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Machine Design

Machine Design
Taper usually provided on cotter is

1 in 24
1 in 5
1 in 10
1 in 40

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Machine Design
Rankine's theory is used for

Plastic materials
Brittle materials
Elastic materials
Ductile materials

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Machine Design
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

45 to 60%
80 to 90%
70 to 83%
63 to 70%

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Machine Design
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

T₁ + T₂ + Tc
(T₁ - T₂ + Tc)/2
T₁ - T₂ + Tc
(T₁ + T₂ + Tc)/2

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Machine Design
The ball bearings are, usually, made from

High speed steel
Low carbon steel
High carbon steel
Medium carbon steel

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Machine Design
Which of the following screw thread is used for power transmission in one direction only?

Multiple threads
Square threads
Acme threads
Buttress threads

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