Babbit metal used for bearings is a____base alloy.

Babbit metal (used for making bearings) comprises of

A

Mainly tin (85%) and lead

B

Saw dust and iron dust mixture

C

Zinc and aluminium

D

Copper and aluminium

Babbit metal used for making bearings should have

A

High co-efficient of friction between journal and bearing

B

Ability to retain lubricant on its surface

C

Low co-efficient of friction between journal and bearing

D

Both B & C

Babbit lining is used on brass/bronze bearings to increase the

A

Antifriction properties

B

Compressive strength

C

Bearing resistance

D

Wear resistance

Babbit metals used for making bearings are

A

Tin or lead based alloys

B

Short of antifrictional properties

C

Having homogenous microstructure

D

Yellow metals

Babbit metal is not a

A

Tin base alloy

B

White metal

C

Lead base alloy

D

Pure metal

What type of bearing is used for main bearings and connecting rod bearings?

A

Ball bearings

B

Plain bearings

C

Needle roller bearing

D

Taper roller bearing

The rolling contact bearings as compared to sliding contact bearings have

A

Low starting and low running friction except at very high speeds

B

Accuracy of shaft alignment

C

Small overall dimensions

D

All of the above

Constantan an alloy used in thermocouples is an alloy of

A

Copper and tin

B

Copper and zinc

C

Copper and iron

D

Copper and nickel

Perminvar alloy having constant permeability is an alloy of

A

Nickel, copper and iron

B

Nickel, copper and zinc

C

Copper, nickel and antimony

D

Iron, zinc and bismuth

The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

A

Less than

B

Equal to

C

More than

D

Either B or C; depends on the type of alloy

Babbit metal used for bearings is a____base alloy.

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