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CSA A23.2-3C - MAKING AND CURING COMPRESSION SPECIMENS EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+

Flexural specimens must be at least _______mm longer than the length of the_______? -
<>50 --- Span
For 100 X200 mm cylinders the tamping rod shall be ______+- __mm diameter by
_______X______in length - <>10 +- 1----450 ---600
For 150 X300 mm cylinders the tamping rod shall be ______+- __mm diameter by
_______X______in length - <>16 +- 1----450 ---600
All tamping rods must have at least ______ hemispherical end? - <>one
Rubber or rawhide mallet should approximately weigh ____ +- ____Kg? - <>0.6--0.3
External plank or table vibrators shall have a minimum frequency of_____Hz - <>60
Plank or table vibrator must have a means to _______ molds securely? - <>Clamp
Internal vibrators shall be ______HZ or greater, with an outside element of ____ to_____mm -
<>120 -- 20 --40
A ___________ should be used to check frequency of vibration for Plank and table top vibrators? -
<>Tachometer
A steel strike off bar shall be _____mm thick ______mm width ______mm in length? -
<>6 -- 25 -- 450
Water storage tanks must have a controlled temperature of _____C +- ___ - <>23 +- 2
Manual temperatures of water storage tanks must be taken _____ times a ______? -
<>2 --- Day
How many times in a seven day week must the the water storage tanks be recorded _____? with an
accuracy of ____C for recording - <>5 -- 0.5C
Variation between connected water tanks shall not exceed ___C when checked and recorded
________? - <>1 ---- Weekly
Water tanks shall be saturated with ________ - _______ (high calcium hydrated lime) to prevent
__________? - <>Calcium - Hydroxide --- Leaching
Water storage tanks shall be stirred at intervals not to exceed one ______ to help replace ______ -
______ that have depleted? - <>Month --- Calcium --Ions
Tanks shall be cleaned and refilled every _____months and charged with calcium of a ratio of ___g/L
to water? - <>24 -- 3
PH is a reliable indicator of lime saturation? True or False - <>False
A moist cabinet or moist room shall have a relative humidity not less than ____% and controlled
temperature of _____+- _____
note: Humidity recorders are optional. - <>95 -- 23 -- 2
Specimens stored in a moist cabinet or room must _____ and _______ moist - <>Appear
-- Feel
All moist Cabinets and rooms must be equipped with a _________recorder? -
<>Temperature
The air inside a moist cabinet or room may be controlled in two ways __________ & _________? -
<>Heating -- Coolin