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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
A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of

3.0 mm
2 mm
2.22 mm
2.50 mm

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Theory of Machine
When a point at the end of a link moves with constant angular velocity, its acceleration will have

Coriolis component only
Radial and tangential components both
Radial component only
Tangential component only

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Theory of Machine
If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be

Same
Data are insufficient to determine same
More
Less

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Theory of Machine
The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m).(dx/dt) + (s/m).x = 0, if the roots of the equation are __________ then the system will be under damped.

Equal
None of these
Complex conjugate
Real

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Theory of Machine
When a ship travels in a sea, which of the effect is more dangerous

Steering
Pitching
All of these
Rolling

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