Soil Composition
To be done
1.6
SELF EVALUATION EXERCISE 1
1.6.1 The density of a sample of saturated soil is 1 890kg/m”, and the moisture content
is 24,3%. Determine the dry density, void ratio and density of the solid particles.
Also find the bulk density of the same soil if the void ratio remains the same, but
the degree of saturation is only 90%.

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk