Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name ' Assistant Engineer (Civil)/ Head Draftsman etc in Irrigation/ LSGD/ KSHB/ KTDC etc Cat.No: 210/2019, 125/2020, 126/2020, 191/2020, 005/2021, 028/2021, 128/2021, 134/2021, 206/2021' And exam conducted in the year 21. And Question paper code was '102/21'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
102/21
73. In Slow Sand Filters the effective size of filter sand ranges between
A) 4 to 4.75 mm B) 2to4mm
C) 0.2 to 0.4 mm D) 0.05 to 0.1 mm
74. The equalization tanks are provided
A) To balance the head loss
B) For removing bigger suspended matter in sewage
C) To balance fluctuating flows or concentrations
D) None of the above
75. Which of the following is not a method for disinfection ?
A) Boiling
B) Ozone treatment
Chlorination
೧
)
)
D) Flocculation
76. Population equivalent is a measure of
A) Population growth
B) Purity of water
C) Strength of sewage
D) None of the above
77. Aquatic life in a stream begin to be reduced as dissolved oxygen drops below
A) 0.4 mg/l 8) 4 mg/I
൭) 10 mg/l 0) 12 110/1
78. Capacity of a primary settling tank to treat a sewage of 12 million litres per day, by
assuming a detention period of 2 hours is
A) 200 تس 8) 100 m8
0) 2000 3م 0) 1000 3
79. In an Imhoff tank, the incoming sewage is
A) Allowed to mix with settled sludge
B) Not allowed to mix with settled sludge
C) Allowed to mix with activated sludge
D) Not allowed to mix with activated sludge
A -12-