ICC- Flood Openings, Enclosures & Floodplain Management

Question 1

Permanent flood openings in enclosures below the DFE shall have the bottom of the opening no higher than:

A) 6 in. above grade.

B) 12 in. above grade.

C) 18 in. above grade.

D) 24 in. above grade.

Explanation: IRC and ASCE 24 require the bottom of flood openings to be no more than 12 in. above adjacent grade.

Question 2

The flood-opening shape that provides the highest coefficient of discharge (Cd) is:

A) round, unobstructed.

B) square, unobstructed.

C) rectangular with long axis vertical.

D) rectangular with long axis horizontal.

Explanation: Round openings minimize turbulence and friction losses, yielding the highest Cd value.

Question 3

Enclosed areas below the DFE shall not be used for:

A) parking.

B) storage.

C) sleeping areas.

D) building access.

Explanation: Living or sleeping spaces below the DFE are prohibited because of life-safety risk.

Question 4

New buildings in flood hazard areas must use flood-damage-resistant materials:

A) above grade only.

B) for the entire building.

C) below the Design Flood Elevation.

D) above the Design Flood Elevation.

Explanation: Materials that can withstand prolonged inundation are required only in the portions expected to be flooded.

Question 5

“Substantial improvement” is defined as any reconstruction, rehabilitation, addition, or other improvement whose cost equals or exceeds:

A) 25 percent of the pre-improvement market value.

B) 50 percent of the pre-improvement market value.

C) 75 percent of the pre-improvement market value.

D) 100 percent of the pre-improvement market value.

Explanation: Both FEMA regulations and ASCE 24 use the 50-percent threshold.

Question 6

When a lateral addition constitutes a substantial improvement in a V-Zone, which of the following must comply with current flood-resistant requirements?

A) Only the addition.

B) Both the addition and the existing building.

C) Only the existing building.

D) Neither, if the addition cost is less than the market value.

Explanation: Substantial improvement triggers compliance for the entire structure as if it were new construction.

Question 7

In a floodway, site grading or filling may be approved only when:

A) the grade change is less than 6 in.

B) no ponding occurs under the building.

C) hydrologic and hydraulic analyses demonstrate no increase in flood levels during the design flood.

D) the increase in flood levels is limited to 1 ft.

Explanation: A “no-rise” certification is required before any encroachment in a regulatory floodway is permitted.

Question 8

FEMA’s Elevation Certificate may be based on:

A) architectural sketches only.

B) estimated elevations from formwork.

C) photographs with red-line marks.

D) construction drawings, a building under construction, or finished construction.

Explanation: Official elevation data must be obtained from reliable surveyed sources at the appropriate stage.

Question 9

Electrical panels in coastal flood hazard areas must be located:

A) with no special requirements.

B) above the Design Flood Elevation.

C) a minimum of 5 ft above adjacent grade.

D) a minimum of 3 ft above the DFE.

Explanation: The Coastal Construction Manual and ASCE 24 require electrical service equipment to be elevated above the DFE.

Question 10

Costs that must be included when calculating substantial damage or substantial improvement include:

A) debris clean-up.

B) interior finishes.

C) landscaping and irrigation.

D) design fees, surveys, and permits.

Explanation: Interior finishes are part of the building and must be counted.

Question 11

The Design Flood Elevation (DFE) represents:

A) the average high-tide level.

B) the predicted level of floodwaters during a significant event.

C) the elevation of the lowest adjacent grade.

D) the height of the nearest dune crest.

Explanation: DFE is the elevation used for design and includes freeboard above the Base Flood Elevation where required.

Question 12

Engineered openings in enclosures below the DFE use specific flood opening coefficients of discharge (Cd). The opening with the highest Cd is:

A) round, unobstructed.

B) square, unobstructed.

C) rectangular with long axis vertical, unobstructed.

D) rectangular with long axis horizontal, unobstructed.

Explanation: Streamlined shape of round openings minimizes turbulence and maximizes flow efficiency.

Question 13

Which of the following houses complies with floodplain management regulations where the bottom is below the base flood level in a coastal high hazard area?

A) On piles.

B) Dry floodproofed.

