Machine Design (2171909) MCQs

MCQs of Journal Bearings

Showing 21 to 30 out of 81 Questions
21.

In steam and gas turbines, rolling contact bearings are used.

(a)

True

(b)

False

Answer:

Option (b)

22.

For crank shaft bearings, the ratio of the length of the journal to its diameter is less than unity.

(a)

Correct

(b)

Incorrect

Answer:

Option (a)

23.

Which following is (are) the example(s) of Plain bearing(s)?

(a)

Thrust bearing

(b)

Linear bearing

(c)

Journal bearing

(d)

All of the mentioned

Answer:

Option (d)

24.

Which following type(s) of bearing(s) have no rolling element?

(a)

Thrust journal bearing

(b)

Linear bearing

(c)

Journal bearing

(d)

All of the mentioned

Answer:

Option (d)

25.

When the shaft rotates in anticlockwise direction at high speed in a bearing, it will

(a)

have a contact at the bottom most of the bearing

(b)

move towards the right of the bearing making metal to metal contact

(c)

move towards the right of the bearing making no metal to metal contact

(d)

move towards left of the bearing making metal to metal contact

Answer:

Option (c)

26.

A sliding bearing in which the working surfaces are completely separated from each other by lubricant is called zero film bearing.

(a)

True 

(b)

False

Answer:

Option (b)

27.

The lubrication in which a load of bearing is carried solely by a film of fluid and there is no contact between the two bearings surface is called

(a)

full film condition

(b)

boundary condition

(c)

dry condition

(d)

wet condition

Answer:

Option (a)

28.

The lubrication in which a load of bearing is carried partly by a film of fluid and partly by direct surface contact is called

(a)

full film condition

(b)

boundary condition

(c)

dry condition

(d)

wet condition

Answer:

Option (b)

29.

In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.

(a)

thick film

(b)

thin film

Answer:

Option (b)

30.

When a load of bearing is carried by direct surface to surface contact is called

(a)

full film condition

(b)

boundary condition

(c)

dry condition

(d)

wet condition

Answer:

Option (c)

Showing 21 to 30 out of 81 Questions