If water begins to accumulate in a trench where you are at work, you should _____.
a. inform your supervisor
b. locate the source of the water
c. immediately get out of the trench
d. send for pumping equipment
Question 2
To control water seepage in excavations that have a high water table, the commonly used retention material
is _____.
a. timber piers
b. steel-sheet piling
c. precast concrete slabs
d. plywood panels