Quiz 2

On what angle may a rebound hammer be used on a concrete surface?

• horizontal

• vertically overhead

• vertically downward

• intermediate angle

Which parameters influence the results of a rebound hammer when used on a concrete surface?

• Shape size and rigidity of specimen

• Type of coarse aggregate

• Surface condition of concrete

• Surface smoothness

An ultrasonic pulse velocity test is an _____________

• Ex-situ, nondestructive test

• In-situ, nondestructive test

• Ex-situ, destructive test

• In-situ, destructive test

In UPV, The ___ of an ultrasonic pulse is used to measure the strength and quality of concrete or rock

• Length

• Velocity

• Weight

• Surface Tension

Which of the following is not a representation of a UPV application?

• establish uniformity in concrete

• Determine setting characteristics of concrete

• Durability of concrete exploration

• None of Them

Which method uses X-rays and Gamma-rays for testing the properties of concrete?

• Electronic

• Mechanical

• Radioactive

• Microscopic

The darker region on the radiography film indicates a concrete ______ flaw.

• Corrosion

• Efflorescence

• voids

• Finishing errors

Direct measurement of radiation traveling through a concrete body up to ______ mm is possible in radiometry testing.

• 200

• 400

• 600

• 300

Which method is used to measure the depth of reinforcement cover and detect the position of reinforcement bars?

• Mechanical

• Electrical

• microscopic

• magnetic

Which equipment is utilized to determine the depth of the reinforcing cover and the location of the reinforcement bars?

• pulse echo

• Infrared

• radar

• cover meter