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Environmental Engineering in CE

Environmental Engineering in CE
Dose of chlorine for disinfection of water is about __________ mg/litre of water.

0.1
1
0.01
0.3

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Environmental Engineering in CE
Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.

80
120
50
25

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Environmental Engineering in CE
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?

NOx
F
SO₂
Hg

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Environmental Engineering in CE
Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million).

2000
5000
1000
50

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Environmental Engineering in CE
Thermal pollution due to excessive heat & temperature in the working place causes

All of these
Fatigue
High breathing rate
Reduction in working efficiency of manpower

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Environmental Engineering in CE
TLV of mercury in potable (drinking) water is about __________ ppm.

1
0.1
0.001
5

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