The most suitable test for measuring the permeability of clayey soils in the laboratory is ___________

From a flow-net diagram drawn under a concrete dam, following information are obtained:

(i) The head difference between upstream and downstream side of the dam is 9 m .

(ii) The total number of equipotential drops between upstream and downstream side of the dam is 10 .

(iii) The length of the field nearest to the toe of the dam in the downstream side is 1 m .

If the soil below the dam is having a saturated unit weight of $21 \mathrm{kN} / \mathrm{m}^3$ and unit weight of water is $9.81 \mathrm{kN} / \mathrm{m}^3$, then the factor of safety against the quick condition will be __________ (round off to two decimal places).

A 6 m thick clay stratum has drainage at both its top and bottom surface due to the presence of sand strata. The time to complete $50 \%$ consolidation is 2 years. The coefficient of volume change $\left(m_v\right)$ is $1.51 \times 10.3 \mathrm{~m}^2 / \mathrm{kN}$ and unit weight of water is $9.81 \mathrm{kN} / \mathrm{m}^3$.

The coefficient of permeability (in m/year) is__________ (round off to three decimal places).