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Machine Design

Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

2.5 d
1.2 d
1.6 d
2 d

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Machine Design
A bolt is designed on the basis of __________ with a large factor of safety.

Direct tensile stress
Direct bending stress
Direct compressive stress
Direct shear stress

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Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Flared
Honed
Crimped
Bent

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Machine Design
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

Completely reversed load
Static load
Dynamic load
Static as well as dynamic load

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be

(6V/ π)3
(6V/ π)1/3
(6V/ π)2
(6V/ π)1/2

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

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

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