10. The design life of a bearing used in a shaft of an industrial blower is around 20,000 h. How many number of revolutions is this equal to if the shaft rotates at 600 rpm? 3 x 108 6 x 108 4 x 108 7 x 108 a. b. 11. For a D/d ratio of 1.5, which combination of fillet radius and smaller shaft diameter will you consider it as a well rounded fillet? a. 0.4 and 20.0 b. 2 and 10.5 C. d. a. b. 12. Which combination of sheave diameters and center of less than 9.5 inches? 2, 8, 10 2.5, 10, 10 C. d. 3.0 and 100 both b and c distance results in a length of span between two sheaves C. 4, 10, 10 d. Answer is not among the choices

10. The design life of a bearing used in a shaft of an industrial blower is around 20,000 h. How many number of revolutions is this equal to if the shaft rotates at 600 rpm? 3 x 108 6 x 108 4 x 108 7 x 108 a. b. 11. For a D/d ratio of 1.5, which combination of fillet radius and smaller shaft diameter will you consider it as a well rounded fillet? a. 0.4 and 20.0 b. 2 and 10.5 C. d. a. b. 12. Which combination of sheave diameters and center of less than 9.5 inches? 2, 8, 10 2.5, 10, 10 C. d. 3.0 and 100 both b and c distance results in a length of span between two sheaves C. 4, 10, 10 d. Answer is not among the choices

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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Concept explainers

Design of Shafts and Shaft Components

The shaft is basically defined as the machine element that rotates, is in circular cross-section, it is majorly used to transfer the power from one part of the system to another, or from a power generating machine to a power absorbing machine. The shaft is supported on bearings and is rotated with the help of a set of gears or pulleys that are used for the power transmission. Bending moment, torsion, and an axial force act upon the shaft. Designing of shaft primarily involves determining stresses at a critical point in the shaft that is arising due to loading.

Question

10. The design life of a bearing used in a shaft of an industrial blower is around 20,000 h. How many number of
revolutions is this equal to if the shaft rotates at 600 rpm?
3 x 108
6 x 108
4 x 108
7 x 108
a.
b.
11. For a D/d ratio of 1.5, which combination of fillet radius and smaller shaft diameter will you consider it as a
well rounded fillet?
0.4 and 20.0
b. 2 and 10.5
a.
b.
C.
d.
12. Which combination of sheave diameters and center
of less than 9.5 inches?
2, 8, 10
2.5, 10, 10
C.
d.
c.
d.
3.0 and 100
both b and c
distance results in a length of span between two sheaves
4, 10, 10
Answer is not among the choices

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