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Machine Design

Machine Design
The material commonly used for machine tool bodies is

Aluminium
Mild steel
Brass
Cast iron

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Machine Design
I.S. specifies following total number of grades of tolerances

16
20
18
22

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Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

30 kN/m
12 kN/m
24 kN/m
6 kN/m

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Machine Design
Which of the following has threads at both ends?

Stud
None of these
Bolt
Tap bolt

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Machine Design
The material generally used for aircraft components is

Aluminium
High speed steel
Stainless steel
Mild steel

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Machine Design
For low and moderate speed engines, the cam follower should move with

Cycloidal motion
Uniform acceleration and retardation
Simple harmonic motion
Uniform velocity

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