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Q.1
Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)
Do not require heat treatment for any of its applications
Are used for leaf and coiled springs
Do not have good resilience properties
Is tempered at 850°C
Q.2
Nickel and copper are the basic constituents of
Hastelloy
Monel metal
German silver
Inconel
Q.3
Nickel and molybdenum are the basic constituents of
Hastealloy
German silver
Inconel
Solder
Q.4
Nickel as a material of construction
Is used as an alloying element for both ferrous & non-ferrous alloys
Is paramagnetic below 415° C (its Curie temperature)
Dimagnetic
Has a body centred cubic (bcc) crystal lattice structure
Q.5
Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property?
Silicon
Phosphorus
Sulphur
None of these
Q.6
An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called
Constantan
Kanthal
Chromel
German silver
Q.7
Brinell Hardness Number (BHN) for talc is approximately in the range of
1-5
20-30
100 -150
200 - 250
Q.8
Dies for wire drawing are generally made of
Mild steel
Stainless steel
Carbides
High carbon steel
Q.9
High resistance electrical heating elements/wire are not made of
Marageing steel
Nimonic alloys
Kanthal wire
Nichrome
Q.10
White cast iron as compared to grey cast iron is
More durable
Very brittle
Very hard
All of the above
Q.11
Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower
Price
Corrosion resistance
Thermal conductivity
Abundant availability
Q.12
Inconel is an alloy of
Tin, zinc and nickel
Iron, nickel and chromium
Copper and nickel
Copper and tin
Q.13
Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress.
Ultimate
Yield point
Proof
None of these
Q.14
Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?
Invar
Constantan
Chromel
Alumel
Q.15
In drop forging process, the forging is done by dropping the __________ at high velocity.
Hammer
Workpiece
Die with hammer
Weight on hammer
Q.16
Most of the common metals have __________ crystal structure.
Cubic
Hexagonal
Orthorhombic
None of these
Q.17
Soap kettle used in the production of laundry soap is made of
Steel with top section nickel clad or stainless steel
Cast iron
Nickel
Concrete
Q.18
In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of
Concrete
Wood
Steel
Porcelain
Q.19
Cast iron is a __________ material.
Brittle
Ductile
Tough
Malleable
Q.20
Shock resisting steels should possess high
Hardness
Toughness
Tensile strength
Wear resistance
Q.21
When the steel is subjected to normalising, its __________ decreases.
Yield point
Ductility
Ultimate tensile strength (UTS)
None of these
Q.22
Molybdenum steels containing 0.15 to 0.40% molybdenum
Are prone to temper brittleness
Are used for automobile parts like gears, axle, shaft, bearings etc
Have very poor fatigue resistance
Do not contain nickel or chromium or both
Q.23
The increase in hardness of metal due to its cold working is termed as the __________ hardening.
Work
Age
Induction
Flame
Q.24
Rubber lined vessels are corroded by the action of
Aqua regia
Chloroform
Sulphuric acid (95%)
All of the above
Q.25
Pick out the wrong statement.
Bronze is an alloy of copper & tin
Brass is an alloy of copper & zinc
The alloy named 'German silver' does not contain any silver
The ability of a material to fracture without appreciable deformation is called its ductility
Q.26
Carbon is present in the combined form (carbide) in case of
Pig iron
Steel
Ferroalloys
All of the above
Q.27
Hastelloy comprises of
Copper and tin
Copper and nickel
Molybdenum and nickel
Lead and tin
Q.28
Reduction in the grain size reduces the __________ of the material.
Fatigue resistance
Tensile strength
Creep resistance
All of the above
Q.29
The 'bomb' in the bomb calorimeter is made of
Molybdenum stainless steel
Mild steel
High silicon iron (14% Si)
Copper
Q.30
Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is
Used for making axle & shafts of aeroplanes, automobiles and locomotives
Having poor fatigue resistance
Having poor toughness
Not helpful in producing cleaner steel due to oxidising action of vanadium
Q.31
Liners of a ball mill are never made of
Lead
Alloy steel
Rubber or ceramic material
Cast iron
Q.32
Which is an amorphous material?
Glass
Mica
Brass
Cast iron
Q.33
Pick out the correct statement.
Stainless steel is nothing but chromium coated steel
Hardening of a soft metal can be done by alloying it with another metal or non-metal
Plastic deformation of a material is its temporary distortion under the action of applied stress
Rusting of iron is not electrochemical in nature
Q.34
Plate and frame filter press is usually made of
Mild steel
Cast iron
Stainless steel
Galvanised iron
Q.35
Sheardising process is used for
Surface coating
Heat treatment of high speed steel
Cold working on metals
None of these
Q.36
Very high sulphur in pig iron makes
Its casting unsound
Its hard and machinable
Its brittle and malleable
All of the above
Q.37
Which of the following crystal structures characterises the ferritic stainless steel?
Face centred cubic
Body centred cubic
Simple hexagonal
None of these
Q.38
__________ is used for determining the tensile strength of steels.
Hydraulic press
Universal testing machine
Mechanical press
None of these
Q.39
High speed steel should have high
Toughness
Wear resistance
Hardenability
Both B & C
Q.40
High carbon steel contains more than __________ percent carbon.
0.5
2.2
2.5
2.8
Q.41
Which of the following has the least value of ultimate tensile strength (UTS)?
Medium carbon steel
High carbon steel
Cast iron
Wrought iron
Q.42
Maximum consumption of zinc is in
Alloying
Galvanising
Utensil manufacture
Electrical industry
Q.43
Which of the following is the lightest of engineering metals?
Magnesium
Aluminium
Titanium
Tin
Q.44
Glass is corroded by
Fluorine (dry or wet)
Sulphuric acid
Phosphoric acid
None of these
Q.45
Fatigue strength of a material increases by
Having notches in the specimen
Rise in temperature
Under stressing the specimen
Having scratches on the surface
Q.46
Which of the following alloy steels is the most suitable for making gun barrels and projectiles?
Tungsten steel
Molybdenum steel
Nickel-chrome steel
Cobalt steel
Q.47
Which of the following has the highest compressive strength?
Wrought iron
Cast iron
Mild steel
High carbon steel
Q.48
The range of Mho's scale of hardness is from
1 to 15
1 to 8
1 to 10
0 to 10
Q.49
Purity of electrical grade aluminium should be ≥ __________ percent.
95
99.5
85
90
Q.50
Which of the following exercises most powerful influence on the mechanical properties of steel?
Manganese
Carbon
Phosphorous
Silicon
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