Waste water Treatment MCQs PDF for test preparation. Civil Engineering MCQs for PPSC, FPSC, NTS, WAPDA, Pakistan Railways, MES, SPSC, KPPSC, and ETEA.
What is the primary source of wastewater ?
A. plastic waste
B. untreated sewage
C. agricultural runoff
D. All of themWhat is the main source of wastewater ?
A. residential and domestic sources
B. Mining
C. Radioactive waste
D. None of them_____ poisoning water in Japan is from fishes.
A. Antimony
B. Palladium
C. Arsenic
D. BismuthWater content of sewage is about ____.
A. 9.9 %
B. 99 %
C. 90 %
D. 95 %The detention period for plain sedimentation water tanks, is usually :
A. 24 to 36 hours
B. 4 to 8 hours
C. 8 to 16 hours
D. 16 to 24 hoursSkimming tanks are ____ :
A. Tanks provided with self-cleansing screens
B. Improved version of grit chambers
C. Used to remove the grease and oil
D. Those from which sludge is skimmed outThe factor responsible for purification of sewage in river is _____ ?
A. Temperature
B. Hydrology
C. Dissolved oxygen in water
D. All the aboveHume steel pipes are ____ ?
A. Steel shell coated from outside with cement mortar
B. Steel pipes
C. Steel shell coated from inside with cement mortar
D. Both a and cPick up the correct statement from the following
A. The larger the sewer in size, deposition will take place
B. The larger the sewer in size, no deposition will take place
C. The larger the sewer in size, more will be
D. The smaller the sewer in size, less will be velocityHydraulic mean radius is ____ ?
A. Mean of radii in a pipe line of varying cross-sections
B. Cross-sectional area/wetted perimeter
C. Mean radius of sewer
D. Difference in heads between two points in circular pipes