Environmental Engineering MCQs with Answers & Solutions — Page 3

The effective size of sand particles for rapid sand filters varies fromWater Treatment

The most suitable section of sewer in combined sewerage system is:Sewerage Systems

The Secondary treatment of sewage is carried out by the use ofWastewater Treatment

BOD 5 represents 5-day biochemical oxygen demand at temperature of:Wastewater Treatment

A septic tank isWastewater Treatment

As compared to stream water sea water containsWater Quality Parameters

Which of the following is classified as a secondary Air pollutant?Air Pollution

The acceptable noise level in ‘db’ for school building isNoise Pollution

The aerobic method of composting as practised in India is calledSolid Waste Management

Generally, water supply projects are designed for a design period ofWater Demand Estimation

The following is the effect of Nitrates impurities present in waterWater Quality Parameters

In the Water Treatment Plant, following process is adopted to remove colloidal impuritiesWater Treatment

Acceptable limit of Chlorides (as Cl) for drinking water as per IS 10500: 2012 isWater Quality Parameters

The following water distribution system is suitable for irregular developing town or cityWater Distribution Systems

Which of the following is used for measuring the Turbidity of water in the field?Water Quality Parameters

The sewerage system originates fromSewerage Systems

The most common method of wastewater disposal isDisposal of Sewage Effluents

If the sewage contains greases and fatty oils, they are removed inWastewater Treatment

For the design of sewers in India, the percentage of sewage discharge is assumed asSewerage Systems

Activated sludge is theWastewater Treatment

Leachate is a coloured liquid that comes out ofSolid Waste Management

Acceptable noise level for residential and business urban areas as per IS: 4954-1968 isNoise Pollution

The primary air pollutant which is formed due to incomplete combustion of organic matter isAir Pollution

Which of this is not a minor method of disinfection of water?Water Treatment

The Total Dissolved Solids (TDS) of the Swimming pool should not exceedWater Quality Parameters

Which of the following are the physical parameters of drinking water quality? 1.Turbidity 2.Odour 3.Hardness 4.TemperatureWater Quality Parameters

Chlorination is ineffective againstWater Treatment

The permissible limit of turbidity in drinking water (as per BIS) isWater Quality Parameters

Which of the following steps are correctly sequenced in conventional water treatment? 1.Coagulation 2.Sedimentation 3.Filtration 4.DisinfectionWater Treatment

Breakpoint chlorination ensuresWater Treatment

Zoning in water supply network helps inWater Distribution Systems

Which of the following are associated with slow sand filters? 1.Biological layer 2.High rate of filtration 3.Requires more area 4.Efficient removal…Water Treatment

The most common coagulant used in water treatment isWater Treatment

BOD removal in trickling filter occurs due toWastewater Treatment

The detention time in a primary settling tank is generallyWastewater Treatment

Sewage becomes septic due toWastewater Treatment

Sludge volume index indicatesWastewater Treatment

Anaerobic digestion of sludge producesWastewater Treatment

Biomedical waste is best treated bySolid Waste Management

Which of the following are recyclable? 1.PET bottles 2.Aluminum cans 3.Batteries 4.Food wasteSolid Waste Management

The various infiltration wells connected by porous pipes to a sump well is called asWater Intake Structures

The multiplying factor, as applied to obtain the peak hourly demand, in relation to the maximum daily demand is:Water Demand Estimation

Coincident draft in relation to water demand is based onWater Demand Estimation

Water is said to have one degree of hardness when its soap destroying power is equivalent to the effect of _______ of calcium carbonate in one litre…Water Quality Parameters

Hardness of water can be removed by boiling if it is due toWater Treatment

A water having pH value equal to 9 will have hydrogen ion concentration equal toWater Quality Parameters

The velocity of flow of water in a sedimentation tank is aboutWater Treatment

Pick out the incorrect statement for a rapid sand filter: (i). the period of cleaning is usually 2 to 3 weeks (ii). the effective size of the sand…Water Treatment

Which of the following chemical compounds can be used for dechlorination of water?Water Treatment

Which one of the following processes of softening water may require recarbonation?Water Treatment