Machine Design (2171909) MCQs

MCQs of Journal Bearings

Showing 71 to 80 out of 81 Questions
71.

Babbitt is used

(a)

usually to make integral bearings

(b)

not to damage the journal bearing during direct contact

(c)

to collect any contaminants in the lubrication

(d)

all of the mentioned

Answer:

Option (d)

72.

Babbitt most widely used bearing materials are

(a)

tin-based

(b)

lead-based

(c)

tin-based and lead-based

(d)

neither tin based nor lead based

Answer:

Option (c)

73.

Copper – lead bearings are used in heavy-duty applications at high temperatures.

(a)

True

(b)

False

Answer:

Option (a)

74.

The metal suitable for bearings subjected to light loads is

(a)

silicon bronze

(b)

white metal

(c)

monel metal

(d)

phosphor bronze

Answer:

Option (d)

75.

The property of a bearing material which has the ability to accommodate small particles of dust, grit, etc. without scoring the material of the journal, is called

(a)

bondability

(b)

embeddability

(c)

comformability

(d)

fatigue strength

Answer:

Option (b)

76.

Teflon is used for bearings because of

(a)

low coefficient of friction

(b)

better heat dissipation

(c)

smaller space consideration

(d)

high fatigue strength

Answer:

Option (a)

77.

Rubber is used as bearing material in marine applications.

(a)

Correct

(b)

Incorrect

Answer:

Option (a)

78.

_______ is in the form of scratches in the direction of motion often with embedded particles.

(a)

Wiping of bearing surface

(b)

Abrasive wear

(c)

Corrosion

(d)

Distortion

Answer:

Option (b)

79.

_____of bearing surface is caused by the chemical attack of reactive agents that are present in the lubricating oil.

(a)

Wiping of bearing surface

(b)

Abrasive wear

(c)

Corrosion

(d)

Distortion

Answer:

Option (c)

80.

Correct selections of the fit and proper assembly procedure are the remedies against which type of failure?

(a)

Wiping of bearing surface

(b)

Abrasive wear

(c)

Corrosion

(d)

Distortion

Answer:

Option (d)

Showing 71 to 80 out of 81 Questions