C) Dry floodproofed at or above the design flood elevation.

D) On piles with lowest horizontal structural member at or above the design flood elevation.

Explanation: Elevation of the lowest horizontal member at or above DFE is required in V-zones.

Question 14

According to ASCE 24, Flood Resistant Design and Construction, attached decks in a Coastal High Hazard Area shall have support embedment:

A) 2 ft below eroded grade.

B) 5 ft below eroded grade.

C) 10 ft below mean sea level.

D) equivalent to that of the main structure.

Explanation: Consistency in foundation performance prevents the deck from becoming a separate hazard.

Question 15

A deck constructed in a V-zone and attached to a building must:

A) be of breakaway construction.

B) not exceed 100 sq ft.

C) meet a minimum uniform live load of 30 psf.

D) be elevated to or above the bottom of the building’s lowest horizontal member.

Explanation: Matching the elevation of the main structure’s lowest horizontal member is required.

Question 16

According to the IRC, foundations for manufactured housing used as a dwelling must:

A) comply with weathering requirements of IRC R304.5.

B) connect ground anchors to the outrigger beam only.

C) consist of vertical and diagonal ties as required to resist wind forces.

D) connect ground anchors to the main structural frame of the building and outrigger beams.

Explanation: Comprehensive anchoring to both main frame and outriggers is required for wind resistance.

Question 17

In accordance with the IRC, a one-story 10 ft × 15 ft detached permanent storage shed located in an area with a wind speed of 110 mph is exempt from:

A) a foundation.

B) a building permit.

C) braced wall panels.

D) foundation anchorage.

Explanation: Smaller, lower-risk structures are often exempt from full permitting requirements.

Question 18

Given a lateral addition constituting a substantial improvement in a flood hazard area subject to high velocity wave action where community requirements have changed, which must meet the latest requirements?

A) The addition only.

B) Both the addition and the existing building.

C) The addition using requirements in effect at the time of original construction.

D) Neither if the addition cost is less than the pre-addition market value.

Explanation: Substantial improvement classifies the entire structure as new construction for regulatory purposes.

Question 19

Seawalls are primarily designed to:

A) prevent flooding.

B) allow wetlands to be converted to usable land.

C) prevent erosion and damage caused by wave action.

D) prevent flood debris impact loads from affecting structures.

Explanation: Their main engineering purpose is to protect against the physical impact of waves and resulting erosion.

Question 20

According to the IRC, site grading and filling in a floodway must:

A) be approved if the grade is not raised or lowered more than 6 in.

B) be approved as long as the work does not result in standing water or ponding.

C) not be approved unless demonstrated through hydrologic and hydraulic analysis that the work will not result in any increase in flood levels during the design flood.

D) not be approved unless the increase is limited to 1 ft.

Explanation: A no-rise analysis is mandatory for any proposed work in a floodway.

Question 21

According to the Home Builder’s Guide to Coastal Construction, most water-intrusion problems are related to:

A) structural sheathing that is not protected against moisture.

B) moisture barrier systems that require only a single drainage plane.

C) moisture barrier systems that eliminate water vapor transmission.

D) lapping of materials and flashing around doors, windows, and penetrations.

Explanation: Detailing failures at openings and material transitions are the most frequent causes of water intrusion.

Question 22

New buildings in flood hazard areas are required to have flood damage-resistant materials:

A) above grade.

B) for the entire building.

C) below the design flood elevation.

D) above the design flood elevation.

Explanation: Only the portions of the building that can be inundated need flood-damage-resistant materials.

Question 23

What requirements does the Coastal Construction Manual put upon electrical panel installations?

A) They do not meet any special requirements.

B) They must be above the design flood elevation.

C) They must be 5 ft above adjacent grade elevation.

D) They must be a minimum of 3 ft above the design flood elevation.

Explanation: Elevation above the DFE protects the electrical system from flood damage and electrocution hazards.

Question 24

According to the Home Builder’s Guide, breakaway walls in V-zones must be designed for the following loads acting perpendicular to the plane of the wall:

A) flood loads only.

B) 10 to 20 lb per sq ft.

C) the lesser of the wind load or the flood load.

