- A.
Ideal Gas Law
- B.
Henry's Law
- C.
Beer-Lambert Law
- D.
Avogadro Principal
- 67.Opacity monitors are typically:
- A.
In-situ monitors
- B.
Extractive monitors
- C.
Remote monitors
- 68.What is the molecular weight of air assuming there is 79% nitrogen and 21% oxygen:
- A.
24.82
- B.
28.84
- C.
32.4
- D.
39.9
- 69.If you had a coal with a BTU content of 10,000 BTU/lb, and 2.5% S and all of it is emitted into the atmosphere, what would be the emission rate in lbs/MM BTU?
- A.
2.5
- B.
4.0
- C.
5.0
- D.
10
- 70.Which of the following would not be a fugitive emission?
- A.
Baghouse exhaust
- B.
Open burning
- C.
Road dust
- D.
Building vent
- 71.Good engineering practice stack height is generally considered:
- A.
1.5 x bldg. ht.
- B.
2.0 x bldg. ht.
- C.
2.5 x bldg. ht.
- D.
5.0 x bldg. ht.
- E.
Above 150 feet
- 72.A pound of activated carbon has a surface area equal to about:
- A.
5 acres
- B.
25 acres
- C.
75 acres
- D.
125 acres
- 73.Stage II collection at gasoline stations refers to the control of gaseous vapors from the underground storage tank.
- A.
True
- B.
False
- 74.A cascade impactor stage's cut size separate ___% of the particles of that size:
- A.
15
- B.
50
- C.
84
- D.
100
- 75.Indoor air quality is strongly affected by:
- A.
Outside temperature
- B.
The number of air changes per hour
- C.
Wind speed
- D.
House insulation
- 76.Which of the following is not a common exposure route for environmental contaminants:
- A.
Injection
- B.
Inhalation
- C.
Ingestion of food
- D.
Ingestion of water
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