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Machine Design

Machine Design
According to Indian standards, total numbers of fundamental deviations are

20
25
15
10

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Machine Design
Rankine Gordon formula for buckling is valid for

Short column
Short and long column
Very long column
Long column

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Machine Design
The load cup of a screw jack is made separate from the head of the spindle to

Enhance the load carrying capacity of the jack
Reduce the value of frictional torque
Prevent the rotation of load being lifted
Reduce the effort needed for lifting the working load

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Machine Design
If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited

Square
Buttress
BSW
Acme

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Machine Design
The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

7.5 kN
22.5 kN
10.6 kN
15 kN

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Machine Design
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,

Hollow key
Soft key
None of these
Hollow saddle key

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