PE Agricultural case studies
PE Agricultural · Put your knowledge to work in context.
The Principles and Practice of Engineering (PE) Agricultural and Biological Engineering exam is one of the discipline-specific PE exams offered by NCEES, which states that it offers more than 20 different PE exams. NCEES describes the PE exam as testing for a minimum level of competency in a particular engineering discipline, and says it is designed for engineers who have gained a minimum of four years of post-college work experience in their chosen discipline. The PE Agricultural case studies are 5 cases and about 4,172 words.
1Cooling and Drying 18% Corn With an Undersized Fan
A 30-ft-diameter, 24-ft-eave bin holds 12,000 bu of 18% corn harvested at 80 °F. The only aeration is a 15-hp centrifugal fan rated 6,000 cfm at 4 in.
843 words, about 4 min2HTST Hold Time After a Flow Increase
A small dairy runs a 6,000 L/h HTST that pasteurizes 3.5% milk at 72 °C for 15 s. The holding tube is 22 L of 50-mm-ID sanitary tubing with no flow-control device; the recorder shows 72.5 °C throughout the run.
849 words, about 4 min3Phosphorus-Limited Land Application for a Swine Lagoon
A 2,400-head swine finishing site produces about 1.8 million gal/yr of anaerobic lagoon liquid. The farm has 100 acres of rented corn ground with a 180 bu/ac yield goal and a soil test showing Olsen P of 48 ppm (Very High).
823 words, about 4 min4Roof-Mounted PV to Offset an Irrigation Pump
A 40-acre center pivot is rated 800 gpm at 60 psi at the pump discharge; pump efficiency is 70% and the motor and drive train 92%. The season is 1,400 pump hours.
820 words, about 4 min5Substituted Purlins Five Days Before Flock Placement
You are the engineer of record for a 60,000-hen layer barn and attached manure-drying building. Five days before flock placement you find the contractor installed 8-in.
837 words, about 4 min