Which of the following are the solid residues from incineration?
1.Slag, fly ash, APC
2.Klink, ash, BPC
3.Gas, slag, APC
4.Liquids, ash, slag
Anaerobic digestion is generally applied to BOD wastes above ________ ppm.
1.3000
2.6000
3. 9000
4.12000
Anaerobic treatment is mediated through _______
1.Enzyme catalysis
2.Enzyme
3.Chemical
4.Sulphur
Bio filters are fed with effluent only after ____________
1.Initial settlement
2.Bio-accumulation
3.Bio-degradation
4.Bio-magnification
Chemical precipitation is used in conjunction with neutralisation.
1.True
2.False
Chemical precipitation makes the hazardous waste _________
1.Soluble
2.Insoluble
3. Volatile
4.Acidic
Chemical precipitation treatment is effective in wastewater containing _______
1.Chemicals
2.Chloride
3.Toxic metals
4.Impurities
Chemical precipitation treatment is user economic.
1.True
2.False
Compensation for lower temperatures can be achieved by reducing hydraulic and organic loading rates thereby increasing _____________
1.Retention time
2.Mixing
3.Aeration
4.Sparging
Effective preliminary treatment can also be used to remove the ____
1.Girt and rag
2.Carbon dioxide
3.Nutrients
4.Oxygen
Evaporation of liquids from hazardous waste through multiple evaporator, distillation etc. is dependent on ________
1.Melting point
2.Freezing point
3.Boiling point
4.Vapour pressure
Evaporation units may be operated without obtaining a permit if ________
1.Chemicals are used
2.Resins are associated
3.Unit is enclosed
4.Waste is reused
Evaporator must have sufficient disc engaging space to achieve ________
1.Separation
2.Chemicals
3.Boiling
4.Pressure
Ferrous materials are combustible.
1.True
2.False
In the exposed lands, ______ are used to assist rotation during harsh weather conditions?
1.Wind vanes
2.Water sprayer
3.Flow bed
4.Motor drives
Ion exchange is an irreversible process.
1.True
2.False
Ion exchange is widely used to remove _________
1.Heavy metals
2.Toxic heavy metals
3.Minerals
4.Salts
Mechanical mixing of waste ensures ________
1.Flash point
2.Even distribution
3.Hydrocarbon mixing
4.Less water requirement
Most suitable treatment method for electroplating discharge is ____________
1.Reduction process
2.Ion exchange
3.Waste analysis
4.Chemical analysis
Non-methanogenic and methane-producing organisms effect anaerobic treatment.
1.True
2.False
Organic gas from condensation can be used as fuel.
1.True
2.False
Precipitation by ___________ is widely used method for treating hazardous waste.
1.Calcium hydroxide
2.Sodium hydroxide
3.Potassium hydroxide
4.Lead oxide
Residence time of waste in combustion zone is ________ seconds.
1.1
2.2
3.3
4.4
Resins can remove specific substances in a waste solution.
1.True
2.False
Sodium and potassium ions cause strong inhibition above ________ ppm.
1.10
2.100
3.1000
4.10000
Soluble ions of heavy metals are toxic above _______ ppm in industrial waste.
1.1
2.2
3.3
4.4
Steel tubes used in multiple effect evaporator are placed on surface.
1.True
2. False
The environmental issue caused by chemical precipitation is _________
1.Chemical silt
2.Salts
3.Liquid matter
4.Degradation
The gases produced from anaerobic degradation process are ________ and ________
1.Nitrogen, sulphur
2.Acetate, nitrate
3.Carbon, methane
4.Methane, sulphur
The residues produced from evaporation treatment is _________
1.Less
2.More
3.Undetermined
4. No residue
The temperature range for anaerobic process is ________ and ______ degree Celsius.
1.10-20, 20-30
2.32-37, 40-55
3.10-40, 40-55
4.10-50, 20-47
The treatability of the hazardous waste depends upon ________ content.
1.Carbon
2.Hydrocarbon
3.Nitrate
4.Sulphur
Thermal processing reduces hazard from waste.
1.True
2.False
Thermal treatment technologies are differentiated by ___________
1.Type of grate
2.Chemicals
3.Energy
4.Temperature
What is the emission limit for dioxins as per European Union?
1.0.1
2.0.2
3.0.3
4.0.4
Which of the following gas is toxic to methanogenic bacteria?
1.Carbon
2.Sulphur
3.Nitrogen
4. Oxygen
Which of the following is another name given to conventional bio filters?
1.Percolating filter
2.Filter cake
3.Injection recovery
4.Bio-luminescence
Which of the following is possible from ion exchange treatment?
1.Metal recovery
2.Oxidation reduction
3.Waste analysis
4.Chemical analysis
Which of the following is the end product of anaerobic degradation?
1.Liquor
2.Nitrogen
3.Lead
4.Sulphur
Which of the following parameters effect operating conditions of anaerobic treatment process?
1.Influent quality
2.Chemicals
3.Hydrocarbon
4. Sulphur
Which of the following resin can be used to remove copper plating rinse water?
1.ResinTech’s CG-8 (Na)
2.ResinTech’s CG-8 (K)
3.ResinTech’s CP-8 (Na)
4.ResinTech’s PG-8 (Na)
Which of the following waste characteristic is considered for combustion?
1.Flash point
2.Energy point
3.Burning point
4.Melting point
Which of the following waste is not applicable for evaporation?
1.Calcium
2.Iron
3.Copper
4.Methylene chloride
_______ is used for precipitation of heavy metals.
1.Calcium hydroxide
2.Lime
3.Potassium hydroxide
4. Lead oxide
_______ treatment is suitable for metal salts bearing wastes.
1.Neutralisation
2.Chemical precipitation
3.Hydrolysis
4.Solvent extraction
________ % of waste by weight remains after combustion.
1.20-35
2.20-40
3.40-50
4.30-50
________ emission is cited as an issue from incineration?
1.Carbon
2.Dioxin
3.Sulphur
4.Nitrogen
________ of hazardous waste plays a major role in designing combustion unit.
1.Calorific value
2.Chemical value
3.Energy value
4.Fuel value
_________ wastes can be treated in evaporator.
1.Aqueous inorganic
2.Organic
3.Aqueous organic
4.Dry
__________ from combustion of waste reduces cost.
1.Chemical analysis
2.Metals
3.Material recovery
4.LCA