Civil Engineering
Civil Engineering MCQs with Answers and Explanations
Civil engineering MCQs with answers and detailed explanations for PEC, NTS, WAPDA, PPSC and engineering job tests. Free subject-wise online practice. Take a scored quiz instead →
In PERT network analysis, the probability distribution of event completion time is assumed to follow:
ABeta distribution
BPoisson distribution
CExponential distribution
DNormal distribution
Initial setting time of ordinary Portland cement (OPC) should not be less than:
A10 minutes
B60 minutes
C30 minutes
D600 minutes
Self-cleansing velocity in a sanitary sewer pipe is maintained to prevent:
AProduction of toxic gases
BDeposition and settling of suspended solid matter
CBackflow into domestic connections
DExcessive scouring of pipe invert
The maximum permissible limit of fluoride in drinking water as per WHO guidelines is:
A3.0 mg/L
B0.5 mg/L
C1.5 mg/L
D5.0 mg/L
Biochemical Oxygen Demand (BOD5) test is standardly measured after incubation at:
A10 degrees Celsius for 5 days
B37 degrees Celsius for 3 days
C25 degrees Celsius for 7 days
D20 degrees Celsius for 5 days
The main objective of adding alum during water treatment process is to act as a:
AFilter aid to increase pH
BDisinfectant to kill pathogenic bacteria
CSoftener to remove permanent hardness
DCoagulant to precipitate colloidal impurities
California Bearing Ratio (CBR) test is performed to determine the strength and thickness design of:
ARetaining wall masonry
BRigid pavements
CConcrete bridge decks
DFlexible pavements
The aggregate impact value test is conducted to evaluate which property of road aggregates?
AStrength against crushing
BHardness against abrasion
CDurability against weathering
DToughness against sudden shock
Laminar flow through a circular pipe occurs when the Reynolds number is less than:
A4000
B10000
C2000
D500