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Quiz 8
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Q.1
Which of the following is the easiest to bend?
Steel
Stainless steel
Cast iron
Wrought iron
Q.2
Iron rust is
Ferrous oxide
Hydrated ferric oxide
Powdered iron
Ferric sulphide
Q.3
Which of the following is a low melting point metal?
Stainless steel
Wrought iron
Tin
Copper
Q.4
Which of the following is the most elastic material?
Plastic
Glass
Steel
Rubber
Q.5
Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about
Half
One third
One fifth
One twelfth
Q.6
High degree of toughness is a must for
High speed steel
Shock resisting steel
Cold work tool steel
None of these
Q.7
Concrete tank can be used to store
Alum
Ferrous sulphate
Sulphuric acid
Saturated brine
Q.8
The softest material in Mho's scale (for measuring hardness) is
Talc
Gypsum
Rubber
None of these
Q.9
Lead
Is the hardest metal in common use
Is the lightest metal in common use
Can not be scratched by finger nails
Can not be work hardened
Q.10
Addition of 2% nickel in steel makes it suitable for making
Electronic valves
Boiler plates, rivets etc
Turbine blades
Connecting rod
Q.11
Mild steel storage vessels are suitable for the storage of
Anhydrous ammonia
Fatty acids
Hydrochloric acid (95%)
Sulphuric acid (25%)
Q.12
In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of
Stainless steel
Cast iron
Lead lined steel
Rubber lined steel
Q.13
Presence of nitrogen in steel
Makes it brittle
Increases its strength
Increases its hardness
Is desirable
Q.14
Presence of silicon in steel
Is in the form of free Si
Indicates that steel is not deoxidised properly
Decreases the blow holes formation tendency in castings
None of these
Q.15
Carbon is present in steel wholly in the
Combined form
Free state as graphite
Both A & B
Neither A nor B
Q.16
Visco-elastic behaviour of materials which is time dependent is common in
Plastics
Crystalline solid
Non-crystalline solids
Non-crystalline organic polymer
Q.17
Nickel (76%) and chromium (15%) alloys are termed as
Inconel
Monel
Aluminium bronzes
Brass
Q.18
Nitriding of steel is done (in electric furnace) at __________ °C.
510
1720
2210
910
Q.19
Steel rods are used in reinforced concrete to increase its __________ strength.
Shear
Tensile
Compressive
None of these
Q.20
Addition of __________ in steel can help in increasing the depth of hardness.
Nickel
Chromium
Vanadium
Tungsten
Q.21
Molten phthalic anhydride is stored in a/an __________ vessel.
Aluminium
Nickel clad steel
Lead lined steel
Glass lined steel
Q.22
Hastelloy C is a good material of construction in chemical process industry, since it is
Highly corrosion resistant and is readily fabricated
Relatively inexpensive although it can be fabricated with some difficulty
Corrosion resistant to most alkalis, particularly because of its coper content
Light and resists attack by acids
Q.23
Spray dryer for evaporating milk to produce milk powder is made of
Lead lined steel
Stainless steel
Aluminium
Cast iron
Q.24
Ability of a material to absorb energy in deformation in the plastic range is characterised as its
Ductility
Toughness
Creep
Resilience
Q.25
Evaporator used for concentrating tomato juice is made of
Nickel
Brass
Stainless steel-glass lined
Cast iron-rubber lined
Q.26
Pure nickel is
Ferromagnetic above its curie point (i.e., 415°C)
Having h.c.p. crystal lattice
Ferromagnetic at room temperature
Not resistant to oxidation at high temperature
Q.27
Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its
High strength to weight ratio
Low temperature strength properties
Its ability to be cast, rolled, forged & stamped
High strength and corrosion & oxidation-resistance at elevated temperature
Q.28
Babbit metal used for bearings is a____base alloy.
Tin
Lead
Aluminium
Copper
Q.29
Ceramic recuperators are generally made of
Silicon carbide
Calcium carbide
Fireclay bricks
High alumina bricks
Q.30
'Hypersil' is a __________ steel.
High speed
Silicon
Molybdenum
Tungsten
Q.31
Which of the following alloying elements is present in maximum percentage in high speed steel.
Molybdenum
Chromium
Tungsten
Vanadium
Q.32
Hardest material so far found is
Diamond
Graphite
Carborundum
Pumice stone
Q.33
A hardness depth of about 3 mm can be achieved by induction hardness in __________ seconds.
5
100
250
500
Q.34
The most commonly used resin for making reinforced plastic is
Unsaturated polyester
Polypropylene
Polyurathane
Nylon-6
Q.35
The hardest material just prior to diamond in Mho's scale is
Topax
Carborundum
Corrundum
Calcite
Q.36
Perspex is nothing but
Acrylic sheet
An elastomer
An alloy of lead and tin
Aluminium foil clad with bakelite
Q.37
Phenol is not shipped in
Nickel lined steel tank cars
Galvanised or tin lined drums
Boxed glass carboys
Cast iron containers
Q.38
Pick out the wrong statement.
Alloys are harder than their component elements
Presence of silicon in steel decreases its electrical resistance
Karbate is an acid resistant material of construction
Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C
Q.39
Plastics are
Used in very high temperature applications
Non-biodegradable
Not suitable for drainage pipe manufacture
All of the above
Q.40
Invar used in thermocouples is an alloy of nickel and
Iron
Copper
Chromium
Lead
Q.41
The hardest material just prior to diamond in Mhos scale is
Topax
Carborundum
Corrundum
Calcite
Q.42
Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of
Brass
Copper
High carbon steel
Aluminium
Q.43
Liquid ammonia is shipped in __________ containers.
Steel
Aluminium
Glass
Lead lined
Q.44
Which of the following is not a copper based alloy with nickel?
German silver
Monel metal
Inconel
Constantan
Q.45
The presence of impurities in iron
Increases its melting point
Does not affect its melting point
Decreases its melting point
Makes it malleable
Q.46
The process of coating steel sheets by zinc to improve its corrosion resistance is called
Calorising
Galvanising
Zincification
Tempering
Q.47
The main constituent of carborundum is __________ carbide.
Calcium
Silicon
Boron
Aluminium
Q.48
Bronze is an alloy of copper and
Lead
Tin
Nickel
Zinc
Q.49
Material of construction of pipe generally used for conveying water in India is
Stainless steel
Cast iron
Wrought iron
Lead lined steel
Q.50
Wrought iron is having very high
Hardness
Strength
Corrosion resistance
Susceptibility to changes in its properties by heat treatment
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