half the angle between two inclined faces in axial plane

the angle between the tangent to the pitch helix and the plane of rotation

the angle between the tangent to the pitch helix and an element of the cylinder

none of the above

axial load plus stress due to bending

acceleration/retardation of masses plus stress due to bending

axial load plus stress due to acceleration/retardation

bending plus stress due to acceleration/retardation

short bearing

long bearing

medium bearing

square bearing

strong in buckling about X-axis

strong in buckling about Y-axis

equally strong in buckling about X-axis and Y-axis

any one of the above

45 to 60%

63 to 70%

70 to 83%

80 to 90%