Quality Assurance 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 Quality Assurance flashcards as text
Which ASTM standard governs the procedure for obtaining representative samples of freshly mixed concrete?
Answer: ASTM C172
ASTM C172 is the standard practice for sampling freshly mixed concrete.
Field-cast concrete cylinders for acceptance testing are made and cured according to:
Answer: ASTM C31
ASTM C31 covers making and curing concrete test specimens in the field.
Per ASTM C31, standard-cured cylinders for concrete under 6,000 psi should be initially cured in the field for up to 48 hours at a temperature of:
Answer: 60°F to 80°F
ASTM C31 requires initial curing at 60–80°F for strengths below 6,000 psi.
Low cylinder results trigger core testing. Under ACI 318, concrete in the area is considered structurally adequate if the average of three cores is at least ___ of f'c and no single core is below ___ of f'c.
Answer: 85%; 75%
ACI 318 accepts cores averaging at least 85% of f'c with no single core below 75%.
In an inspection and test plan, what distinguishes a 'hold point' from a 'witness point'?
Answer: Work cannot proceed past a hold point until the designated inspector releases it
A hold point stops work until formal release, while a witness point only requires notice so the inspector may attend.
Under IBC Chapter 17, the Statement of Special Inspections is normally prepared by:
Answer: The registered design professional in responsible charge
IBC requires the registered design professional to prepare the statement of special inspections as part of the permit documents.
Which ASTM test method measures the air content of normal-weight fresh concrete using the pressure method?
Answer: ASTM C231
ASTM C231 is the pressure method, while C173 is the volumetric method used for lightweight concrete.