Quiz - Osha Ask

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 is the reported accuracy of the reference temperature measuring device?

D) ±1.0 °C

C) ±0.5 °C

A) ±0.1 °C

B) ±0.2 °C

2 / 10

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

To the bottom of the container

To a depth of 3 inches

So that it is entirely submerged

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

3 / 10

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

B) 2-5 minutes

A) 1 minute

C) 10 minutes

D) 15 minutes

4 / 10

Which ASTM standard is referenced for the definition of terms used in ASTM C1064?

B) C150

A) C125

C) C172

D) C670

5 / 10

At what maximum time interval after obtaining the sample should the temperature of the concrete be measured?

15 Minutes

5 Minutes

7 Minutes

10 Minutes

6 / 10

Which committee is responsible for the ASTM C1064 standard?

A) Committee C09 on Cement

D) Committee C15 on Manufactured Masonry Units

C) Committee C12 on Mortar and Grout

B) Committee C09 on Concrete and Concrete Aggregates

7 / 10

What is the primary purpose of ASTM C1064?

A) To determine the chemical composition of concrete

C) To assess the drying time of concrete

D) To evaluate the tensile strength of concrete

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

8 / 10

What should be done to the sample container before sampling freshly mixed concrete?

B) It should be heated

C) It should be dampened with water

D) It should be lined with plastic

A) It should be coated with a non-stick spray

9 / 10

What is the minimum immersion depth for the temperature measuring device in the concrete?

B) 75 mm

A) 50 mm

C) 100 mm

D) 125 mm

10 / 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?

± 2.0 °F (± 1.0 °C)

± 1.5 °F (± 0.8 °C)

± 0.5 °F (± 0.3 °C)

± 1.0 °F (± 0.5 °C)

Your score is

The average score is 67%