For any shaft the number of critical speed is

Related MCQs

• Two shafts of the same material are subjected to the same torque. If the first shaft is of solid circular section and the second shaft is of hollow section whose internal diameter is 2/3 of the outside diameter, the ratio of weights of hollow shaft to solid shaft would be
• Two shafts 'A' and 'B' transmit the same power. The speed of shaft 'A' is 250 r.p.m. and that of shaft 'B' is 300 r.p.m. The shaft 'B' has the greater diameter.
• Two shafts 'A' and 'B' have the same material. The shaft 'A' is solid of diameter 100 mm. The shaft 'B' is hollow with outer diameter 100 mm and inner diameter 50 mm. The torque transmitted by shaft 'B' is
• The product of the tangential force acting on the shaft and its distance from the axis of the shaft (i.e. radius of shaft) is known as
• Two shafts 'A' and 'B' are made of same material. The shaft 'A' is solid and has diameter D. The shaft 'B' is hollow with outer diameter D and inner diameter D / 2. The strength of hollow shaft in torsion is
• Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D / 2. The strength of shaft 'B' is
• Two solid shafts 'A' and 'B' are made of the same material. The shaft 'A' is of 50 mm diameter and shaft 'B' is of 100 mm diameter. The strength of shaft 'B' is
• A solid circular shaft of diameter D carries are axial load W. If the same load is applied axially on a hollow circular shaft of inner diameter D/2, the ratio of stress in a solid shaft to a hallow one is
• When a shaft is subjected to a twisting moment, every cross-section of the shaft will be under
• The strength of the shaft is judged by the torque transmitted by the shaft.