Brass (alloy of copper and zinc) is an example of
Substitutional solid solution
Interstitial solid solution
Intermetallic compounds
All of the above
Correct Answer :
A. Substitutional solid solution
Related Questions
Cementite consist of
13% carbon and 87% ferrite
13% cementite and 87% ferrite
13% ferrite and 87% cementite
6.67% carbon and 93.33% iron
Railway rails are normally made of
Mild steel
Alloy steel
High carbon
Tungsten steel
Hardness of upper bainite (acicular structure) is about
RC 65
RC 48
RC 57
RC 80
Constantan an alloy used in thermocouples is an alloy of
Copper and tin
Copper and zinc
Copper and iron
Copper and nickel
Brass is an alloy of
Copper and zinc
Copper and tin
Copper, tin and zinc
None of these
Duralumin contains
3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
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
4 to 4.5% magnesium, 3 to 4% copper and rest aluminium
5 to 6% tin, 2 to 3% copper and rest aluminium
Inconel is an alloy of
Nickel, chromium and iron
Nickel, copper
Nickel, Chromium
Nickel, zinc
The percentage of carbon in cast iron varies from
0.1 to 0.5
0.5 to 1
1 to 1.7
1.7 to 4.5
White cast iron has
Carbon in the form of carbide
Low tensile strength
High compressive strength
All of these
Beryllium bronze contains
60% copper and 40% beryllium
80% copper and 20% beryllium
97.75% copper and 2.25% beryllium
99% copper and 1% beryllium
The hardness of steel depends upon the
Amount of cementite it contains
Amount of carbon it contains
Contents of alloying elements
Method of manufacture of steel
The steel widely used for motor car crankshafts is
Nickel steel
Chrome steel
Nickel-chrome steel
Silicon steel
The purpose of heat treatment is to
Relieve the stresses set up in the material after hot or cold working
Modify the structure of the material
Change grain size
Any one of these
The lower critical temperature
Decreases as the carbon content in steel increases
Increases as the carbon content in steel increases
Is same for all steels
Depends upon the rate of heating
Cartridge brass can be
Cold rolled into sheets
Drawn into wires
Formed into tube
Any one of these
Cast iron is a
Ductile material
Malleable material
Brittle material
Tough material
The hardness of steel increases if it contains
Austenite
Martensite
Pearlite
Cementite
Admiralty gun metal contains
63 to 67% nickel and 30% copper
88% copper, 10% tin and rest zinc
Alloy of tin, lead and cadmium
Iron scrap and zinc
Hardness of lower bainite (tempered martensite) is about
RC 65
RC 48
RC 57
RC 80
Quenching is not necessary when hardening is done by
Case hardening
Flame hardening
Nitriding
Any one of these
Duralumin contains
94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
92.5% aluminium, 40% copper, 2% nickel, and 1.5% Mg
10% aluminium and 90% copper
90% magnesium and 9% aluminium with some copper
White cast iron contains carbon in the form of
Free carbon
Graphite
Cementite
White carbon
Which of the following statement is true about brittle fracture?
High temperature and low strain rates favour brittle fracture
Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture
Brittle fracture is always preceded by noise
Cup and cone formation is characteristic for brittle materials
Shock resisting steels should have
Low wear resistance
Low hardness
Low tensile strength
Toughness
The cupola is used to manufacture
Pig iron
Cast iron
Wrought iron
Steel
Solder is an alloy consisting of
Tin, antimony, copper
Tin and copper
Tin and lead
Lead and zinc
Eutectoid steel contains following percentage of carbon
0.02 %
0.3 %
0.63 %
0.8 %
Balls for ball bearings are made of
Cast iron
Mild steel
Stainless steel
Carbonchrome steel
Points of arrest for iron correspond to
Stages at which allotropic forms change
Stages at which further heating does not increase temperature for some time
Stages at which properties do not change with increase in temperature
There is nothing like points of arrest
Foundry crucible is made of
Mild steel
German silver
Lead
Graphite