Tech a Says That Torque-To-Yield Head Bolts Are Tightened To

question 19

Multiple Choice

Tech A says that torque-to-yield head bolts are tightened to, or just past, their yield point. Tech B says that the yield point is the torque at which the bolt breaks. Who is correct?

• A) Tech A
• B) Tech B
• C) Both A and B
• D) Neither A nor B

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Definitions:

Compression

The process of reducing the volume of a material by applying pressure, or in geology, the stress state in which rock is pressed together, increasing its density.

Tension

A force that stretches material or causes it to be pulled apart.

Columnar Joints

Vertically oriented, hexagonal columns of rock that form as a result of the cooling and contraction of volcanic or igneous rocks.

Internal Strain

The deformation within a material or body due to applied stress or pressure.