The coating of a thin layer of zinc on steel or iron objects is known as

Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is

A

Reduced preferentially

B

Cheaper

C

Oxidised preferentially

D

Lighter

If 2 kg of metal, of which 1/3 is zinc and the rest is copper s, be mixed with 3 kg of metal , of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?

A

13 : 42

B

19 : 43

C

15 : 42

D

17 : 43

Coating of zinc over steel is known as

A

Cladding

B

Galvanising

C

Anodising

D

Passivation

Iron is prevented from rusting by coating with zinc. This process is called as

A

Galvanisation

B

Corrosion

C

Sublimation

D

Reduction

Galvanising (i.e., zinc coating) of steel sheets is done to

A

Prevent its rusting by contact with corrosive atmosphere

B

Protect the base metal by cathodic protection

C

Both A & B

D

Neither A nor B

The process of coating steel sheets by zinc to improve its corrosion resistance is called

A

Calorising

B

Galvanising

C

Zincification

D

Tempering

Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.

A

3, 3, 1, 7

B

3, 2, 1, none

C

3, 2, 1, 7

D

3, 3, 2, none

E

All of the above

Galvanised iron is made by coating iron with

A

Zinc

B

Nickel

C

Chromium

D

Sulphur

If you need 98 ounces of iron and 2 ounces of carbon to make a sheet of steel. How much iron you need in ounces to make 12 sheet steel?

A

98

B

50

C

49

D

198

The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :

A

Zinc plating

B

Alloy formation

C

Vulcanization

D

Galvanization

The coating of a thin layer of zinc on steel or iron objects is known as

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