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Machine Design

Machine Design
In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

21
17
15
25

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Machine Design
In the levers of __________ type, the mechanical advantage is less than one.

None of these
Second
Third
First

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Machine Design
A hot short metal is

Brittle under all conditions
Brittle when cold
Ductile at high temperature
Brittle when hot

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Machine Design
A spring is used to

Store energy
Measure forces
Apply forces
All of these

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Machine Design
The connecting rod bolts are tightened up so that tightening stress

Is 50% of yield point
Is about yield point divided by safety factor
Is just sufficient to hold parts together
Approaches yield point

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Machine Design
Which of the following cotter joint will be used to connect strap end of a connecting rod?

Gib and cotter joint
Spigot and socket cotter joint
Sleeve and cotter joint
Any one of these

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