Shafts

Which property is not required for shaft materials?

• Good castability

• High shear and tensile strength

• Good machinability

• High fatigue strength

When a solid shaft is subjected to a torsion, the shear stress induced in the shaft at its center is

• average

• maximum

• zero

• minimum

The design of shafts made of brittle materials is based on

• St Venant's theory

• Rankine's theory

• Guest's theory

• VonMises theory

When a shaft is subjected to a twisting moment, every cross-section of the shaft will be under

• bending stress

• shear stress

• compressive stress

• tensile stress

The product of the tangential force acting on the shaft and its distance from the axis of the shaft (i.e. the radius of the shaft) is known as

• flexural rigidity

• torsional rigidity

• twisting moment

• bending moment

A shaft is designed on the basis of rigidity and stiffness.

• Depends on application

• Correct

• Incorrect

• Depends on material

The standard length of the shaft is

• all of these

• 5 m

• 6 m

• 7 m

In power transmission equation, P=2πNT60×1000, what does P represent?

• P is in kw and T is the maximum torque

• P is in NM/sec and T is the maximum torque

• P is in NM/sec and T is mean torque

• P is in kw and T is mean torque

A shaft revolving at ω rad/s transmits torque (T) in N-m. The power developed is

• 2πTω4500 watts

• 2πTω75 watts

• 2πTω watts

• T.ω watts

When the shaft is subjected to pure bending moment, the bending stress is given by?

• None of the listed

• 32Mπd3

• 16Mπd3

• 8Mπd3