D) the greater of the wind load, earthquake load, or 10 lb per sq ft.

Explanation: The walls must withstand normal environmental loads but fail under design flood forces.

Question 25

According to ASCE 24, “substantial improvement” is defined as reconstruction, rehabilitation, addition, or other improvements performed for a cost of at least:

A) 25 percent of its pre-improved market value.

B) 50 percent of its pre-improved market value.

C) 75 percent of its pre-improved market value.

D) 100 percent of its pre-improved market value.

Explanation: The 50-percent threshold is the regulatory trigger for bringing the structure into compliance.

Question 26

Which of the following costs must be included in substantial damage and substantial improvement calculations?

A) debris clean up.

B) interior finishes.

C) landscaping and irrigation.

D) design, surveys, and permits.

Explanation: Interior finishes are building components and must be included in the cost calculation.

Question 27

Given a lateral addition constituting a substantial improvement in a flood-hazard area subject to high velocity wave action, which community requirements must the addition and existing building meet?

A) The addition only must comply with the latest requirements.

B) Both the addition and the existing building must comply with the latest requirements for new construction.

C) The addition must comply with requirements in effect when the existing building was constructed.

D) Neither must comply if the addition cost is less than the pre-addition market value.

Explanation: Substantial improvement requires the whole building to meet current flood-resistant standards.

Question 28

According to the International Building Code, restoration of a substantially damaged building:

A) requires an emergency permit.

B) requires a variance from the board of appeals.

C) requires a special inspection of all components and cladding below the flood elevation.

D) requires the building to be designed and constructed to resist the effects of flood hazards and flood loads.

Explanation: Rebuilding after substantial damage is an opportunity and a requirement to improve flood resistance.

Question 29

In a flood hazard area, all of the following are considered new construction, except:

A) a substantially improved building.

B) an existing building moved to another site.

C) replacement of a partially demolished building.

D) repairs to a less than substantially damaged building.

Explanation: Minor repairs do not trigger the full new-construction compliance path.

Question 30

If an addition is added to a substantially damaged building at the same time repairs are made:

A) only the addition must be elevated to the current BFE.

B) only the repaired building must be elevated to the current BFE.

C) both the addition and the repaired building must be elevated to the current BFE.

D) both must be elevated to the BFE in effect when the building was originally constructed.

Explanation: The entire structure becomes subject to current elevation requirements.

Question 31

In all coastal flood hazard areas, shallow foundations for buildings:

A) need not be designed and constructed to withstand wave action.

B) must prevent flotation, collapse, and permanent lateral movement of the building during the base flood.

C) require a design in accordance with accepted engineering practice only if they support more than 4% of unbalanced lateral load.

D) must be designed with flood vents to equalize hydrostatic pressures under base flood conditions.

Explanation: The foundation’s primary role is to keep the building stable under design flood conditions.

Question 32

According to the Home Builder’s Guide, when the existing grade exceeds the BFE in a V-zone, slab foundations for buildings:

A) are prohibited.

B) are permitted in lieu of pile foundations.

C) must be reinforced to prevent damage in undermined areas.

D) must be designed and constructed with edges turned down below the BFE.

Explanation: Shallow foundations are not permitted in V-zones regardless of existing grade.

Question 33

Bracing of pile foundations in V-zones:

A) is required.

B) is prohibited.

C) is determined by the foundation engineer.

D) is permitted only as a temporary measure during construction.

Explanation: Bracing can collect debris and increase wave forces; open foundations are required.

Question 34

FEMA’s Elevation Certificate can be completed based on:

A) architectural sketches or permit drawings.

B) estimated finished floor elevation based on top of formwork.

C) photographs of the finished building with survey red lines on photo.

D) construction drawings, building under construction, or finished construction.

Explanation: Reliable surveyed data at appropriate construction stages is required.

Question 35

According to the IRC, a registered design professional shall certify which of the following in coastal flood hazard areas?

A) The main roof elevation.

B) The depth of pile embedment.

C) The as-built elevation of the lowest floor.

D) The fastener spacing for structural wall panels protecting openings.

Explanation: Certification of pile embedment verifies the foundation can resist design forces.

