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Machine Design

Machine Design
The expansion joint is mostly used for pipes which carry steam at __________ pressures.

High
Medium
None of these
Low

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Machine Design
When the belt is transmitting maximum power, the belt speed should be (Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))

√(Pmax / m)
√(3m /Pmax)
√(Pmax / 3m)
√(Pmax / 2m)

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Machine Design
A self locking screw has

Hole for inserting split pin
Course threads
Coefficient of friction is greater than tangent of load angle
Fine threads

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Machine Design
The anti-friction bearings

All of these
Have low starting and low running friction at moderate speeds
Have high initial cost
Can carry both radial and thrust loads

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

Cycloidal motion
Uniform acceleration and retardation
Uniform velocity
Simple harmonic motion

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Machine Design
The material generally used for aircraft components is

Aluminium
Stainless steel
High speed steel
Mild steel

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