In a full journal bearing, the angle of contact of the bearing with the journal is

Consider the following statements: In case of helical gears, teeth are cut at an angle to the axis of rotation of the gears. 1) Helix angle introduces another ratio called axial contact ratio. 2) Transverse contact ratio is equal to axial contact ratio in helical gears. 3) Large transverse contact ratio does not allow multiple teeth to share the load. 4) Large axial contact ratio will cause larger axial force component Which of the above statements are correct?

A

1 and 2

B

2 and 3

C

1 and 4

D

3 and 4

In a partial journal bearing, the angle of contact of the bearing with the journal is

A

120°

B

180°

C

270°

D

360°

In the following sentence, a part of the sentence is underlined. Below are given alternatives to the underlined part, which may improve the sentence. Choose the correct alternative in case no improvement is needed, choose the alternative that indicates ''No Improvement.'' Here are the journal article for the assignment. A. is the journal article B. is the journal articles C. these are the journal article

A

Only A

B

Only C

C

Only B

D

Both B and C

In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

A

Remains constant at all speeds

B

Is minimum at zero speed and increases monotonically with increase in speed

C

Is maximum at zero speed and decreases monotonically with increase in speed

D

Becomes minimum at an optimum speed and then increases with further increase in speed

In a journal bearing, the load on the bearing is __________ to the axis of the journal.

A

Parallel

B

Perpendicular

C

Both A and B

D

None of these

Statement (I): The journal while rotating inside a bearing automatically shifts its centre to one side and thus the journal is eccentric inside the bearing. Statement (II): The wedge shape of oil film gives rise to thin-film lubrication, which is considered as stable lubrication.

A

Both Statement (I) and Statement (II) are individually true, and Statement (II) is the correct explanation of Statement (I)

B

Both Statement (I) and Statement (II) are individually true, but Statement (II) is NOT the correct explanation of Statement (I)

C

Statement (I) is true, but Statement (II) is false

D

Statement (I) is false, but Statement (II) is true

Journal bearing works satisfactorily with L/D ratio in the range of: [where, L = Length of bearing, D = Diameter of journal]

A

1 - 2

B

10 - 20

C

0.1 – 0.2

D

0.01 – 0.1

Angle ‘A’ of a cyclic quadrilateral ABCD is 53° less then angle B. Angle B is twice of angle C and angle C is 40° more than angle D. What would be the measure of angle A?

A

100.57°

B

102.33°

C

115.87°

D

110.44°

One end of the ladder is in contact with a wall and the other end is in contact with level ground making an angle of 40° when the foot of the ladder is moved through a distance ‘x’ m away from the wall, the end in contact with wall sides ‘3m’ along the wall and the angle made by the ladder with the level is, now 20°. Then, find the value of x?

A

3 m

B

2√3 m

C

4 m

D

3√3 m

A journal bearing is a ______ contact bearing working on the hydrodynamic lubrication and which supports load in____ direction.

A

Sliding, Axial

B

Rolling, Radial

C

Sliding, Radial

D

Rolling, Axial

In a full journal bearing, the angle of contact of the bearing with the journal is

Related Questions