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

A. Free carbon

B. Graphite

C. Cementite

D. White carbon

A. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

B. 92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg

C. 90% aluminium and 90% copper

D. 90% magnesium and 9% aluminium with some copper

A. Along the lines of slag distribution

B. Perpendicular to lines of slag distribution

C. Uniform in all directions

D. None of the above

A. Low carbon steel

B. Medium carbon steel

C. High carbon steel

D. Alloy steel

A. No graphite

B. A very high percentage of graphite

C. A low percentage of graphite

D. Graphite as its basic constituent of composition

A. Line defect

B. Surface defect

C. Point defect

D. None of these

A. 0.1 to 0.3 %

B. 0.3 to 0.6 %

C. 0.6 to 0.8 %

D. 0.8 to 1.5 %

A. Decreases as the carbon content in steel increases

B. Increases as the carbon content in steel increases

C. Is same for all steels

D. Depends upon the rate of heating

A. 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium

B. 3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium

C. 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium

D. 5 to 6% tin, 2 to 3% copper and rest aluminium

A. Nickel, chromium and manganese

B. Tungsten, molybdenum and phosphorous

C. Lead, tin, aluminium

D. Zinc, sulphur, and chromium

A. Low carbon steel

B. High carbon steel

C. Medium carbon steel

D. High speed steel

A. Has a fixed structure under all conditions

B. Exists in several crystal forms at different temperatures

C. Responds to heat treatment

D. Has its atoms distributed in a random pattern

A. Austenite

B. Pearlite

C. Ferrite

D. Cementite

A. Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

B. Is also known as chilled cast iron is obtained by cooling rapidly. It is almost unmachinable

C. Is produced by annealing process. I is soft, tough and easily machined metal

D. Is produced by small additions o magnesium (or cerium) in the ladle Graphite is in nodular or spheroidal form and is well dispersed throughout the material

A. Cold rolled steel

B. Hot rolled steel

C. Forged steel

D. Cast steel

A. 0.1 to 1.2%

B. 1.5 to 2.5%

C. 2.5 to 4%

D. 4 to 4.5%

A. Machinability

B. Hardness

C. Hardness and strength

D. Strength and ductility

A. There is no change in grain size

B. The average grain size is a minimum

C. The grain size increases very rapidly

D. The grain size first increases and then decreases very rapidly

A. Aluminium, copper etc.

B. Nickel, molybdenum etc.

C. Nickel, Copper, etc.

D. All of the above

A. Magnesium alloys

B. Titanium alloys

C. Chromium alloys

D. Magnetic steel alloys

A. Creep

B. Fatigue

C. Endurance

D. Plastic deformation

A. Zinc, magnesium, cobalt, cadmium, antimony and bismuth

B. Gamma-iron, aluminium, copper, lead, silver and nickel

C. Alpha-iron, tungsten, chromium and molybdenum

D. None of the above

A. Makes the iron soft and easily machinable

B. Increases hardness and brittleness

C. Make the iron white and hard

D. Aids fusibility and fluidity

A. Equal to

B. Less than

C. More than

D. None of these

A. Greater than 7

B. Less than 7

C. Equal to 7

D. pH value has nothing to do with neutral solution

A. Promotes decarburisation

B. Provides high hot hardness

C. Forms very hard carbides and thus increases wear resistance

D. Promotes retention of austenite

A. Steel

B. Al₂O₃

C. SiO₂

D. MgO

A. Steels are heated to 500 to 700°C

B. Cooling is done slowly and steadily

C. Internal stresses are relieved

D. All of these

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

A. Nickel

B. Chromium

C. Nickel and chromium

D. Sulphur, lead and phosphorus