ASTM C 1064, Temperature

Question 1

When the nominal maximum size (NMS) of the coarse aggregate is greater than 3 inches, it may require up to_____ minutes for the transfer of heat between the aggregate and mortar.
A. 5
B. 10
C. 15
D. 20

Answer 1

20

Question 2

A container used for the temperature test shall be large enough to provide at least _____ inch(es) or 3 times the NMS of the coarse aggregate as concrete cover in all directions around the sensing portion of the temperature measuring device.
A. 1
B. 1‐1/2
C. 2
D. 3

Answer 2

3

Question 3

A temperature measuring device shall have a capability of measuring the temperature of freshly mixed concrete in the range of
A. 60 to 80 F.
B. 30 to 120 F.
C. 0 to 120 F.
D. 30 to 80 F.

Answer 3

30 to 120 F

Question 4

The temperature measuring device shall have a capability of measuring the temperature of freshly mixed concrete to _____ degree(s) F.
A. +/‐ 1
B. +/‐ 1.5
C. +/‐ 2
D. +/‐ 0.5

Answer 4

+/- 1

Question 5

A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature.
(T or F)

Answer 5

False

Question 6

Each temperature measuring device used for determining concrete temperature shall be verified _____ or whenever there is a question of accuracy.
A. once every six months
B. annually
C. prior to each use
D. when initially received

Answer 6

annually

Question 7

The temperature of freshly mixed concrete can be measured in
A. an adequately sized container.
B. transportation equipment.
C. forms.
D. all of the above.

Answer 7

all of the above
A: an adequately sized container
B: transportation equipment
C: forms

Question 8

Submerge the sensing portion of the temperature measuring device a minimum of _____ inch(es) into the concrete.
A. 1
B. 1‐1/2
C. 2
D. 3

Answer 8

3

Question 9

Concrete is gently pressed up against the temperature measuring device to close the void created by inserting the TMD in the concrete and so that _____ does not affect the temperature reading.
A. bleed water
B. ambient (outside) air temperature
C. the sun
D. the wind

Answer 9

ambient (outside) air temperature

Question 10

Leave the temperature measuring device in the concrete for at least _____ minute(s) before taking a reading.
A. 1
B. 2
C. 3
D. 4

Answer 10

2

Question 11

Assuming the coarse aggregate size is less than 3 inches, read the temperature of the concrete within _____minutes
A. 2
B. 3
C. 4
D. 5

Answer 11

5

Question 12

The temperature of freshly mixed concrete is read and recorded to the nearest _____ degree(s) F.
A. 0.5
B. 1
C. 2
D. 5

Answer 12

1

Question 13

A certificate, or report, that verifies the accuracy of the reference temperature measuring device shall be available for inspection in the laboratory.
(T or F)

Answer 13

True

Question 14

The reference temperature measuring device shall be readable to _____ degree(s) F.
A. +/‐ 0.5
B. +/‐ 1
C. +/‐ 2
D. +/‐ 5

Answer 14

+/- 0.5

Question 15

The temperature measuring device must remain the concrete while a temperature reading is taken.
(T or F)

Answer 15

True

Question 16

The measured temperature represents the temperature at the time of testing and may not be an indication of the temperature at a later time.
(T or F)

Answer 16

True