CCIL laboratory testing questions with correct answers.

CCIL laboratory testing questions with
correct answers

When |do |lab |cured |cylinders |need |to |be |demolded? |- |CORRECT |ANSWER✔✔-20 |+/- |4 |hrs |
after |casting |time



When |do |field |cured |cylinders |need |to |be |demolded? |- |CORRECT |ANSWER✔✔-28 |+/- |8 |hrs |
after |casting |time



Why |can |lab |cured |cylinders |be |demolded |earlier |than |field |cured |cylinders? |- |CORRECT |
ANSWER✔✔-This |is |because |field |cured |cylinders |will |need |to |be |transported |to |a |lab |so |they |
need |the |extra |time |to |ensure |that |the |cylinders |set |properly |before |being |moved |around.



When |are |cardboard |moulds |used? |- |CORRECT |ANSWER✔✔-For |concrete |<35 |MPA



What |temperature |should |the |curing |tanks |be |kept |at |and |how |often |should |they |be |
monitered. |- |CORRECT |ANSWER✔✔-Temp. |should |be |at |23 |+/- |2 |C |and |temperature |recorder |
should |be |kept |in |the |tank |and |checked |twice |a |day |at |least |5 |days |per |week |accurate |to |0.5 |
C.



What |should |the |tanks |be |saturated |with |? |- |CORRECT |ANSWER✔✔-Calcium |hydroxide



What |ratio |should |the |cylinders |length |be |to |its |diameter? |- |CORRECT |ANSWER✔✔-2:1



Initial |curing |in |"field" |temp. |? |- |CORRECT |ANSWER✔✔-15 |- |25 |C