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4

The aluminium alloy, mainly used, for anodized utensil manufacture, is

A. Duralumin

B. Y-alloy

C. Magnalium

D. Hindalium

Correct Answer :

D. Hindalium


Related Questions

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4

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

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4

Delta metal is an alloy of

A. Copper, zinc and iron

B. Iron, nickel and copper

C. Iron, lead and tin

D. Iron, aluminium and magnesium

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4

The maximum internal diameter of a blast furnace is about

A. 3 m

B. 6 m

C. 9 m

D. 12 m

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4

A material is said to be allotropic, if it has

A. Fixed structure at all temperatures

B. Atoms distributed in random pattern

C. Different crystal structures at different temperatures

D. Any one of the above

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4

The crystal of alpha iron is

A. Body centered cubic

B. Face centered cubic

C. Hexagonal close packed

D. Cubic structure

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4

Eutectoid steel contains following percentage of carbon

A. 0.02 %

B. 0.3 %

C. 0.63 %

D. 0.8 %

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4

Compressive strength of grey cast iron in tonnes/cm is of the order of

A. 35

B. 57

C. 710

D. 1015

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4

In malleable iron, carbon is present in the form of

A. Cementite

B. Free carbon

C. Flakes

D. Nodular aggregates of graphite

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4

Delta-iron occurs between the temperature ranges of

A. 400°C to 600°C

B. 600°C to 900°C

C. 900°C to 1400°C

D. 1400°C to 1530°C

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4

Recrystallisation temperature is one

A. At which crystals first start forming from molten metal when it is cooled

B. At which new spherical crystals first begin to form from the old deformed one when a strained metal is heated

C. At which change of allotropic form takes place

D. At which crystals grow bigger in size

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4

German silver is an alloy of

A. Silver and some impurities

B. Refined silver

C. Nickel, Copper and zinc

D. Nickel and copper

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4

German silver contains

A. 1% silver

B. 2% silver

C. 5% silver

D. No silver

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4

Heavy duty leaf and coil springs contain carbon of the following order

A. 0.2 %

B. 0.5 %

C. 0.8 %

D. 1.0 %

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4

In mottled cast iron, carbon is available in

A. Free form

B. Combined form

C. Nodular form

D. Partly in free and partly in combined state

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4

The coordination number of a face centred cubic space lattice is

A. Six

B. Twelve

C. Eighteen

D. Twenty

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4

Which of the following statement is incorrect about duralumin?

A. It is prone to age hardening

B. It can be forged

C. It has good machining properties

D. It is lighter than pure aluminium

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4

Solder is an alloy consisting of

A. Tin, antimony, copper

B. Tin and copper

C. Tin and lead

D. Lead and zinc

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4

Muntz metal contains copper and zinc in the ratio of

A. 50 : 50

B. 40 : 60

C. 60 : 40

D. 20 : 80

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4

Which of the following metal is used for nuclear energy?

A. Uranium

B. Thorium

C. Niobium

D. All of these

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4

Bronze is an alloy of

A. Copper and zinc

B. Copper and tin

C. Copper, tin and zinc

D. None of these

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4

The portion of the blast furnace below its widest cross-section is called

A. Hearth

B. Stack

C. Bosh

D. Throat

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4

Large forgings, crank shafts, axles normally contain carbon up to

A. 0.05 to 0.20 %

B. 0.20 to 0.45 %

C. 0.45 to 0.55 %

D. 0.55 to 1.0 %

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4

The correct composition of Babbitt metal is

A. 87.75% Sn, 4% Cu, 8% Sb, 0.25% Bi

B. 90% Sn, 2% Cu, 4% Sb, 2% Bi, 2% Mg

C. 87% Sn, 4% Cu, 8% Sb, 1% Al

D. 82% Sn, 4% Cu, 8% Sb, 3% Al, 3% Mg

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4

Babbitt metal is a

A. Lead base alloy

B. Tin base alloy

C. Copper base alloy

D. Both (A) and (C) above

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4

Which is false statement about properties of aluminium?

A. Modulus of elasticity is fairly low

B. Wear resistance is very good

C. Fatigue strength is not high

D. Creep strength limits its use to fairly low temperatures

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4

The ability of a material to resist softening at high temperature is known as

A. Creep

B. Hot tempering

C. Hot hardness

D. Fatigue

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4

High carbon steel carries carbon percentage

A. 0.1 to 0.3 %

B. 0.3 to 0.6 %

C. 0.6 to 0.8 %

D. 0.8 to 1.5 %

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4

Pure iron is the structure of

A. Ferrite

B. Pearlite

C. Austenite

D. Ferrite and cementite

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4

Silicon when added to copper improves

A. Machinability

B. Hardness

C. Hardness and strength

D. Strength and ductility

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4

Malleability of a material can be defined as

A. Ability to undergo large permanent deformations in compression

B. Ability to recover its original form

C. Ability to undergo large permanent deformations in tension

D. All of the above