NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage or Flood Control Systems Contractor Examination Exam - NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage or Flood Control Systems Contractor Examination Exam

Question 1

In U.S. customary units, the Rational Method peak-runoff equation used in ASCE urban stormwater design is Q = CiA. What do C, i, and A represent?

C = runoff coefficient, i = rainfall intensity in inches per hour, A = drainage area in acres C = conveyance factor, i = infiltration rate in inches per hour, A = wetted area in square feet C = channel coefficient, i = rainfall depth in inches, A = drainage area in square miles C = storage coefficient, i = time of concentration in minutes, A = impervious area in acres

Correct Answer:

C = runoff coefficient, i = rainfall intensity in inches per hour, A = drainage area in acres

Question 2

A 4.0-acre paved industrial pad has a runoff coefficient of 0.90. For a design intensity of 3.5 inches per hour, what is the Rational Method peak discharge?

5.6 cfs 8.8 cfs 12.6 cfs 14.0 cfs

Correct Answer:

12.6 cfs

Question 3

On a flood-control project, what is the primary functional difference between a detention basin and a retention basin?

A detention basin temporarily stores runoff and releases it at a controlled rate; a retention basin holds a permanent pool or has no designed surface outlet A detention basin is always lined with concrete; a retention basin is always earthen A detention basin treats only water quality; a retention basin is used only for 100-year peak shaving A detention basin must be underground; a retention basin must be an open pond

Correct Answer:

A detention basin temporarily stores runoff and releases it at a controlled rate; a retention basin holds a permanent pool or has no designed surface outlet

Question 4

Time of concentration for a Rational Method design is best defined as the time required for:

The design storm to deliver its total rainfall depth at the rain gauge A detention pond to drain from the 100-year water surface to the permanent pool Runoff to travel from the hydraulically most distant point of the catchment to the design point A storm sewer to flow full from the first inlet to the outfall after the rain stops

Correct Answer:

Runoff to travel from the hydraulically most distant point of the catchment to the design point

Question 5

All else equal, which land-cover change most increases the Rational Method runoff coefficient C?

Replacing native desert range with a concrete-lined drainage channel and rooftops Replacing a paved parking lot with irrigated turf Replacing a warehouse roof with an open-graded gravel lot Replacing a storm sewer with an equivalent grass-lined swale

Correct Answer:

Replacing native desert range with a concrete-lined drainage channel and rooftops

Question 1 of 100

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Prepare with the NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage or Flood Control Systems Contractor Examination Exam practice quiz. This question bank includes 100 questions covering excavation, osha, mexico, trench, and construction. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage or Flood Control Systems Contractor Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on excavation, osha, mexico, trench, and construction. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage or Flood Control Systems Contractor Examination Exam

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