CCIL Certification Exam Questions With
Complete Solutions
What |standard |is |A23.2-1C? |- |CORRECT |ANSWER✔✔-Sampling |plastic |concrete |- |a |test |
method |that |specifies |the |procedures, |location, |and |sample |size |required |to |obtain |a |
representative |sample |of |fresh |concrete |and |to |assess |its |traceability |to |the |structure |it |
represents |(how |to |obtain |a |representative |sample |of |fresh |concrete |from |a |truck |agitator |or |
mixer
At |what |discharge |points |should |a |fresh |concrete |sample |be |taken |from |a |truck |agitator |or |
truck |mixer? |- |CORRECT |ANSWER✔✔-Between |the |10% |and |90% |points |of |discharge.
When |should |a |fresh |concrete |sample |not |be |taken |from |the |10% |and |90% |points |of |discharge
|from |a |truck |or |agitator? |- |CORRECT |ANSWER✔✔-1) |When |it |is |required |that |concrete |be |
tested |for |slump |immediately |prior |to |the |addition |of |superplasticizer
2) |When |precast |concrete |is |produced |in |a |stationary |precast |mixer
What |is |a |grab |sample |and |when |is |it |used |for |concrete |testing? |- |CORRECT |ANSWER✔✔-Grab
|sampling |is |the |operation |of |securing |at |one |point |of |the |discharge |the |required |volume |of |
representative |material |in |as |short |a |period |of |time |as |possible.
To |evaluate |for |quality |(strength |and |corresponding |related |plastic |concrete |properties) |- |
single |grab |sample |in |specific |location
To |evaluate |for |uniformity |- |three |grab |samples
When |sampling |for |uniformity |of |mixed |concrete, |how |many |sample |should |be |taken |and |
where? |- |CORRECT |ANSWER✔✔-Three |grab |samples |(not |to |be |formed |into |a |composite |
sample).
, Take |them |from |widely |separated |portions |of |the |batch |while |the |mixer |is |being |completely |
emptied.
When |collecting |samples |for |uniformity |testing |in |concrete, |how |should |the |mixer |be |
operating? |- |CORRECT |ANSWER✔✔-- |Discharge |the |concrete |at |the |normal |operating |rate |for |
the |mixer
- |Do |not |obstruct |or |retard |discharge |with |an |incompletely |opened |gate |or |seal
- |Do |not |allow |the |mixer |to |turn |in |the |mixing |direction |between |samples
- |Do |not |add |water |to |the |batch |once |sampling |has |started
If |you |will |be |casting |three |100mm |x |200mm |cylinders |for |strength |or |uniformity |testing, |how |
much |sample |must |be |collected? |- |CORRECT |ANSWER✔✔-A |minimum |of |20 |L |of |mixed |
concrete.
If |you |will |be |casting |three |150mm |x |300mm |cylinders |for |strength |or |uniformity |testing, |how |
much |sample |must |be |collected? |- |CORRECT |ANSWER✔✔-A |minimum |of |30 |L |of |mixed |
concrete.
If |you |will |be |casting |three |150mm |x |150mm |x |535mm |beams |for |testing, |how |much |sample |
must |be |collected? |- |CORRECT |ANSWER✔✔-A |minimum |of |55 |L |of |mixed |concrete.
If |you |are |creating |more |than |3 |samples |(beams |or |cylinders), |how |much |more |concrete |
sample |do |you |need |to |collect? |- |CORRECT |ANSWER✔✔-The |volume |of |the |extra |specimens |
plus |10%.
Can |you |reuse |concrete |from |the |slump |test |for |other |tests? |- |CORRECT |ANSWER✔✔-Yes.
How |should |a |sample |be |physically |collected |from |a |stream |of |concrete? |- |CORRECT |
ANSWER✔✔-By |passing |a |receptacle |completely |through |the |discharge |stream |or |by |
completely |diverting |the |discharge |into |a |sample |container.
