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Tuesday, 24 February 2015

Metallurgy and Heat Treatment - Multiple Choice Questions and Answer

Metallurgy and Heat Treatment - Multiple Choice Questions and Answer Points : Metallurgy and Heat Treatment, mcqs, evaluation, objective type question and answer, multiple choice questions and answer, Introduction to Metallurgy, Natural Occurrence, Treatment of Ores, Production Process, Refractory Materials, Pre-Smelting Treatment of Ores, The Smelting Operation (Blast Furnace), Manufacture of Wrought Iron, Types of Steel, Steel Manufacturing Process, Electric Arc Furnace, Industrial Shaping of Metals, Iron Carbide Diagram, Heat Treatment Equipment, Heat Treatment and Process Introduction to Metallurgy 1. Metallurgy encompasses
(a) Extractive metallurgy
(b) Physical metallurgy
(c) Both extractive and physical metallurgy
(d) None of these

2. The substance for which the ore is mined is called
(a) Gangue
(b) Constraint
(c) Value
(d) Oxide

3. The amount of iron in the earth crust is
(a) 0.5%
(b) 50%
(c) 8.1%
(d) 5%

(4) Drum mills are
(a) Reciprocating drums
(b) Rotating drums
(c) Stationary drum
(d) Vibrating drums

(5) Jaw crushers have
(a) Both stationary jaws
(b) One moving and other stationary jawsBoth moving jaws
(c) One moving and other stationary jaws
(d) Only one jaw
Natural Occurrence 1. Uranium reserves are maximum in
(a) USA
(b) Russia
(c) Canada
(d) Chile

2. The share of mineral exploration in Pakistan is
(a) 5% of GDP
(b) 1% of GDP
(c) 1.5%GDP
(d) 0.5% of GDP

3. In Pakistan mineral investment facilitation
(a) Federal Government
(b) Provincial Govt
(c) American Mining Association
(d) Chief Inspector of Mines

4. Franklinite is very
(a) Fragile
(b) Robust
(c) Strongly magnetic
(d) None of these

5. Hematite has
(a) Rhombohydral crystals
(b) Tetrahydral crystals
(c) Does not have crystals
(d) Octalhydral crystals
Treatment of Ores (1) Concentration separates
(a) Gangue from value
(b) Value from gangue
(c) Oxides
(d) None of these

(2) Magnetic separation is used for separating
(a) Magnetic values
(b) Magnetic/Non-Magnetic values
(c) Non Magnetic values
(d) None of these

(3) In gravity separation, the value having higher specific gravity will sink more_________ than the gangue
(a) Solely
(b) Rapidly
(c) Does not sink at all
(d) Randomly

(4) Calcinations is used when the ore concentrate is a compound of
(a) Solids
(b) Gases
(c) Solids and gases
(d) None of these

(5) Flotation is the process used in
(a) Physical metallurgy
(b) Extractive metallurgy
(c) Both in physical and extractive metallurgy
(d) Not used in metallurgy
Production Process (1) Oxidation is combination between an element and
(a) Hydrogen
(b) Ozone
(c) Helium
(d) Oxygen

(2) Iron has valence of
(a) 1 and 3
(b) 2 and 3
(c) 2 and 4
(d) 3 only

(3) Most of the sulphide ores are first heated in air to convert them to
(a) Hyper sulphides
(b) Ferrites
(c) Oxides
(d) None of these

(4) Reduction is the same process
(a) Oxidization
(b) Calcination
(c) Agglomeration
(d) None of these

(5) If the chemical nature of furnaces lining is
(a) Rapid reaction take place
(b) Slow reaction take place
(c) No reaction is likely
(d) None of these
Refractory Materials (1) A good refracotory should possess the ability to
(a) Be perfectly conducting
(b) Be perfectly insolating
(c) Reflect light
(d) Fuse at conditions of usage

(2) Carbon block is a type of
(a) Acid Refractory
(b) Basic Refractory
(c) Neutral Refractory
(d) None of these

(3) Magnesite brick hearth
(a) Low productivity
(b) High productivity
(c) Un-certain
(d) None of these

(4) Refractory lining may be.
(a) Acid only
(b) Basic only
(c) Neutral only
(d) Acid and basic neutral

(5) Acid lining are
(a) Expensive
(b) Inexpensive
(c) Moderate price
(d) None of these
Pre-Smelting Treatment of Ores (1) Metal concentrate is separated by means of
(a) Gravity only
(b) Flotation only
(c) Flotation or magnetism
(d) Gravity, flotation or magnetism

(2) Sink float system uses _______ as flotation medium
(a) Acid
(b) Alcohol
(c) Water
(d) None of these

(3) Flotation method uses
(a) Acid
(b) Alcohol
(c) Water
(d) None of these

(4) Agglomeration is the process of
(a) Increasing iron content in ore
(b) Improving physical structure
(c) Magnetism
(d) None of these

(5) Over ________ binders have been evaluated so far
(a) 10
(b) 2
(c) 50
(d) 30
The Smelting Operation (Blast Furnace) 1. The iron obtained from the blast furnace is term as
(a) Cast iron
(b) Wrought iron
(c) Pig iron
(d) Nodular iron

2. Pig iron contains ____ iron
(a) 50%
(b) 65%
(c) 75%
(d) 90%

3. Pure iron __________ pig iron ore malleable iron
(a) Is harder than
(b) Has higher corrosion resistance than
(c) Melts at lower temperature than
(d) None of these

4. The active metal mixture also does _________
(a) Melting
(b) Refining
(c) Iron ore reduction
(d) De-oxidation

5. Iron barring material of blast furnace burden is
(a) Ferromanganese
(b) Sinter
(c) Coke
(d) Qutarize
Manufacture of Wrought Iron 1. Puddling process is for converting
(a) Pig iron to steel
(b) Mild steel to alloy steel
(c) Pig iron to wrought iron
(d) None of these

