Chapter 07 - Concrete Plant Supervisor and Operations Questions with Correct Answers 2026

Chapter 07 - Concrete Plant Supervisor and
Operations Questions with Correct Answers 2026

What chemical reaction occurs when water and cement are combined?

A. Emulsification

B. Hydration

C. Solidification

D. Hydraulic fusion - CORRECT ANSWER -Hydration



What process must be minimized when stockpiling aggregates?

A. Segregation

B. Separation

C. Solidification

D. Disintegration - CORRECT ANSWER -Segregation



When a specific weight of aggregate isEcalled for, what type of scale is used?

A. Dial

B. Beam

C. Pressure

D. Balance - CORRECT ANSWER -Beam



Concrete mixed in a transit mixer should be delivered and discharged within 1 1/2 hours or befor
e the drum has revolved what maximum number of times?

A. 100

B. 200

C. 300

D. 400 - CORRECT ANSWER -300

, Portland cement is manufactured from finely ground limestone mixed with which materials?

1. Clay

2. Shale

3. Marl

4. All of the above - CORRECT ANSWER -All of the above



The chemical reaction between cement and water that produces concrete is

known by what term?

1. Concrete

2. Hydraulics

3. Hydration

4. Evaporation - CORRECT ANSWER -Hydration



How is laitance produced in concrete?

1. Water collects under the surface of the cement.

2. Cement is hydrated with saltwater.

3. Cement is hydrated with minimum water.

4. Cement is hydrated with excess water. - CORRECT ANSWER -
Cement is hydrated with excess water.



(True or False) Aggregate is the material combined with cement and water to

make concrete. - CORRECT ANSWER -True



Aggregates used in concrete occupy what percentage of the mixEby weight?

1. Between 90% to 95%