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ARE 5.0 - PPD Questions with Correct
Answers | Updated (100% Correct Answers)
SITE DESIGN: BLDG LOCATION/IMPROVEMENTS Answer: ALL BLDGS
DISRUPT DRAINAGE. ACCOMMADATE INCREASED RUNOFF.
POSITIVE DRAINAGE AWAY FROM BLDGS.
SITE DESIGN: DRAINAGE TYPES Answer: ABOVE GROUND OR
BELOW GROUND. ABOVE: PERVIOUS PAVING, SHEET FLOW,
GUTTERS, SWALES, CHANNELS, AND RUNOFFS. BELOW:
PERFORATED DRAINS, ENCLOSED STORM SEWERS TO CITY LINES
OR TO NATURAL FEATURE
SITE DESIGN: PAVING Answer: MINIMUM SITE PAVING TO BE 1.5%
ABOVE GROUND. BELOW GROUND 0.3%
SITE DESIGN: UNDERGROUND ITEMS Answer: STORM DRAINS
COLLECT WATER FROM ROOF DOWNSPOUTS, DRAIN INLETS,
CATCH BASINS, AND DRAIN TILES. DRAIN INLET: OPENING IN
GROUND COVERED W/ METAL GRATE. CATCH BASIN:
UNDERGROUND RESERVOIR THAT HAS A SUMP BUILT INTO IT,
DEBRIS SETTLES SO IT DOESN'T CLOG PIPING. LARGE STORM
SEWER SYSTEMS MUST HAVE MANHOLES. STORM SEPARATE FROM
SANITARY
© 2025 All rights reserved
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SITE DESIGN: DRAINAGE SYSTEM REQUIREMENTS Answer: BASED
ON SIZE OF AREA TO BE DRAINED, RUNOFF COEFFICIENT, AND
AMOUNT OF WATER TO BE DRAINED DURING MOST SEVERE
STORM. COMMON TO USE 25 YEAR STORM. IF RUNOFF EXCEEDS
UTILITIES A HOLDING POND MAY BE BUILT, COLLECTS WATER TO
RELEASE AT CONTROLLED RATE.
UTILITIES Answer: CAN INCLUDE: SANITARY, STORM, WATER, GAS,
ELECTRICITY, STEAM, TELEPHONE, INTERNET, CABLE.
SANITARY/STORM TAKE PRECEDENCE B/C THEY NEED GRAVITY TO
FLOW. MORE FLEXIBILITY IN ROUTING AND LOCATION WHERE
GRAVITY DOESN'T MATTER.
UTILITIES: SEWERS Answer: MIN SLOPE IS 0.5% TO 2.0%
DEPENDING ON PIPE SIZE. GREATER SLOPE FOR SMALLER PIPES.
VEHICLES: CIRCULATION Answer: ROADS SHOULD BE WIDE
ENOUGH FOR TWO VEHICLES TO PASS MIN. CURVES GRADUAL
AND FOLLOW TOPO SO NO BLIND CURVES. PROVIDE DRIECT
ACCESS TO PARKING AND BLDG W/O EXCESSIVE DRIVES,
TURNAROUNDS, DEAD ENDS, OR CONFLICTS.
VEHICLES: DESIGN Answer: ROAD SHOULD NOT BE
PERPENDICULAR TO SLOPE UNLESS SLOPE IS GENTLE. SHOULD
SLIGHTLY CROSS THE SLOPE TO MINIMIZE GRADE. MAX SLOPE FOR
ROAD 15.0% 10% OR LESS IS PREFERABLE.
© 2025 All rights reserved
ARE 5.0 - PPD Questions with Correct
Answers | Updated (100% Correct Answers)
SITE DESIGN: BLDG LOCATION/IMPROVEMENTS Answer: ALL BLDGS
DISRUPT DRAINAGE. ACCOMMADATE INCREASED RUNOFF.
POSITIVE DRAINAGE AWAY FROM BLDGS.
SITE DESIGN: DRAINAGE TYPES Answer: ABOVE GROUND OR
BELOW GROUND. ABOVE: PERVIOUS PAVING, SHEET FLOW,
GUTTERS, SWALES, CHANNELS, AND RUNOFFS. BELOW:
PERFORATED DRAINS, ENCLOSED STORM SEWERS TO CITY LINES
OR TO NATURAL FEATURE
SITE DESIGN: PAVING Answer: MINIMUM SITE PAVING TO BE 1.5%
ABOVE GROUND. BELOW GROUND 0.3%
SITE DESIGN: UNDERGROUND ITEMS Answer: STORM DRAINS
COLLECT WATER FROM ROOF DOWNSPOUTS, DRAIN INLETS,
CATCH BASINS, AND DRAIN TILES. DRAIN INLET: OPENING IN
GROUND COVERED W/ METAL GRATE. CATCH BASIN:
UNDERGROUND RESERVOIR THAT HAS A SUMP BUILT INTO IT,
DEBRIS SETTLES SO IT DOESN'T CLOG PIPING. LARGE STORM
SEWER SYSTEMS MUST HAVE MANHOLES. STORM SEPARATE FROM
SANITARY
© 2025 All rights reserved
, 2
SITE DESIGN: DRAINAGE SYSTEM REQUIREMENTS Answer: BASED
ON SIZE OF AREA TO BE DRAINED, RUNOFF COEFFICIENT, AND
AMOUNT OF WATER TO BE DRAINED DURING MOST SEVERE
STORM. COMMON TO USE 25 YEAR STORM. IF RUNOFF EXCEEDS
UTILITIES A HOLDING POND MAY BE BUILT, COLLECTS WATER TO
RELEASE AT CONTROLLED RATE.
UTILITIES Answer: CAN INCLUDE: SANITARY, STORM, WATER, GAS,
ELECTRICITY, STEAM, TELEPHONE, INTERNET, CABLE.
SANITARY/STORM TAKE PRECEDENCE B/C THEY NEED GRAVITY TO
FLOW. MORE FLEXIBILITY IN ROUTING AND LOCATION WHERE
GRAVITY DOESN'T MATTER.
UTILITIES: SEWERS Answer: MIN SLOPE IS 0.5% TO 2.0%
DEPENDING ON PIPE SIZE. GREATER SLOPE FOR SMALLER PIPES.
VEHICLES: CIRCULATION Answer: ROADS SHOULD BE WIDE
ENOUGH FOR TWO VEHICLES TO PASS MIN. CURVES GRADUAL
AND FOLLOW TOPO SO NO BLIND CURVES. PROVIDE DRIECT
ACCESS TO PARKING AND BLDG W/O EXCESSIVE DRIVES,
TURNAROUNDS, DEAD ENDS, OR CONFLICTS.
VEHICLES: DESIGN Answer: ROAD SHOULD NOT BE
PERPENDICULAR TO SLOPE UNLESS SLOPE IS GENTLE. SHOULD
SLIGHTLY CROSS THE SLOPE TO MINIMIZE GRADE. MAX SLOPE FOR
ROAD 15.0% 10% OR LESS IS PREFERABLE.
© 2025 All rights reserved
