If a close coiled helical spring absorbs 30 N-mm of energy while extending by 5 mm, its stiffness will be ______.

The work done against friction is reduced due to _________

The intensity of shear stress at a section is __ to the distance of the section from the axis of the shaft.

</p><p>Pure torsion of a shaft produces:</p> <p></p>

</p><p>Pick up the incorrect statement from the following:</p> The torsional resistance of a shaft is …

The small projections of plaster are known as ____

Skimming float is ________

Torque per unit twist of a shaft is known as</p>

Torsional sectional modulus is also known as _____