Yes

No

Unknown

None

the system is unbalanced

bearing centre line coincides with the axis

the shafts are rotating at very high speeds

resonance is caused due to the heavy mass of the rotor

Oldham's coupling

Elliptical trammel

Scotch yoke mechanism

all of these

varies in magnitude but constant in direction

varies in direction but constant in magnitude

varies in magnitude and direction both

constant in magnitude and direction both

four times the first one

same as the first one

one fourth of the first one

one and a half times the first one