CPII Code Requirements 3

Question 1

According to the International Plumbing Code (IPC), what is the minimum slope required for horizontal drainage piping with a diameter of 3 inches or less?

Accepted Answer

1/4 inch per foot

Answer

The IPC requires horizontal drainage pipe 3 inches in diameter or less to slope at a minimum of 1/4 inch per foot (2%) to ensure proper flow.

Question 2

Under AASHTO LRFD Bridge Design Specifications, what minimum live load model must be used when designing public highway bridges?

Accepted Answer

HL-93

Answer

AASHTO LRFD specifications require the HL-93 notional load model, which consists of a combination of a design truck or tandem plus a design lane load.

Question 3

A concrete sidewalk panel is observed with a vertical displacement of 3/4 inch between sections. Under ADA accessibility guidelines, this condition primarily represents a violation of which requirement?

Accepted Answer

Surface discontinuity limit

Answer

ADA guidelines limit surface discontinuities (vertical changes in level) to 1/4 inch maximum, or 1/2 inch if beveled at 1:2 slope; 3/4 inch exceeds both thresholds.

Question 4

Which ASTM standard governs the specification for Portland cement used in public infrastructure concrete construction?

Accepted Answer

ASTM C150

Answer

ASTM C150 is the Standard Specification for Portland Cement, defining the eight types and their chemical and physical requirements.

Question 5

Under the Clean Water Act (CWA) Section 402, a construction site disturbing one or more acres must obtain which type of permit?

Accepted Answer

NPDES Construction General Permit

Answer

EPA's NPDES Construction General Permit (CGP) under CWA Section 402 is required for stormwater discharges from construction sites disturbing one acre or more.

(CPII) Certified Public Infrastructure Inspector Practice Test

(CPII) Certified Public Infrastructure Inspector Practice Test

CPII Code Requirements 3