Exam (elaborations)
ACI WRITTEN TEST EXAM 2024
- Course
- Institution
ACI WRITTEN TEST EXAM 2024
[Show more]
Content preview
ACI WRITTEN TEST EXAM 2024(ASTM C31): How big must tamping rods be for molds less than 6" diameter/width -
ANSWER 3/8" diameter
Pressure test is good for _____ aggregates. Volumetric test is good for _____ -
ANSWER dense; any type of aggregate (dense, cellular, or lightweight)
(ASTM C173): measuring bowl shall have diameter ______times the height -
ANSWER 1-1.25times
(ASTM C173): measuring bowls shall not have a capactiy of less than __L -
ANSWER 2
(ASTM C173): the top section shall have a capacity of at least __% larger than the
measuring bowl - ANSWER 20
(ASTM C173): the top section shall be equipped with a transparent scale, graduated
in increments not greater than 0.5% from - ANSWER 0 to 9%
(ASTM C173): the funnel should be long enough to ________ - ANSWER extend to
a point just above the bottom of the top section
(ASTM C173): the discharge end of the spout shall be so constructed that when
water is added there will be ________ - ANSWER a minimum disturbance of the
concrete
(ASTM C173): alcohol vessel with minimum capacity of at least __pint with
graduations not larger than __mL. Rubber syringe having capacity of ____mL. Water
container of __L capacity - ANSWER 1; 50; 1
(ASTM C173): use __% by volume isopropyl alcohol. Other foam-dispersing agents
are permitted if air content doesn't change more than ___%. Mallet with mass of
__lbs - ANSWER 70; 0.1; 1.25
(ASTM C173): if aggregates would be retained on a 1-1/2inch sieve, then wet sieve
over a __inch sieve - ANSWER 1
(ASTM C173): if more than ___L of alcohol is used a correction to the final meter is
required. ROund the volume of alcohol to the nearest ___L - ANSWER 1.25; 0.5
(ASTM C173): Air content equals - ANSWER final meter reading % (AR)-Correction
factor (C)+W(number of added calibrated cups of water
(ASTM C173): this test is not affected by air that may be present inside _________ -
ANSWER porous aggregate particles
, (ASTM C31): How many vibrations/min must vibrators produce? - ANSWER
9000vib/min
(ASTM C31): Vibrating element must be no bigger than_____ the cylinder diameter -
ANSWER 1/4th
(ASTM C31): Vibrators must be used for slumps _____" or less - ANSWER 1"
(ASTM C31): When rodding a 4" diameter cylinder fill in ___ layers; When rodding a
6" diameter cylinder fill in ___ layers - ANSWER 2; 3
(ASTM C31): How many times do tap outside of mold? - ANSWER 10-15 times with
mallet or hand for cylinder mold
(ASTM C31): How long do you insert rod or vibrator in lift? - ANSWER 1"
(ASTM C31): Cylinder must be at least ___ times the size of the coarse aggregate -
ANSWER 3
(ASTM C31): Aggregate larger than ___" must be wet-sieved out of the mix -
ANSWER 2"
(ASTM C31): Cylinder molds must be ______ the length of the diameter - ANSWER
twice
(ASTM C31): When rodding beams, fill in __ layers for beam widths 6-8"; fill in __
layers for beam widths greater than 8" - ANSWER 2; 3 or more
(ASTM C31): When vibrating beams, fill in __ layers for beam widths 6-8"; fill in __
layers for beam widths greater than 8" - ANSWER 1; 2 or more
(ASTM C31): Beams must be at least _____ times the size of the coarse aggregate
in the smallest cross section - ANSWER 3
(ASTM C31): Beam molds length must be at least __" greater than __ times the
depth - ANSWER 2"; 3
(ASTM C31): Beam mold width must not exceed __ times the depth - ANSWER 1.5
(ASTM C31): Depths and widths for beam molds must be at least __" - ANSWER
6"
(ASTM C31): When planning to mold and cure concrete specimens it is required that
which tests are to be performed? - ANSWER slump, temp., and air content if there
is air entrainer
(ASTM C31): During initial curing what temperature must the cylinders be stored in
and what environment? - ANSWER 60-80 degrees F and an environment that
prevents moisture loss for up to 48 hours
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller leonardmuriithi061. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $17.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76658 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now