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Free download in PDF Environmental Engineering MCQS and Answers for competitive exams. These short objective type questions with answers are very important for competitive exams as well as Board exams. These short solved questions or quizzes are provided by Gkseries.
81
The per capital consumption of a locality is affected by
i) climatic conditions
ii) quality of water
iii) distribution pressure
The correct answer is
[A]
only (i)
[B]
both (i) and (ii)
[C]
both (i) and (iii)
[D]
all (i), (ii) and (iii)
Answer: all (i), (ii) and (iii)
82
The hourly variation factor is usually taken as
[A]
1.5
[B]
1.8
[C]
2.0
[D]
2.7
83
The distribution mains are designed for
[A]
Maximum Daily Demand
[B]
Maximum Hourly Demand
[C]
Average Daily Demand
[D]
Maximum Hourly Demand On Maxi¬Mum Day
Answer: Maximum Hourly Demand On Maxi¬Mum Day
84
As compared to geometrical increase method of forecasting population, arithmetical increase method gives
[A]
Lesser Value
[B]
Higher Value
[C]
Same Value
[D]
Accurate Value
85
The suitable method of forecasting popu¬lation for a young and rapidly increasing city is
[A]
Arithmetical Increase Method
[B]
Geometrical Increase Method
[C]
Incremental Increase Method
[D]
Graphical Method
Answer: Geometrical Increase Method
86
The depression of water table in a well due to pumping will be maximum
[A]
At A Distance R From The Well
[B]
Close To The Well
[C]
At A Distance R/2 From The Well
[D]
None Of The Above
Answer: Close To The Well
87
The devices which are installed for drawing water from the sources are called
[A]
Aquifers
[B]
Aquiclude
[C]
Filters
[D]
Intakes
88
The type of valve, which is provided on the suction pipe in a tube-well, is
[A]
Air Relief Valve
[B]
Reflux Valve
[C]
Pressure Relief Valve
[D]
Sluice Valve
89
As compared to shallow-wells, deep wells have
[A]
More Depth
[B]
Less Depth
[C]
More Discharge
[D]
Less Discharge
90
Ground water is usually free from
[A]
Suspended Impurities
[B]
Dissolved Impurities
[C]
Both Suspended And Dissolved Impuri¬Ties
[D]
None Of The Above
Answer: Suspended Impurities
91
The polluted water is one which
[A]
Contains Pathogenic Bacteria
[B]
Consists Of Undesirable Substances Rendering It Unfit For Drinking And Domestic Use
[C]
Is Safe And Suitable For Drinking And Domestic Use
[D]
Is Contaminated
Answer: Consists Of Undesirable Substances Rendering It Unfit For Drinking And Domestic Use
92
The phenolic compounds in public water supply should not be more than
[A]
0.1 ppm
[B]
0.01 ppm
[C]
0.001 ppm
[D]
0.0001 ppm
93
Standard EDTA (ethylene diamine tetra acetic acid) solution is used to determine the
[A]
Hardness In Water
[B]
Turbidity In Water
[C]
Dissolved Oxygen In Water
[D]
Residual Chlorine In Water
Answer: Hardness In Water
94
Alkalinity in water is expressed as milli-grams per litre in terms of equivalent
[A]
Calcium Carbonate
[B]
Magnesium Carbonate
[C]
Sodium Carbonate
[D]
Calcium Hydroxide
Answer: Calcium Carbonate
95
Residual chlorine in water is determined by
[A]
Starch Iodide Method
[B]
Orthotolidine Method
[C]
Both (A) And (B)
[D]
None Of The Above
96
If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to
[A]
Total Alkalinity
[B]
Total Hardness
[C]
Total Hardness - Total Alkalinity
[D]
Non Carbonate Hardness
97
The velocity of flow of water in a sedimentation tank is about
[A]
5 to 10 cm/sec
[B]
15 to 30 cm/sec
[C]
15 to 30 cm/minute
[D]
15 to 30 cm/hour
Answer: 15 to 30 cm/minute
98
The overflow rate for plain sedimentation tanks is about
[A]
500 to 750 litres/hour/ m2
[B]
1000 to 1250 litres/hour/ m2
[C]
1250 to 1500 litres/hour/m2
[D]
1500 to 2000 litres/hour/m2
Answer: 500 to 750 litres/hour/ m2
99
Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about
[A]
10 to 25
[B]
50
[C]
75
[D]
100
100
The settling velocity of a particle in a sedimentation tank depends on
[A]
Depth Of Tank
[B]
Surface Area Of Tank
[C]
Both Depth And Surface Area Of Tank
[D]
None Of The Above
Answer: Surface Area Of Tank
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