Exam (elaborations)
6 Air Content of Freshly Mixed Concrete by the Volumetric Method Questions and Answers 2024
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6 Air Content of Freshly Mixed Concrete by the Volumetric Method
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6: Air Content of Freshly Mixed Concreteby the Volumetric Method
~ 40. The air content as determined by the volumetric method is reported to the nearest:
A. 0.10%
B. 0.15%
C. 0.20%
D. 0.25%
E. 0.50% - answer D. 0.25%
~ 41. This test method covers determination of the air content of freshly mixed concrete
containing:
A. Relatively dense aggregate only
B. Lightweight aggregate only
C. Air-cooled blast furnace slag only
D. any type of aggregate - answer D. any type of aggregate
~ 42. After an initial meter reading has been recorded, the next meter reading should be
recorded as the final meter reading if this meter reasung has not changed more than
___ from the initial meter reading:
A. 0.1%
B. 0.25%
C. 0.5%
D. 1.0% - answer B. 0.25%
~ 43. After rodding and tapping the final layer, test method C173/C173M requires the
excess concrete be struck off with a:
A. Tamping rod
B. Trowel
C. Strike-off bar
D. Strike-off plate - answer C. Strike-off bar
~ 44. The addition of alcohol to dispel foam after the initial filling of the meter to the zero
mark is:
A. Not permitted
B. Allowable after the rolling procedure to bring the liquid level within the graduated
range if the air content is greater than the 9% range of the meter.
C. Allowable to replace any liquid that leaked from the meter during the inversion and
rolling procedures
D. Mandatory - answer A
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