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Machine Design

Machine Design
A steel containing _________ 0.8% carbon is known as hypo-eutectoid steel.

Equal to
None of these
Less than
Greater than

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Machine Design
For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

4μ sinθ/(θ + sinθ)
μ sinθ/(2θ + sin 2θ)
4μ sinθ/(2θ + sin 2θ)
2μ sinθ/(θ + sinθ)

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Machine Design
In helical bevel gearing, the axes of shafts are __________ and the teeth are curved.

Intersecting and non-parallel
Non-intersecting and non-parallel
None of these
Intersecting

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Machine Design
The bending stress in a curved beam is

Zero at the centroidal axis
Maximum at the neutral axis
Zero at the point other than centroidal axis
None of these

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Machine Design
18/8 steel contains

18% chromium and 8% nickel
18% nickel and 8% chromium
18% nickel and 8% vanadium
18% vanadium and 8% nickel

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Machine Design
If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as

T sec³φ
T sec²φ
T cosecφ
T/sec³φ

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