Aux 1 Unit 11 Q9

1 / 10

What design feature in roller-type bearings allows for the accommodation of angular misalignment in the shaft?

A) Fixed, non-adjustable rollers

B) Spherical or self-aligning roller bearings that can tilt to adjust for misalignment

C) Rigid coupling between the rollers and the shaft

D) A non-rotating roller design

2 / 10

How does the design of the roller bearing's raceways contribute to handling angular misalignment?

A) By being perfectly flat

B) By being slightly curved or crowned to allow the rollers to adjust to angular changes without excessive stress

C) By being completely rigid

D) By being larger in diameter

3 / 10

Which type of roller bearing is specifically designed to accommodate angular misalignment in a propulsion system?

A) Cylindrical roller bearing

B) Tapered roller bearing

C) Spherical roller bearing

D) Needle roller bearing

4 / 10

What is the primary advantage of using spherical roller bearings in accommodating angular misalignment?

A) They are more rigid than other bearings.

B) They provide high tolerance for misalignment while still supporting heavy loads.

C) They are less expensive to manufacture.

D) They require no lubrication.

5 / 10

If angular misalignment is not properly accommodated in a roller bearing, what is the likely consequence?

A) Improved bearing performance

B) Increased wear on the bearing and potential premature failure

C) Decreased friction within the bearing

D) Enhanced shaft flexibility

6 / 10

How is longitudinal movement of the shaft typically accommodated in a roller-type bearing?

A) By using a fixed bearing that restricts all movement

B) By incorporating a floating bearing design that allows the shaft to move axially within the bearing

C) By applying additional pressure to the bearing

D) By using a rigid coupling

7 / 10

What feature in a roller bearing allows for axial (longitudinal) movement of the shaft?

A) The bearing's fixed raceways

B) The use of a special floating or expansion bearing that permits axial movement

C) Increased friction within the bearing

D) The use of non-rotating rollers

8 / 10

What is the primary reason for allowing longitudinal movement of the shaft within its bearings?

A) To reduce the speed of the vessel

B) To accommodate thermal expansion and contraction, preventing excessive stress on the shaft and bearings

C) To increase the weight of the shaft

D) To improve the rigidity of the bearing system

9 / 10

How does a floating bearing differ from a fixed bearing in terms of accommodating shaft movement?

A) A floating bearing restricts all movement.

B) A floating bearing allows axial movement, while a fixed bearing does not.

C) A floating bearing increases the shaft's rigidity.

D) A floating bearing decreases the shaft's rotational speed.

10 / 10

What could be a potential consequence if the shaft's longitudinal movement is not properly accommodated in a roller bearing system?

A) Increased bearing performance

B) Increased stress on the shaft and bearings, leading to potential failure

C) Reduced need for lubrication

D) Improved shaft alignment

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