Environmental Engineering Sheet 26
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1) Question.
Which of the following statements is/are true in relation to the term 'detention perior' in a settling tank?
1. It may be determined by introducing a dye in the inlet and timing its appearance at the outlet
2. Greater the detention period, greater the efficiency of removal of settleable matter.
3. It is the time taken for any unit of water to pass through the settling basin.
4. It is usually more than the flow through perior.
Select the correct answer using the codes given below.
Codes:
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2) Question.
The following steps are involved in making a spigot and socket joint of cast iron pipes used in water supply systems:
1. Tarred gasket or hemp yarn is wrapped around the spigot
2. The spigot end is centred into the socket end of the preceding pipe.
3. A jointing ring is placed around the barrel and against the face of the socket.
4. The gasket or hemp yarn is caulked slightly.
5. Molten pig lead is poured and then caulked.
The correct sequence of these steps is
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3) Question.
The velocity of flow does not depend on
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4) Question.
An egg shaped section of sewer
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5) Question.
Most suitable section of sewer in separate sewage system is
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6) Question.
The suitable system of sanitation for area of distributed rainfall throughout the year with less intensity is
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7) Question.
Which of the following sewers is preferred for combined system of sewage?
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8) Question.
For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be
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9) Question.
A pipe coveying sewage from plumbing system of a single building to common sewer or point of immediate disposal is called
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10) Question.
A sewer that recieves the discharge of a number of house sewers is called
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