FlexiQuiz - WELL CONTRACTORS CERTIFICATION CONSTRUCTION STANDARDS QUIZ1

What are two differences in drilling into soft formation versus rock?

Pipe or casing must follow the drill bit closely

Casing has to be driven

The drilling effect of the bit is a loosening/mixing action

All of the above

What two types of sand are recommended to be used for backfilling a hole to prevent slurry from penetrating more than 2-3 inches?

Plaster sand

Mortar sand

Play sand

Both A & B

When might spacing between wells in well point system be less than 25ft

Large boulders in soil

Fine sand formations

Excess tree roots

None of the above

In order to assure that grout will provide a complete seal it should be placed________

Filled at various times when convenient

Filled with all types of grout

One continuous operation

None of the above

When a well is used for dewatering, what is the required time frame the well must be permanently abandoned once dewatering has finished

5 days or less

10 days or less

30 days or less

60 days or less