Question 36

When an accessory building is constructed below the DFE, the Home Builder’s Guide recommends that:

A) it should be a maximum of 200 sq ft.

B) it should be anchored to resist being blown away.

C) where possible, it should be attached to the primary building.

D) it should be oriented with the long dimension perpendicular to the expected flow of water.

Explanation: Size limitation reduces potential loss and flood-flow obstruction.

Question 37

Sections of the coastal area not eligible to obtain flood insurance through FEMA are found on the FIRM maps and designated as:

A) V-zones.

B) flood-hazard areas.

C) coastal barrier zones.

D) coastal high-hazard areas.

Explanation: Coastal Barrier Resources System units are ineligible for most federal assistance including NFIP insurance.

Question 38

According to the Home Builders Guide to Coastal Construction, which of the following is true?

A) Buildings should be set back from areas vulnerable to both long-term and storm erosion.

B) Siting a building at the 30-year coastal setback line means the building is safe for the next 30 years.

C) Siting a new building within the footprint of a pre-existing building means the new building will be safe from erosion.

D) The single most common siting mistake is the failure to preserve dune vegetation on a site.

Explanation: Proper setback from erosion-prone areas is the most effective protective strategy.

Question 39

Given an inspector finds construction has encroached into a wetland area, the first action the inspector should take is:

A) Issue a stop-work order and revoke the permit.

B) Have the code enforcement officer issue a stop-work order.

C) Issue a stop-work order until plans are revised and updated.

D) Contact the contractor and set a meeting to resolve the situation.

Explanation: Halting work immediately prevents further environmental damage.

Question 40

Additional construction documents for constructions in areas prone to flooding shall include all of the following information except:

A) base elevation.

B) elevation of the proposed lowest floor.

C) the elevation of the basement floor above the adjacent grade.

D) elevation of the bottom of the lowest horizontal structural member.

Explanation: Basement floor elevation relative to grade is not a primary flood-document requirement.

Question 41

For construction in areas prone to flooding, the building official must require documentation of the elevation of the lowest floor prepared by a:

A) city building inspector.

B) registered home inspector.

C) certified floodplain manager.

D) registered design professional.

Explanation: A licensed design professional provides the required authoritative documentation.

Question 42

According to the IRC, when installing masonry veneer in wind areas of more than 30 psf, each tie shall support only a wall area of not more than:

A) 2.00 sq ft.

B) 2.67 sq ft.

C) 3.00 sq ft.

D) 3.33 sq ft.

Explanation: Higher wind pressures require more frequent attachment points (max 2.00 sq ft per tie).

Question 43

In coastal high-hazard areas, garages that are structurally connected to a structure shall not be permitted:

A) to share a roof with the main structure.

B) to have the lowest floor level below grade on any side.

C) to have the lowest floor level below grade on all sides.

D) to have the floor surface with a slope less than 4 percent to the door opening to facilitate drainage.

Explanation: Below-grade floors create prohibited basement conditions in V-zones.

Question 44

Seawalls are primarily designed to:

A) prevent flooding.

B) allow wetlands to be converted to usable land.

C) prevent erosion and damage caused by wave action.

D) prevent flood debris impact loads from affecting structures.

Explanation: They protect the shoreline from wave energy and resulting erosion.

Question 45

According to the International Building Code, site grading and filling in a floodway must:

A) be approved if the grade is not raised or lowered more than 6 in.

B) be approved as long as the work does not result in standing water or ponding beneath a building.

C) not be approved unless demonstrated through hydrologic and hydraulic analysis that the proposed work will not result in any increase in flood levels during the design flood.

D) not be approved unless the proposed work will not increase flood levels more than 1 ft.

Explanation: No-rise certification based on technical analysis is mandatory.

Question 46

Given sections of the coastal area are not eligible to obtain flood insurance through FEMA. Locations of these areas are found on the FIRM maps and are designated as:

A) V-zones.

B) flood hazard areas.

C) coastal barrier zones.

D) coastal high-hazard areas.

Explanation: Coastal Barrier Resources Act designations remove eligibility for NFIP coverage.

Question 47

According to the Home Builders Guide to Coastal Construction, which of the following is true?

