Gun metal is an alloy of

Which of the following alloy steels is the most suitable for making gun barrels and projectiles?

A

Tungsten steel

B

Molybdenum steel

C

Nickel-chrome steel

D

Cobalt steel

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

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

Admiralty gun metal contains

A

63 to 67% nickel and 30% copper

B

88% copper, 10% tin and rest zinc

C

Alloy of tin, lead and cadmium

D

Iron scrap and zinc

Which of the following are the ingredients of gun metal?

A

Iron, Zinc and Titanium

B

Iron and Tin

C

Iron, Brass and Tin

D

Copper, Tin and Zinc

Gun metal contains

A

70% copper and 30% zinc

B

90% copper and 10% tin

C

85 - 92% copper and rest tin with little lead and nickel

D

70 - 78% copper and rest tin

By increasing impurity content in the metal alloy the residual resistivity always

A

Decreases

B

Increases

C

Remains constant

D

Becomes temperature independent

A metallic alloy in which one of the constituent metal is __________ , is called an amalgam.

A

Zinc

B

Mercury

C

Lead

D

Tin

Solder metal is an alloy of

A

Lead and tin

B

Lead and antimony

C

Copper and zinc

D

Copper and tin

Gun metal is an alloy of

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