24. A 3/8 in wire rope is made of plow steel having a tensile strength of 240 ksi. For it to have an infinite life, the pressure strength ratio should be 1.4 x 10-³. If the allowable fatigue tension for the rope is 800 lb, determine the minimum diameter of the sheave in inches. a. 12 14 b. 13 15 C. d.

Elements Of Electromagnetics
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24. A 3/8 in wire rope is made of plow steel having a tensile strength of 240 ksi. For it to have an infinite life,
the pressure strength ratio should be 1.4 x 10-³. If the allowable fatigue tension for the rope is 800 lb,
determine the minimum diameter of the sheave in inches.
14
15
a. 12
b. 13
26. Determine the torque required to accelerate a load that has an inertia of 80 lb-ft² from 0 to 600 rpm in 5
seconds.
a. 18.4
b. 31.2
C.
d.
a. spacers
b. shoulders
C.
d.
28. Which is the least reliable in holding a key in its position?
C. set screw
d. retaining rings
a.
4.59
b. 6.12
40.1
Answer is not among the choices
29. A worm gear has 32 teeth and Pd = 6. It mates with a worm rotating 16 times as fast. If the worm diameter
is 2.2 inch, determine its lead angle in degrees.
c. 7.24
d.
8.62
[
Transcribed Image Text:24. A 3/8 in wire rope is made of plow steel having a tensile strength of 240 ksi. For it to have an infinite life, the pressure strength ratio should be 1.4 x 10-³. If the allowable fatigue tension for the rope is 800 lb, determine the minimum diameter of the sheave in inches. 14 15 a. 12 b. 13 26. Determine the torque required to accelerate a load that has an inertia of 80 lb-ft² from 0 to 600 rpm in 5 seconds. a. 18.4 b. 31.2 C. d. a. spacers b. shoulders C. d. 28. Which is the least reliable in holding a key in its position? C. set screw d. retaining rings a. 4.59 b. 6.12 40.1 Answer is not among the choices 29. A worm gear has 32 teeth and Pd = 6. It mates with a worm rotating 16 times as fast. If the worm diameter is 2.2 inch, determine its lead angle in degrees. c. 7.24 d. 8.62 [
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