Equipment Operator Advanced
Concrete Batch Plant
Supervisor and Operations
Comprehensive Questions
(Frequently Tested) with
Verified Answers Graded A+
(True or False) Fine aggregates are those materials that are retained on a No. 4 sieve.
• True
• False - Answer: False
With how many strokes should you rod each layer of concrete placed in the compressive
strength TEST MOLD?
• 10
• 15
• 20
• 25 - Answer: 25
, (True or False) The major factor controlling the durability of concrete is its strength.
• True
• False - Answer: True
How is laitance produced in concrete?
• Water collects under the surface of the CEMENT
• Cement is hydrated with saltwater
• Cement is hydrated with minimum water
• Cement is hydrated with excess water - Answer: Cement is hydrated with excess water
What percent do water reducing admixtures usually reduce the required water content for a
concrete mixture?
• 1% to 2% only
• 1% to 3%
• 3% to 7%
• 5% to 10% - Answer: 5% to 10%
Concrete is denser and stronger when which condition is met?
• All voids are filled
• Voids are large and unfilled
• Aggregate particles are not solidly BONDED
• Aggregate particles are not coated with a cement-water paste - Answer: All voids are filled
Concrete Batch Plant
Supervisor and Operations
Comprehensive Questions
(Frequently Tested) with
Verified Answers Graded A+
(True or False) Fine aggregates are those materials that are retained on a No. 4 sieve.
• True
• False - Answer: False
With how many strokes should you rod each layer of concrete placed in the compressive
strength TEST MOLD?
• 10
• 15
• 20
• 25 - Answer: 25
, (True or False) The major factor controlling the durability of concrete is its strength.
• True
• False - Answer: True
How is laitance produced in concrete?
• Water collects under the surface of the CEMENT
• Cement is hydrated with saltwater
• Cement is hydrated with minimum water
• Cement is hydrated with excess water - Answer: Cement is hydrated with excess water
What percent do water reducing admixtures usually reduce the required water content for a
concrete mixture?
• 1% to 2% only
• 1% to 3%
• 3% to 7%
• 5% to 10% - Answer: 5% to 10%
Concrete is denser and stronger when which condition is met?
• All voids are filled
• Voids are large and unfilled
• Aggregate particles are not solidly BONDED
• Aggregate particles are not coated with a cement-water paste - Answer: All voids are filled
