Question

which instrument are used for measuring internal deformation and cracking​

Answer 1

Explanation:

Radiography. This is used for detecting internal defects in, e.g., pipe walls. A radiation source is placed inside the pipe and film is wrapped around the outside. Radiography is normally only used during manufacture or construction because of access and safety issues. It is not suitable for detecting planar defects such as cracks.

Fluorescent die penetration. This is used for detecting surface cracking. This technique is particularly useful in situations where direct access is limited but where a fluorescent liquid can be poured and the surface subsequently examined remotely using fiber optics.

Answer 2

Answer:

Strain meter rosette, Radiography, Fluorescent die penetration, and Vibrating Wire Crack Meter are some of the instruments used for measuring internal deformation and cracking​.

Explanation:

Radiography.

Radiography is used for detecting internal defects in, e.g., pipe walls. A radiation source is placed inside a pipe and film is wrapped around the outside. Radiography is normally only used during manufacture or construction because of access and safety issues. It is not suitable for detecting planar defects such as cracks.

Fluorescent die penetration.

Fluorescent die penetration is used for detecting surface cracking. This technique is particularly useful in situations where direct access is limited but where a fluorescent liquid can be poured and the surface subsequently examined remotely using fiber optics.

Strain meter rosette

Keep a check on the all the deformation caused due to different reasons

Vibrating Wire Crack Meter

The Vibrating Wire Crack Meter is used to measure movement across surface cracks, and joints in concrete, rock, soil, and structures. They consist of a sensor outer body tube and an inner free sliding rod which is connected at the internal end to a vibrating wire sensor by a spring.