Complete Solutions
What |standard |is |A23.2-1C? |- |CORRECT |ANSWER✔✔-Sampling |plastic |concrete |- |a |test |
method |that |specifies |the |procedures, |location, |and |sample |size |required |to |obtain |a |
representative |sample |of |fresh |concrete |and |to |assess |its |traceability |to |the |structure |it |
represents |(how |to |obtain |a |representative |sample |of |fresh |concrete |from |a |truck |agitator |or |
mixer
At |what |discharge |points |should |a |fresh |concrete |sample |be |taken |from |a |truck |agitator |or |
truck |mixer? |- |CORRECT |ANSWER✔✔-Between |the |10% |and |90% |points |of |discharge.
When |should |a |fresh |concrete |sample |not |be |taken |from |the |10% |and |90% |points |of |discharge
|from |a |truck |or |agitator? |- |CORRECT |ANSWER✔✔-1) |When |it |is |required |that |concrete |be |
tested |for |slump |immediately |prior |to |the |addition |of |superplasticizer
2) |When |precast |concrete |is |produced |in |a |stationary |precast |mixer
What |is |a |grab |sample |and |when |is |it |used |for |concrete |testing? |- |CORRECT |ANSWER✔✔-Grab
|sampling |is |the |operation |of |securing |at |one |point |of |the |discharge |the |required |volume |of |
representative |material |in |as |short |a |period |of |time |as |possible.
To |evaluate |for |quality |(strength |and |corresponding |related |plastic |concrete |properties) |- |
single |grab |sample |in |specific |location
To |evaluate |for |uniformity |- |three |grab |samples
When |sampling |for |uniformity |of |mixed |concrete, |how |many |sample |should |be |taken |and |
where? |- |CORRECT |ANSWER✔✔-Three |grab |samples |(not |to |be |formed |into |a |composite |
sample).
, Take |them |from |widely |separated |portions |of |the |batch |while |the |mixer |is |being |completely |
emptied.
When |collecting |samples |for |uniformity |testing |in |concrete, |how |should |the |mixer |be |
operating? |- |CORRECT |ANSWER✔✔-- |Discharge |the |concrete |at |the |normal |operating |rate |for |
the |mixer
- |Do |not |obstruct |or |retard |discharge |with |an |incompletely |opened |gate |or |seal
- |Do |not |allow |the |mixer |to |turn |in |the |mixing |direction |between |samples
- |Do |not |add |water |to |the |batch |once |sampling |has |started
If |you |will |be |casting |three |100mm |x |200mm |cylinders |for |strength |or |uniformity |testing, |how |
much |sample |must |be |collected? |- |CORRECT |ANSWER✔✔-A |minimum |of |20 |L |of |mixed |
concrete.
If |you |will |be |casting |three |150mm |x |300mm |cylinders |for |strength |or |uniformity |testing, |how |
much |sample |must |be |collected? |- |CORRECT |ANSWER✔✔-A |minimum |of |30 |L |of |mixed |
concrete.
If |you |will |be |casting |three |150mm |x |150mm |x |535mm |beams |for |testing, |how |much |sample |
must |be |collected? |- |CORRECT |ANSWER✔✔-A |minimum |of |55 |L |of |mixed |concrete.
If |you |are |creating |more |than |3 |samples |(beams |or |cylinders), |how |much |more |concrete |
sample |do |you |need |to |collect? |- |CORRECT |ANSWER✔✔-The |volume |of |the |extra |specimens |
plus |10%.
Can |you |reuse |concrete |from |the |slump |test |for |other |tests? |- |CORRECT |ANSWER✔✔-Yes.
How |should |a |sample |be |physically |collected |from |a |stream |of |concrete? |- |CORRECT |
ANSWER✔✔-By |passing |a |receptacle |completely |through |the |discharge |stream |or |by |
completely |diverting |the |discharge |into |a |sample |container.
