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Quiz 10
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Q.1
Which of the following will have the highest melting point?
Pig iron
Mild steel
Wrought iron
High carbon steel
Q.2
Water gas generator is made of
Carbon steel-brick lined
Stainless steel-lead lined
Cast iron
High carbon steel-procelain lined
Q.3
Aqueous nitric acid is stored in
Steel drum
Stainless steel vessel
Cast iron vessel lined with acid-proof masonry brick
Cast iron vessel
Q.4
Sulphur melting pit in the sulphuric acid plant is made of
Lead lined stainless steel
Cast iron
Steel or cement-brick lined
Hard wood
Q.5
Maximum consumption of copper is in
Utensil manufacture
Electrical industry
Industrial equipment manufacture
Small scale industries
Q.6
Corrosion involves exchange of electrons in __________ corrosion.
Chemical
Electrochemical
Both A & B
Neither A nor B
Q.7
Materials having __________ lattice structure are usually most ductile.
F.c.c.
B.c.c.
H.c.p.
Cubic
Q.8
The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.
0.2
2
4
8
Q.9
Which of the following is not an alloy of copper and tin?
Bell metal
Gun metal
Admiralty gun metal
Monel metal
Q.10
Thermosetting polymers are
Injection moulded
Cast molded
Extruded
None of these
Q.11
Tin coating is not done by
Vaporising
Hot dipping
Electro deposition
Spraying
Q.12
Tin vessels are corroded by
Anhydrous ammonia
Aromatic solvents
Synthetic detergent solution
None of these
Q.13
Ferric stainless steels compared to austenitic stainless steels
Have lower corrosion resistance
Are harder to fabricate
Are less ductile and hence less suitable for cold pressing
All of the above
Q.14
Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with
Karbate
Lead or glass
Fireclay bricks
PVC
Q.15
A measure of toughness of a material is its
Percentage elongation
Yield strength
Ultimate strength
Area under stress-strain diagram
Q.16
Telfon (PTFE) is corroded by
Hydrochloric acid (10%)
Hydrochloric acid (95%)
Sulphuric acid
None of these
Q.17
Cast iron detachable joint is used in __________ pipes.
Steel
Cast iron
Asbestos cement
Reinforced cement concrete
Q.18
Containers made of high silicon cast iron (14% Si) are not suitable for the storage of
Acetic acid
Benzoic & boric acids
Phosphoric acid (95%) & sulphuric acid (95%)
Hydrochloric acid (concentrated)
Q.19
The softest material just next to talc in the Mhos scale is
Quartz
Gypsum
Feldspar
Fluorite
Q.20
Lead lined equipments & vessels are suitable for handling
Hydrochloric acid (10%)
Nitric acid
Sulphuric acid upto 60°C
All of the above
Q.21
'Semi steel' is
Produced by adding 10-20% steel to the cupola charge
Stronger than cast iron
Both A & B
Neither A nor B
Q.22
Brass container is suitable for storing
Aqueous ammonia
Beer
H₂SO₄(95%)
Phosphoric acid (95%)
Q.23
Hardening of steel is not possible unless it is heated __________ critical point.
Above the highest
Above the lowest
Between the first & second
Between the second & third
Q.24
Vycor, a widely used material for making 'thermal wells' in temperature measurement, is a
Cermet
Glass
Thermosetting plastic
Metallic alloy
Q.25
Electronic structure of a material is generally studied by
Metallurgical microscope
Electron diffraction
Spectroscopic techniques
X-ray
Q.26
__________ alloys have the highest specific strength of all the structural materials out of the following.
Magnetic steel
Titanium
Chromium
Magnesium
Q.27
Carbon supply in pack carburising process is in the form of
Charcoal
Calcium carbide
Hydrocarbon oil
Graphite
Q.28
Thermoplastic resins are those polymers, which
Has decreased plasticity at increasing temperature
Can not be moulded
Easily deform under pressure at high temperature
None of these
Q.29
Mild steel is a/an __________ steel.
Low carbon
Medium carbon
High carbon
High alloy
Q.30
__________ is added in low carbon steel to raise its yield point.
Sulphur
Phosphorous
Silicon
Manganese
Q.31
Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.
Chromium
Nickel
Tungsten
Cobalt
Q.32
The digester of a Gobar gas plant is a
Mild steel drum
Stainless steel vessel
Masonry well
Cast iron vessel
Q.33
The ability of a material to absorb energy in the elastic range is a measure of its
Toughness
Resilience
Malleability
Brittleness
Q.34
Spark plugs are made of
High alumina ceramic
Metallic carbides
Corundum
Carborundum
Q.35
Which of the following commercial metals is most abundantly found in India?
Copper
Aluminium
Nickel
Zinc
Q.36
Maximum carbon content in cast iron is __________ percent.
3.8
5.2
4.8
4.3
Q.37
Babbit metals used for making bearings are
Tin or lead based alloys
Short of antifrictional properties
Having homogenous microstructure
Yellow metals
Q.38
Presence of manganese in alloy steel improves its
Corrosion resistance
Cutting ability
Abrasion resistance & toughness
Elasticity & creep resistance
Q.39
As the impurities are oxidised, the melting point of iron
Decreases
Remains unchanged
Increases
May increase or decrease ; unpredictable
Q.40
Slow plastic deformation of metals under a constant stress is termed as __________ failure.
Fatigue
Endurance
Creep
None of these
Q.41
Most common stainless steel type 316, which is highly resistant to corrosion contains
16-13% Cr 10-14% Ni and 2-3% Mo
20-22% Cr, and 8-10% Ni
2-4% Cr, 22% NI and 2-4% Mo
None of these
Q.42
Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system?
High silicon iron, silicon rubber, Kel-F and teflon
Mild steel and stainless steel
Cast iron, tin and aluminium
Copper, nickel and monel
Q.43
Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its
High co-efficient of thermal expansion
Low thermal conductivity
High corrosion resistance
All of the above
Q.44
Rotary kilns in cement industry are lined with____bricks.
Fireclay
Silica
Lead
High alumina & high magnesia
Q.45
Out of the following, copper vessels are the most suitable for the storage of
Bromine
Dry chlorine & dry fluorine
Nitric acid (95% and fuming)
Phosphoric acid (95%) & sulphuric acid (95% and fuming)
Q.46
Stainless steel contains
Chromium and nickel
Copper
Aluminium
Vanadium
Q.47
Glass lined vessels are not used for handling
Dilute HNO₃
Dilute HNO₃
Dilute HCI
Hydroflouric acid
Q.48
Thermosetting resins are those polymers, which
Do not increase in plasticity with rise in temperature
Allow slip to occur between molecules
Do not take on a permanent set
None of these
Q.49
Corrosion resistance of steel is increased by the addition of
Phosphorous and tungsten
Nickel and chromium
Lead and vanadium
Molybdenum and tungsten
Q.50
Tin in its pure form is used for making
Cans for food packing
Collapsible tubes for toilet preparations
Foil for wrapping cheese
All of the above
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