Civil Engineering MCQs

Page No. 21

Pick up the correct statement from the following?


a Anaerobic bacteria flourish in the absence of oxygen


bAerobic bacteria flourish in the presence of oxygen


c Facultative bacteria flourish with or without oxygen


dAll the above


View Answer All the above

Pick up the correct statement from the following?


aThe circular section of sewers provides maximum hydraulic mean depth


bThe circular sewers are provided for separate sewerage system


cThe circular sewers work efficiently if the sections run at least half full


d All the above


View Answer All the above

Pick up the correct statement from the following?


a Inlets are provided on the road surface at the lowest point for draining rain water


b Inlets are generally provided at an interval of 30 m to 60 m along straight roads


c Inlets having horizontal openings, are called horizontal inlets


d All the above


View Answer All the above

Pick up the correct statement from the following?


aIndore method of composting involves decomposition under aerobic conditions


bBangalore method of composting involves decomposing under anaerobic conditions


cFully stabilised refuse by the Bangalore method of compositing is a powdery mass called humus


d all of these


View Answer all of these

Pick up the correct statement from the following?


a pH value indicates acidity and alkalinity of sewage


b In acidic sewage, the pH value is less than 7


cIn alkaline sewage, the pH value is more than 7


d All the above


View Answer All the above

Pick up the correct statement from the following?


aThe boning rod is used for checking the levels of the sewer inverts


bManhole covers are made circular for the convenience of the cleaning st


cA manhole is classified as shallow manhole if its depth is less than 0.9 m


d All the above


View Answer All the above

Pick up the correct statement from the following ?


aTurbidity is more in strong sewage


bThe black colour indicates septic sewage


cThe sewage omits offensive odours after four hours


d All the above


View Answer All the above

The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called_______________?


aA heap


bPlateau


cWindrow


d None of these


View Answer None of these

The gas which may cause explosion in sewers, is_________________?


aCarbondioxide


bMethane


cAmmonia


dCarbon monoxide


View Answer Methane

The discharge per unit plan area of a sedimentation tank, is generally called________________?


aOver flow rate


bSurface loading


cOver flow velocity


dAll the above


View Answer All the above

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