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C1064/C1064M – 17—Temperature of Freshly Mixed Hydraulic-Cement Concrete

This test method covers the determination of temperature of freshly mixed hydraulic-cement concrete.

1 / 10

What should be done after placing the temperature measuring device in the freshly mixed concrete?

B) Gently press the concrete around the device at the surface to close the void

D) Stir the concrete around the device

A) Press down on the device to submerge it deeper

C) Add more concrete to the container

2 / 10

According to ASTM C1064, what should be done if the temperature measuring device fails verification?

B) Adjust and reverify the device

D) Send the device for manufacturer recalibration

C) Use the device for another purpose

A) Discard the device

3 / 10

What is the reported accuracy of the reference temperature measuring device?

B) ±0.2 °C

C) ±0.5 °C

A) ±0.1 °C

D) ±1.0 °C

4 / 10

How should the thermometer be inserted into the concrete sample to ensure an accurate temperature reading?

So that it is entirely submerged

To the bottom of the container

To a depth of 3 inches

To a depth of 2 to 3 inches from the bottom of the container

5 / 10

What is the significance of the number following the designation C1064/C1064M in the standard?

C) It specifies the number of pages in the standard

B) It indicates the year of last revision

A) It indicates the number of revisions

D) It designates the section number

6 / 10

What is the primary purpose of ASTM C1064?

A) To determine the chemical composition of concrete

B) To measure the temperature of freshly mixed hydraulic-cement concrete

D) To evaluate the tensile strength of concrete

C) To assess the drying time of concrete

7 / 10

How long should the temperature measuring device remain in the concrete to obtain a reading?

A) 1 minute

D) 15 minutes

B) 2-5 minutes

C) 10 minutes

8 / 10

According to ASTM C1064/C1064M, the temperature measuring device must be capable of accurately measuring the temperature of fresh concrete to within what range?

± 0.5 °F (± 0.3 °C)

± 1.5 °F (± 0.8 °C)

± 1.0 °F (± 0.5 °C)

± 2.0 °F (± 1.0 °C)

9 / 10

What is the minimum period that the thermometer should be left in the concrete to ensure a stable reading?

2 minutes

1 minutes

10 minutes

5 minutes

10 / 10

Within how many minutes should the temperature of freshly mixed concrete be measured after obtaining the sample?

A) 30 minutes

B) 15 minutes

D) 60 minutes

C) 5 minutes

Your score is

The average score is 67%