CONCRETE BATCH PLANT OPERATOR
EXAM (FDOT) QUESTIONS & ANSWERS
Stockpiles |of |aggregate |shall |be |maintained |in |a |well-drained |condition |in |order |to:
Correct |Answer: Minimize |Free |Water |Content
Coarse |aggregate |stockpiles |must |be |sprinkled |for |at |lest |how |many |hours |prior |to |batch
for |FDOT?
Correct |Answer: 24
Free |moisture |of |the |aggregate |means:
Correct |Answer: Moister |on |the |surface |of |an |aggregate |that |is |above |and |beyond
the |absorbed |moister |in |the |aggregate.
If |the |moister |test |is |done |other |than |by |the |cook-out |method, |how |often |shall |the |other
methods |be |verified?
Correct |Answer: Each |week
1
, For |drill |shaft |concrete, |the |quantity |of |cement |replaced |with |fly |ash |shall |be:
Correct |Answer: 33 |thru |37%
In |concrete, |which |material |has |a |specific |gravity |of |one?
Correct |Answer: Water
What |is |the |air |content |range |for |all |classes |of |structural |concrete |except |Class |IV
Shaft?
Correct |Answer: 1.00 |thru |6.00%
When |can |unmetered |water |be |added |to |the |concrete?
Correct |Answer: Not |at |all.
Do |not |allow |the |total |number |of |revolution |at |mixing |speed |to |exceed:
Correct |Answer: 160 |Revolutions
After |all |materials |have |been |charged |into |the |transit |mixer |drum, |the |concrete |must |be
mixed |at |how |many |revolutions |at |the |plant |before |leaving |for |the |project?
Correct |Answer: 70 |to |100
When |the |water |meters |/ |scales |are |calibrated, |prior |to |production, |at |what |frequency
should |they |be |checked |there |after?
Correct |Answer: 3 |moths
2
EXAM (FDOT) QUESTIONS & ANSWERS
Stockpiles |of |aggregate |shall |be |maintained |in |a |well-drained |condition |in |order |to:
Correct |Answer: Minimize |Free |Water |Content
Coarse |aggregate |stockpiles |must |be |sprinkled |for |at |lest |how |many |hours |prior |to |batch
for |FDOT?
Correct |Answer: 24
Free |moisture |of |the |aggregate |means:
Correct |Answer: Moister |on |the |surface |of |an |aggregate |that |is |above |and |beyond
the |absorbed |moister |in |the |aggregate.
If |the |moister |test |is |done |other |than |by |the |cook-out |method, |how |often |shall |the |other
methods |be |verified?
Correct |Answer: Each |week
1
, For |drill |shaft |concrete, |the |quantity |of |cement |replaced |with |fly |ash |shall |be:
Correct |Answer: 33 |thru |37%
In |concrete, |which |material |has |a |specific |gravity |of |one?
Correct |Answer: Water
What |is |the |air |content |range |for |all |classes |of |structural |concrete |except |Class |IV
Shaft?
Correct |Answer: 1.00 |thru |6.00%
When |can |unmetered |water |be |added |to |the |concrete?
Correct |Answer: Not |at |all.
Do |not |allow |the |total |number |of |revolution |at |mixing |speed |to |exceed:
Correct |Answer: 160 |Revolutions
After |all |materials |have |been |charged |into |the |transit |mixer |drum, |the |concrete |must |be
mixed |at |how |many |revolutions |at |the |plant |before |leaving |for |the |project?
Correct |Answer: 70 |to |100
When |the |water |meters |/ |scales |are |calibrated, |prior |to |production, |at |what |frequency
should |they |be |checked |there |after?
Correct |Answer: 3 |moths
2