(2) Properties of wrought iron are determined by
(a) Carbon and Magnesium
(b) Magnesium and Manganese
(c) Aluminum and carbon content
(d) Carbon and Manganese

(3) In wrought iron Manganese is below
(a) 0.1%
(b) 0.2%
(c) 1.5%
(d) 0.06%

(4) Older puddling furnaces had
(a) Straight roof
(b) Flat roof
(c) Arched roof
(d) None of these

(5) Wrought iron can be used for
(a) Barbed wire
(b) Cans
(c) Plat
(d) None of these
Types of Steel 1. Pure iron becomes __________ when carbon is added.
(a) Extremely tough
(b) Hard
(c) Ductile
(d) None of these

2. Carbon steel contents less then _____________ carbon
(a) 1%
(b) 1.5%
(c) 1.7%
(d) 1.8%

3. Killed steels are opposite of__________
(a) Rimmed steel
(b) Alloy steel
(c) Stainless steel
(d) None of these

4. AISI recognizes more than ___________ types of stainless steel
(a) 4
(b) 40
(c) 140
(d) 150

5. 1 XXX indicates
(a) Carbon steel
(b) Alloy steel
(c) Rimmed steel
(d) None of these
Steel Manufacturing Process (1) All steel may not be contain
(a) Carbon
(b) Sulphar
(c) Phosphorous
(d) Nickel

2. Alloy steel can’t be manufactured by process
(a) Open- hearth
(b) Bessemer
(c) Crucible
(d) Electric arc

(3) Phosphorous in steel is found as ___________
(a) In its elemental form
(b) P205
(c) P203
(d) Fe3P

(4) Sulphar control is better achieved in
(a) Acid open-heath furnace
(b) Bessemer converter
(c) Electric furnace
(d) Induction furnace

(5) In conventional Bessemer process air is blown from
(a) Top
(b) Bottom
(c) Side
(d) None of these
Electric Arc Furnace (1) In arc process temperature can be controlled
(a) Roughly
(b) Accurately
(c) Can not be controlled
(d) None of these

(2) By arc process carbon content can be
(a) Removed
(d) Added
(c) Adjusted
(d) None of these

(3) Electric furnace was first introduced in USA in _____________
(a) 1806
(b) 1860
(c) 1906
(d) 1900

(4) Electric arc furnace offers the advantage of
(a) High thermal efficiency
(b) High electrical efficiency
(c) High hydraulic efficiency
(d) None of these

(5) Indirect are furnace electrodes may be made of
(a) Carbon or graphite
(b) Alum or graphite
(c) Manganese or graphite
(d) None of these
Industrial Shaping of Metals (1) An increase in the temperature of a metal leads to ______
(a) Increase in inter-atomic spacings
(b) Decreasing increase in inter-atomic spacings.
(c) No change in inter-atomic spacings
(d) None of these

(2) Most metals become considerably softer and more malleable as temperature rises, _____ energy is needed to produce a given amount of deformation.
(a) Less
(b) More
(c) No
(d) None of these

(3) Ductility generally _____________ with temperature
(a) Increase
(b) Decrease
(c) Remains constant
(d) None of these

(4) If a large number of identical forged components are required, it is possible to make them by ______.
(a) Forging
(b) Drop forging
(c) Heading
(d) Hot pressing

(5) Heading is employed extensively for
(a) Flange
(b) Plates
(c) Bolts and rivets
(d) All of these
Iron Carbide Diagram (1) The physical solidification process goes through ______ changes
(a) 2
(b) 3
(c) 1
(d) None

(2) Time-Temperature graphs are called
(a) Weibull Plots
(b) Cooling diagrams
(c) Equilibrium diagrams
(d) None of these

(3 )The point at which two metals are balance is called
(a) Critical point
(b) Contra flexure point
(c) Eutetic point
(d) None of these

(4) Changes occur as steel reaches critical point
(a) Volume
(b) Conductivity
(c) Molecular structural
(d) All of these

(5) Pearlite and Cementite are ________
(a) Unstable
(b) Stable
(c) Neutral
(d) None of these
Heat Treatment Equipment (1) The most ancient pyrometer is
(a) Camera
(b) Human eye
(c) Mirror
(d) None of these

(2) The thermocouple in a pyrometer consist of
(a) Two similar wire
(b) Three similar wires
(c) Two dissimilar wires
(d) None of these

(3) Thermocouple with Alumel and Chromel wires is used for
(a) Oxidizing conditions
(b) Reducing conditions
(c) Neutral conditions
(d) All of these

(4) Water paper is _______
(a) Scale removing agent
(b) Scale forming agent
(c) Neutral agent
(d) None of these

(5) The optical system of a microscope consist of
(a) Objective Lens
(b) Eyepiece lens
(c) Objective and eyepiece lenses
(d) None of these
Heat Treatment and Process (1) Cracking and warping of steel during quenching operation can be avoided by
(a) Spinning
(b) Interrupted quenching
(c) Rolling
(d) Can not be avoided

(2) The formation the pearlite results in
(a) Hard structure
(b) Liquid
(c) Soft structure
(d) None of these

(3) Moh’s scale is used to determine hardness of
(a) Metal
(b) Concrete
(c) Rock and mineral
(d) None of these

(4) Cooling has the effect of ______ the mixture of austenite, cementite and ferrite
(a) Malting
(b) Freezing
(c) Drying
(d) None of these

(5) The rate at which metal is cooled depends on
(a) Type of metal only
(b) Type of coolant only
(c) Type and coolant and metal
(d) None of these

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