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CG Vyapam_CE Environmental Quiz-5

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Question 1

The best method of disposal of refuse to ensure complete destruction of pathogenic bacteria is by

Question 2

Maximum discharge through a circular channel takes place when depth of flow is equal to

Question 3

A river has the dissolved oxygen of 2 mg/l, in this river

Question 4

The stages of zone of pollution in the river stream from upstream to downstream are

Question 5

Lake water contains phosphate ions. Which specieS would be formed if ferric ions, in the form of ferric chloride, are added in lake water?

Question 6

If slope and velocity of a sewer A is 1/P and 7 m/sec. If slope and velocity of a sewer B is 1/700 and 9 m/sec, then value of P will be (Material and size of both sewer is same)

Question 7

The minimum size of RCC manhole cover in a sewer system is

Question 8

Choose the correct option regarding sewer ventilation

i. sewer ventilation avoids building of sewer gases.

ii. to ensure sewer ventilation sometimes exhaust fans are used.

iii. sewer ventilation provides oxidation facility to sewage.

iv. Sewage ventilation ensures continuous flow of sewage.

Question 9

In order to haul the domestic and storm water, the type of sewer used are

Question 10

The spacing of manholes along a straight portion of a sewer is 300 m. The diameter of sewer may be

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AE & JE Exams

Jun 2AE & JE Exams