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MACHINE DESIGN

Machine Design
The value of Lewis form factor used in design of gears is

Dependent on number of teeth of a gear
Dependent on system of teeth
All of these
Independent of size of teeth

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Machine Design
The design of the pressure vessel is based on

Longitudinal stress
Longitudinal and hoop stress
Hoop stress
None of these

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Machine Design
The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called

Fluctuating stress
Repeated stress
Alternating stress
Yield stress

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Machine Design
For crank shaft bearings, the ratio of the length of the journal to its diameter is_________.

Equal to 1
Less than unity
Greater than unity
None of these

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Machine Design
If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as

T sec³φ
T/sec³φ
T cosecφ
T sec²φ

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