Prep Flashcards
7 cards from real Civil Engineering PE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Prep flashcards as text
A 10-ft diameter circular pipe flows half-full. The hydraulic radius is:
Answer: 2.5 ft
For a circular pipe at half-full, R = D/4 = 10/4 = 2.5 ft.
Which AASHTO soil classification group generally represents the best subgrade material?
Answer: A-1-a
A-1-a represents well-graded gravel and sand with excellent subgrade performance (GI = 0).
The critical path in a CPM schedule is defined as the sequence of activities that:
Answer: Has zero total float and determines project duration
The critical path consists of activities with zero total float; any delay extends the project end date.
A steel column with an effective length KL = 15 ft and radius of gyration r = 2 in has a slenderness ratio of:
Answer: 90
KL/r = (15×12)/2 = 180/2 = 90.
In stormwater design, the Rational Method formula Q = CiA requires the rainfall intensity (i) to be evaluated at:
Answer: The time of concentration of the watershed
i is selected from IDF curves at the storm frequency and duration equal to the time of concentration.
For a prestressed concrete beam, the term 'prestress losses' refers to:
Answer: Reduction in initial prestress force over time due to creep, shrinkage, and relaxation
Prestress losses include elastic shortening, creep, shrinkage of concrete, and relaxation of tendons.
A horizontal curve on a highway has a radius of 1,500 ft and a design speed of 60 mph. The required superelevation is most closely governed by:
Answer: AASHTO Green Book design tables balancing e and f
AASHTO distributes superelevation (e) and side friction (f) per design speed and radius tables.