ACI EXAMINATION 2 WITH CORRECT ANSWERS
Slump. If the concrete sample breaks or shears laterally when the slump cone is raised, the concrete test
should be ........... with a fresh portion ✔✔Answer Redone
Slump. The slump of the concrete is measured to the nearest ..........? ✔✔5 mm
Slump. The slump cone should be raised using a steady upwards lift over a .............. second interval
✔✔5
Slump. Once consolidation of concrete sample is complete, the top of the slump cone is stuck of using
the ? ✔✔Tamping rod or struck of rod
Slump. When rodding into the second & third layer, the tamping rod should penetrate approximately
...............mm into the previous layers ✔✔25mm
Slump. Each layer is rodded ............... times with the strokes uniformly distributed over the cross -
section ✔✔25 times
Slump. The slump cone is filled in ........... equal layers of volume ✔✔3 layers
Slump. The slump test shall be completed within ........... minutes after the sample has been transported
and remixed ✔✔10 min
Slump. The surface upon which to perform the slump test shall be .................., flat and ...............
✔✔Rigid and non-absorbant
Slump. The tamping rod used for slump test has a diameter of......... & between ............ & ............... in
length ✔✔16 mm +or- 1 mm, length of 450 and 600 mm
, Slump. The slump cone is a frustum of a cone with a base off............ and a top diameter of .............
✔✔Base = 200
Top =100
Slump. Slump is a measure of the .............. of freshly mixed hydraulic cement concrete ✔✔Consistency
Slump.The measure of consistency of fresh mixed hydraulic cement concrete, mortar, or stucco is
measured to the nearest ...........mm? ✔✔5 mm
Air. The air content of concrete sample must be recorded to the nearest ..........% ✔✔0.1 %
Air. When completing the consolidation process, the optimum amount of excess concrete protruding
about the top of the bowl is .........? ✔✔3 mm
Air . Over vibration of the concrete sample results in ......... & the loss of significant amount of
...............from the concrete sample? ✔✔En-trained Air and Segregation
Air. When Vibration is used as the consolidation method, the bowl shall be filled in .............. layers ✔✔2
layers
Air. The purpose of tapping the bowl with a mallet 10 - 15 times after consolidation is to release
any.............. that might have been trapped during the rodding process ✔✔En-trained Air
Air. Concrete samples with a slump of 40 mm or less must be consolidated in the bowl with
..................... ✔✔Vibrator
Air. A air meter shall be calibrated before each use to ensure an accurate reading. This statement is
.................. ✔✔False
Air. A 7 Litre bowl may be used to test the air content with a nominal maximum aggregate size larger
than 40 mm provided that the concrete sample is wet sieved over a .......... mm opening ✔✔40 mm
Slump. If the concrete sample breaks or shears laterally when the slump cone is raised, the concrete test
should be ........... with a fresh portion ✔✔Answer Redone
Slump. The slump of the concrete is measured to the nearest ..........? ✔✔5 mm
Slump. The slump cone should be raised using a steady upwards lift over a .............. second interval
✔✔5
Slump. Once consolidation of concrete sample is complete, the top of the slump cone is stuck of using
the ? ✔✔Tamping rod or struck of rod
Slump. When rodding into the second & third layer, the tamping rod should penetrate approximately
...............mm into the previous layers ✔✔25mm
Slump. Each layer is rodded ............... times with the strokes uniformly distributed over the cross -
section ✔✔25 times
Slump. The slump cone is filled in ........... equal layers of volume ✔✔3 layers
Slump. The slump test shall be completed within ........... minutes after the sample has been transported
and remixed ✔✔10 min
Slump. The surface upon which to perform the slump test shall be .................., flat and ...............
✔✔Rigid and non-absorbant
Slump. The tamping rod used for slump test has a diameter of......... & between ............ & ............... in
length ✔✔16 mm +or- 1 mm, length of 450 and 600 mm
, Slump. The slump cone is a frustum of a cone with a base off............ and a top diameter of .............
✔✔Base = 200
Top =100
Slump. Slump is a measure of the .............. of freshly mixed hydraulic cement concrete ✔✔Consistency
Slump.The measure of consistency of fresh mixed hydraulic cement concrete, mortar, or stucco is
measured to the nearest ...........mm? ✔✔5 mm
Air. The air content of concrete sample must be recorded to the nearest ..........% ✔✔0.1 %
Air. When completing the consolidation process, the optimum amount of excess concrete protruding
about the top of the bowl is .........? ✔✔3 mm
Air . Over vibration of the concrete sample results in ......... & the loss of significant amount of
...............from the concrete sample? ✔✔En-trained Air and Segregation
Air. When Vibration is used as the consolidation method, the bowl shall be filled in .............. layers ✔✔2
layers
Air. The purpose of tapping the bowl with a mallet 10 - 15 times after consolidation is to release
any.............. that might have been trapped during the rodding process ✔✔En-trained Air
Air. Concrete samples with a slump of 40 mm or less must be consolidated in the bowl with
..................... ✔✔Vibrator
Air. A air meter shall be calibrated before each use to ensure an accurate reading. This statement is
.................. ✔✔False
Air. A 7 Litre bowl may be used to test the air content with a nominal maximum aggregate size larger
than 40 mm provided that the concrete sample is wet sieved over a .......... mm opening ✔✔40 mm
