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

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

A metallic alloy in general as compared to their pure metal components is

A

More corrosion resistant

B

Having higher melting point

C

Having lower hardness, reactivity and fusibility

D

Having lower electrical conductivity

Which of the following metals forms an amalgam with other metals?

A

Tin

B

Mercury

C

Lead

D

Zinc

Which of the following metals form an amalgam with other metals ?

A

Lead

B

Tin

C

Zinc

D

Mercury

The metallic sheath may be made of lead or lead alloy or of aluminum.

A

Yes

B

No

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

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

When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as

A

Die casting method

B

Slush casting method

C

Permanent mould casting method

D

Centrifugal casting method

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

A

Decreases

B

Increases

C

Remains constant

D

Becomes temperature independent

Solder metal is an alloy of

A

Lead and tin

B

Lead and antimony

C

Copper and zinc

D

Copper and tin

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

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