The lorsional rigidity of a shaft is expressed by the Maximum torque it can transmit Elastic limit up to which it resists torsion, shear and bending stresses Number of cycles it undergoes before failure Torque required to produce a twist of one radian per unit length of shaft 2- The value of shear stress which is induced in the shaft due to the applied couple varies From maximum at the center te zero at the circumference From zero at the center to maximum at the circumference From maximum at the center to minimum at the circumference From minimum at the center to maximum at the circumference 3- A circular shaft fixed at, A has diameter D for half of its length and diameter D/2 over the other half, as shown in the below figure. If the rotation of B relative to A is 0.1 radian, the rotation of Crelative to B will be 4/2 12 114 (T and Care same in both cases) 0.4 radian 0.8 radian 1.6 radian 3.2 radian 4- For steel, the ultimate strength in shear as compared to in tension is nearly Same Half One third Two third 5- A hollow shaft of same cross-section area as compared to a solid shaft transmit Same torque Less torque More torque Unpredictable

The lorsional rigidity of a shaft is expressed by the Maximum torque it can transmit Elastic limit up to which it resists torsion, shear and bending stresses Number of cycles it undergoes before failure Torque required to produce a twist of one radian per unit length of shaft 2- The value of shear stress which is induced in the shaft due to the applied couple varies From maximum at the center te zero at the circumference From zero at the center to maximum at the circumference From maximum at the center to minimum at the circumference From minimum at the center to maximum at the circumference 3- A circular shaft fixed at, A has diameter D for half of its length and diameter D/2 over the other half, as shown in the below figure. If the rotation of B relative to A is 0.1 radian, the rotation of Crelative to B will be 4/2 12 114 (T and Care same in both cases) 0.4 radian 0.8 radian 1.6 radian 3.2 radian 4- For steel, the ultimate strength in shear as compared to in tension is nearly Same Half One third Two third 5- A hollow shaft of same cross-section area as compared to a solid shaft transmit Same torque Less torque More torque Unpredictable

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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1. A cold drawn mild steel, AISI 1018CD is used to fabricate the hollow shaft as shown in Figure Q1. Torque of 15 Nm and 30 Nm are exerted at B and C, respectively. The outer diameter of the shaft is D = 20 mm and the inner diameter is d = 15 mm. If the modulus of rigidity for the steel used is given as G = 78 GPa, determine: a) the maximum and minimum shear stresses at sections a-a and b-b. b) the angle of twist at end C. 0.3 m A a; B 15 Nm 0.8 m b. b: Figure Q1 с D 30 Nm
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