ABC Field Test and Inspection Procedures 4

Question 1

When conducting a sanitary survey, which item represents a significant deficiency requiring immediate corrective action?

Accepted Answer

An uncovered finished water reservoir

Answer

Faded exterior paint on a pump house

Answer

Minor landscaping encroachment on a well lot

Answer

Outdated but functional process charts

Question 2

What is the correct procedure when a field pH meter reading drifts more than 0.2 units during a calibration check?

Accepted Answer

Recalibrate the meter using fresh buffer solutions

Answer

Accept the drift as within field tolerance

Answer

Report the sample result with a qualifier flag and submit

Answer

Replace the electrode immediately

Question 3

A sewer main inspection reveals root intrusion at multiple joints. The BEST long-term corrective measure is:

Accepted Answer

Cured-in-place pipe (CIPP) lining or joint replacement

Answer

Chemical root treatment only

Answer

High-pressure water jetting annually

Answer

Increasing flow velocity to scour roots

Question 4

During a pump station inspection, the inspector records a 10-minute pump runtime per cycle and a 5-minute off time. What is the pump duty cycle?

Accepted Answer

67%

Answer

33%

Answer

50%

Answer

200%

Question 5

What does a negative pressure reading on the suction side of a centrifugal pump indicate?

Accepted Answer

The pump is drawing water from a source below the impeller (suction lift)

Answer

The pump is operating in shut-off condition

Answer

Discharge pressure is too high

Answer

The pump is running backwards

Question 6

Under 40 CFR Part 141, what is the minimum free chlorine residual required in a public water system distribution system?

Accepted Answer

0.1 mg/L detectable

Answer

0.2 mg/L at every sample point

Answer

0.5 mg/L at the entry point only

Answer

1.0 mg/L at the far ends of the system

Question 7

What is the purpose of a jar test performed during a water treatment plant inspection?

Accepted Answer

Simulating coagulation and flocculation to optimize chemical dosing

Answer

Measuring filter run time

Answer

Determining chlorine contact time (CT)

Answer

Calibrating turbidimeters