NGWA CWD Practice Questions - NGWA Certified Well Driller Exam

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A Marsh funnel viscosity reading of 38 seconds for a quart of mud is measured. The base freshwater standard is 26 seconds. This reading indicates the mud is:

Thinner than water At the acceptable minimum for water-well drilling More viscous than water, indicating bentonite or polymer is building viscosity Too thin to transport cuttings and requires immediate thinning

Correct Answer:

More viscous than water, indicating bentonite or polymer is building viscosity

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