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Environmental Engineering in CE

Environmental Engineering in CE
TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

0.1
25
100
1000

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Environmental Engineering in CE
TLV of aldrin in public water supply system is about __________ μg/litre.

1097
17
357
0.5

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Environmental Engineering in CE
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes

Anaemia
Blood poisoning
All of these
Nervous system disorder

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Environmental Engineering in CE
Presence of iron and manganese in water causes

Reduction in its dissolved oxygen content
Temporary hardness
Discoloration of bathroom fixtures
None of these

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Environmental Engineering in CE
Noise level inside a jet air liner in normal flight is about __________ decibels.

125
145
100
80

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Environmental Engineering in CE
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.

200
140
120
170

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