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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?

Ra-226
Sr-90
I-131
Au-198

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Environmental Engineering in CE
Average human body contains about __________ percent water by weight.

20
70
40
85

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Environmental Engineering in CE
Inhalation of silica dust causes a disease called

Bronchitis
None of these
Silicosis
Pneumoconiosis

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Environmental Engineering in CE
Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.

100-200
10-100
100-1000

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

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

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Environmental Engineering in CE
Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by

Both A & B
Neither A nor B
Natural aeration of water stream
Photosynthetic action of algae

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