A. Methane gas
B. Hydrogen sulphide
C. Carbondioxide gas
D. Diesel vapours
A. Are water seals which prevent the entry of foul gases
B. Are used to trap the rats entering sewers
C. Dissolve the foul gases
D. Create symphonic action to increase the quick disposal of sewerage
A. 1 in 60
B. 1 in 100
C. 1 in 120
D. None of these
A. decreases linearly with elevation
B. remains constant
C. varies in the same way as the density
D. increases exponentially with elevation
E. unpredictable
A. Current asset
B. Trade investment asset
C. Fixed asset
D. Intangible asset
A. adhesion
B. cohesion
C. viscosity
D. compressibility
E. surface tension
A. First cost + interest of first cost
B. Annual cost – interest of first cost
C. First cost + cost of perpetual maintenance
D. First cost + salvage value