Testing Methods Flashcards
7 cards from real ASCE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Testing Methods flashcards as text
The Los Angeles abrasion test (ASTM C131) evaluates which aggregate property?
Answer: Resistance to degradation by abrasion and impact
The LA test tumbles aggregate with steel spheres and reports percent loss as a measure of toughness and abrasion resistance.
In Marshall mix design for heavy-traffic pavements, how many blows per side are typically applied to compact specimens?
Answer: 75
Heavy traffic Marshall designs use 75 blows per side, while medium and light traffic use 50 and 35.
In Superpave mix design, what is the typical target air void content at Ndesign gyrations?
Answer: 4%
Superpave selects the design binder content that produces 4% air voids at Ndesign.
How is the fineness modulus of fine aggregate calculated?
Answer: Sum of cumulative percentages retained on standard sieves divided by 100
Fineness modulus is the sum of cumulative percent retained on specified standard sieves divided by 100, with higher values indicating coarser sand.
An ASTM A615 Grade 60 reinforcing bar must have a minimum yield strength of:
Answer: 60 ksi
The grade designation indicates minimum yield strength in ksi, so Grade 60 requires 60,000 psi.
Magnetic particle testing of welds has which key limitation?
Answer: It works only on ferromagnetic materials and detects surface or near-surface defects
MT relies on magnetic flux leakage, so it is limited to ferromagnetic metals and surface or slightly subsurface discontinuities.
Which nondestructive method is commonly used to detect internal discontinuities in complete-joint-penetration groove welds in steel structures?
Answer: Ultrasonic testing
Ultrasonic testing sends sound waves through the full weld thickness to find internal flaws such as lack of fusion and slag inclusions.