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Theory of Machine

Theory of Machine
The relative velocity of B with respect to A in a rigid link AB is

Parallel to AB
At 45° to AB
Perpendicular to AB
Along AB

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Theory of Machine
Carnot cycle is

a reversible cycle
a quasi static cycle
an irreversible cycle
a semi-reversible cycle

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Theory of Machine
In its simplest form, a cam mechanism consists of following number of links

2
1
3
4

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Theory of Machine
In railway axle boxes, the bearing used is

Double row spherical roller bearing
Cylindrical roller bearing
Double row self aligning ball bearing
Deep groove ball bearing

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Theory of Machine
The magnitude of linear velocity of a point B on a link AB relative to point A is, (Where ω = Angular velocity of the link AB)

ω² × AB
ω × (AB)²
ω × AB
(ω × AB)²

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Theory of Machine
The advantage of the piston valve over the slide valve is that in the former case

Wear is less
The pressure developed being high provides tight sealing
Both wear and power absorbed are low
Power absorbed is less

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