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Theory of Machine

Theory of Machine
The type of gears used to connect two non parallel and non intersecting shafts is

Spur gear
Bevel gear
Spiral gear
Helical gear

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Theory of Machine
The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)

cos (θ + φ) + 1/ cos (θ - φ) + 1
cos (θ - φ) + 1/ cos (θ + φ) + 1
sin (θ + φ) + 1/ cos (θ - φ) + 1
cos (θ - φ) + 1/ sin (θ + φ) + 1

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Theory of Machine
Which of the following is an inversion of Single slider crank chain?

Elliptical trammel
Oldham’s coupling
Beam engine
Rotary engine

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Theory of Machine
When one of the links of a kinematic chain is fixed, the chain is known as a

Machine
Mechanism
Inversion
Structure

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Theory of Machine
A rigid body possesses ________degrees of freedom

Six
Four
Two
One

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Theory of Machine
Klein's construction can be used when

Crank has a uniform angular velocity
Crank has uniform angular acceleration
Crank has non-uniform velocity
Crank has uniform angular velocity and angular acceleration

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