VIVA Questions - Environmental Engineering QUESTIONS AND ANSWERS pdf

81.    The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is
a)    reflux valve
b)    sluice valve
c)    air relief valve
d)    pressure relief valve
Ans:a

82.    Scour valves are provided
a)    at street corners to control the flow of water
b)    at every depression and dead ends to drain out the waste water that may collect there
c)    at the foot of rising main along the slope to prevent back running of water
d)    at every summit of rising mains
Ans:b

83.    A sewer that receives the discharge of a number of house sewers is called
a)    house sewer
b)    lateral sewer
c)    intercepting sewer
d)    submain sewer
Ans:b

84.    A pipe conveying sewage from plumbing system of a single building to common sewer or point of immediate disposal is called
a)    house sewer
b)    lateral sewer
c)    main sewer
d)    submain sewer
Ans:a

85.    For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be
a)    separate system
b)    combined system
c)    partially combined system
d)    partially separate system
Ans:a

86.    Average rate of water consumption perhead per day as per Indian Standard is
a)    100 litres
b)    135 litres
c)    165 litres
d)    200 litres
Ans:b

87.    Sewerage system is usually designed for
a)    10 years
b)    25 years
c)      50 years
d)      75 years
Ans:b

88.    Which of the following sewers is preferred for combined system of sewage ?
a)    circular sewer
b)    egg shaped sewer
c)    rectangular sewer
d)    none of the above
Ans:b

89.    The suitable system of sanitation for area of distributed rainfall throughout the year with less intensity is
a)    separate system
b)    combined system
c)    partially separate system
d)    partially combined system
Ans:b

90. The water carriage system of collection of waste product
a)    is cheaper in initial cost than dry conservancy system
b)    requires treatment before disposal
c)    creates hygenic problem
d)    all of the above
Ans:b
Read More Environmental Engineering Questions & Answers
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