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Machine Design

Machine Design
The product of the diametral pitch and circular pitch is equal to

1/π
π
π × number of teeth
1

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Machine Design
For steel, the ultimate strength in shear as compared to ultimate strength in tension is

43832
43834
43833
43864

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Machine Design
Which of the following statement is correct, for two shafts connected in parallel?

Angle of twist of each shaft is the same
Torque in each shaft is the same
Shear stress in each shaft is the same
Torsional stiffness of each shaft is the same

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Machine Design
A screw is specified by its

Pitch
Major diameter
Pitch diameter
Minor diameter

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Machine Design
In the assembly of pulley, key and shaft

Pulley is made the weakest
Key is made the strongest
Key is made the weakest
All the three are designed for equal strength

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Machine Design
If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given by

p/ZN
ZN/p
Z/pN
N/Zp

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