A) Buildings should be set back from areas vulnerable to both long-term and storm erosion.

B) Siting a building at the 30-year coastal setback line means the building is safe for 30 years.

C) Siting a new building within the footprint of a pre-existing building means the new building will be safe from erosion.

D) The single most common siting mistake made by designers, builders, and owners is the failure to preserve dune vegetation on a site.

Explanation: Setback from both chronic and episodic erosion is essential.

Question 48

Given an inspector while doing a foundation inspection finds the construction has encroached into a wetland area. What is the first action the inspector should take?

A) Issue a stop-work order and revoke the permit.

B) Have the code enforcement officer issue a stop-work order.

C) Issue a stop-work order until plans are revised and updated.

D) Contact the contractor and set a meeting to resolve the problem.

Explanation: Stop-work order allows time for plan revision and environmental compliance.

Question 49

Additional construction documents for construction in areas prone to flooding shall include all of the following information except:

A) eave elevation.

B) elevation of the proposed lowest floor.

C) elevation of the basement floor above the adjacent grade.

D) elevation of the bottom of the lowest horizontal structural member.

Explanation: Eave elevation is not a primary flood-resistance metric required in the documentation.

Question 50

For construction in areas prone to flooding, the building official must require documentation of the elevation of the lowest floor prepared by a:

A) city building inspector.

B) registered home inspector.

C) certified floodplain manager.

D) registered design professional.

Explanation: Licensed professionals provide the legally required elevation certification.

Question 51

According to the IRC, when installing masonry veneer in wind areas of more than 30 psf, each tie shall support only a wall area of not more than:

A) 2.00 sq ft.

B) 2.67 sq ft.

C) 3.00 sq ft.

D) 3.33 sq ft.

Explanation: The code reduces the maximum tributary area per tie under high wind pressure.

Question 52

The enclosed areas below the DFE shall not be used for:

A) parking.

B) storage.

C) sleeping areas.

D) building access.

Explanation: Sleeping areas below DFE present unacceptable life-safety risk.

Question 53

Permanent flood openings shall have the bottom of the opening no more than how many inches above ground level?

A) 6.

B) 12.

C) 18.

D) 24.

Explanation: 12 inches is the maximum permitted height for the bottom of flood openings.

Question 54

The opening shape with the highest coefficient of discharge (Cd) for engineered flood openings is:

A) round, unobstructed.

B) square, unobstructed.

C) rectangular with long axis vertical, unobstructed.

D) rectangular with long axis horizontal, unobstructed.

Explanation: Round openings offer the most efficient flow characteristics.

Question 55

Which of the following is considered new construction in a flood hazard area?

A) Repairs to a less than substantially damaged building.

B) A substantially improved building.

C) Routine maintenance of an existing structure.

D) Replacement of interior finishes only.

Explanation: Substantial improvement classifies the work as new construction for regulatory purposes.

Question 56

The cost threshold for substantial improvement is at least what percent of the structure’s pre-improved market value?

A) 25.

B) 50.

C) 75.

D) 100.

Explanation: 50 percent is the standard regulatory threshold.

Question 57

Electrical panels must be installed:

A) at any convenient location.

B) above the Design Flood Elevation.

C) below the Design Flood Elevation if protected.

D) at least 1 ft above the lowest adjacent grade.

Explanation: Elevation above DFE is required for safety and continued operation.

Question 58

Breakaway walls must be designed to the greater of wind, earthquake, or what minimum load?

A) 5 psf.

B) 10 psf.

C) 15 psf.

D) 20 psf.

Explanation: A minimum of 10 psf is specified in addition to wind and seismic loads.

Question 59

In a V-zone, bracing of pile foundations is:

A) required for all buildings.

B) prohibited.

C) optional based on engineer preference.

D) required only for multi-story buildings.

Explanation: Bracing is prohibited because it increases debris accumulation and hydrodynamic forces.

Question 60

Flood damage-resistant materials are required:

A) above the DFE.

B) below the DFE.

C) throughout the entire building.

D) only in the foundation.

Explanation: Materials below the predicted flood level must be able to withstand inundation.