Q.1

The main alloying elements high speed steel in order of increasing proportion are

  • vanadium, chromium, tungsten
  • tungsten, titanium, vanadium
  • chromium, titanium, vanadium
  • tungsten, chromium, titanium
Q.2

In basic bessemer process, the furnace is lined with

  • silica bricks
  • a mixture of tar and burnt dolomite bricks
  • either (a) or (b)
  • none of these
Q.3

A steel containingtochromium and about 0.carbon is called

  • ferritic stainless steel
  • austenitic stainless steel
  • martensitic stainless steel
  • nickel steel
Q.4

The metal suitable for bearings subjected to light loads, is

  • silicon bronze
  • white metal
  • monel metal
  • phosphor bronze
Q.5

Combined carbon in iron makes the metal

  • soft and gives coarse grained crystalline structure
  • soft and gives a fine grained crystalline structure
  • hard and gives a coarse grained crystalline structure
  • hard and gives a fine grained crystalline structure
Q.6

When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces

  • white cast iron
  • nodular cast iron
  • malleable cast iron
  • alloy cast iron
Q.7

Which of the following steel making process is being adopted at Rourkela Steel Plant?

  • Bessemer process
  • Open-hearth process
  • Electric process
  • L-D process
Q.8

18-4-1 high speed steel contains

  • vanadium 4%, chromium 18% and tungsten 1%
  • vanadium 1%, chromium 4% and tungsten 18%
  • vanadium 18%, chromium 1% and tungsten 4%
  • none of the above
Q.9

The type of space lattice found in alpha-iron is

  • face centred cubic space lattice
  • body centred cubic space lattice
  • close packed hexagonal space lattice
  • none of these
Q.10

Beryllium bronze has

  • high yield point
  • high fatigue limit
  • both (a) and (b)
  • none of these
Q.11

Specify the sequence correctly

  • Grain growth, recrystallisation, stress relief
  • Stress relief, grain growth, recrystallisation
  • Stress relief, recrystallisation, grain growth
  • Grain growth, stress relief, recrystallisation
Q.12

The upper critical point varies according to the carbon content in steel.

  • True
  • False
Q.13

Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?

  • Babbit metal
  • Monel metal
  • Nichrome
  • Phosphor bronze
Q.14

Polyvinylchloride (PVC) is a __________ material.

  • thermoplastic
  • thermosetting
Q.15

The alloy, mainly used for corrosion resistance in stainless steels is

  • silicon
  • manganese
  • carbon
  • chromium
Q.16

The strength is the ability of a material to resist

  • deformation under stress
  • externally applied forces with breakdown or yielding
  • fracture due to high impact loads
  • none of these
Q.17

The brown smoke during the operation of a bessemer Converter indicates that the

  • air is burning out silicon and managanese
  • silicon and manganese has burnt and carbon has started oxidising
  • the converter must be titled to remove the contents of the converter
  • the brown smoke does not occur during the operation of a bessemer converter
Q.18

Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities?

  • Sulphur
  • Phosphorus
  • Manganese
  • Silicon
Q.19

Thermoplastic materials are those materials which

  • are formed into shape under heat and pressure and results in a permanently hard product
  • do not become hard with the application of heat and pressure and no chemical change occurs
  • are flexible and can withstand considerable wear under suitable conditions
  • are used as a friction lining for clutches and brakes
Q.20

In a unit cell of a body centred cubic space lattice, there are __________ atoms.

  • six
  • nine
  • fourteen
  • seventeen
Q.21

Silicon is added in low carbon steels to

  • make the steel tougher and harder
  • make the steel of good bending qualities
  • raise the yield point
  • all of these
Q.22

Which of the following material has maximum malleability?

  • Lead
  • Soft steel
  • Wrought iron
  • Copper
Q.23

A coarse grained steel

  • is less tough and has a greater tendency to distort during heat treatment
  • is more ductile and has a less tendency to distort during heat treatment
  • is less tough and has a less tendency to distort during heat treatment
  • is more ductile and has a greater tendency to distort during heat treatment
Q.24

Which of the following metal is used for nuclear energy?

  • Uranium
  • Thorium
  • Niobium
  • all of these
Q.25

In a unit cell of close packed hexagonal space lattice, there are twenty four atoms.

  • Correct
  • Incorrect
Q.26

The temperature required for full annealing in hyper-eutectoid steel is

  • 30° C to 50° C above upper critical temperature
  • 30° C to 50° C below upper critical temperature
  • 30° C to 50° C above lower critical temperature
  • 30° C to 50° C below lower critical temperature
Q.27

Martensite has needle like structure and is magnetic.

  • Correct
  • Incorrect
Q.28

Monel metal contains

  • 65% nickel, 15% chromium and 20% iron
  • 68% nickel, 29% copper and 3% other constituents
  • 80% nickel and 20% chromium
  • 80% nickel, 14% chromium and 6% iron
Q.29

Admirality gun metal contains

  • 60% copper, 35% zinc and 5% manganese
  • 76% copper, 20% silicon and 4% zinc
  • 82% copper, 12% zinc and 6% manganese
  • 88% copper, 10% tin and 2% zinc
Q.30

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
Q.31

Which of the following material has maximum ductility?

  • Mild steel
  • Copper
  • Nickel
  • Aluminium
Q.32

Cast iron has

  • high compressive strength
  • excellent machinability
  • good casting characteristic
  • all of these
Q.33

According to Indian standard specifications, cast iron designated by 'FGmeans

  • white cast iron with B.H.N. 150
  • white cast iron with 150 MPa as minimum compressive strength
  • grey cast iron with B.H.N. 150
  • grey cast iron with 150 MPa as minimum tensile strength
Q.34

Nichrome contains more iron than Inconel.

  • Agree
  • Disagree
Q.35

Monel metal is an alloy of

  • nickel and copper
  • nickel and chromium
  • nickel, chromium and iron
  • copper and chromium
Q.36

A fine grained steel

  • is less tough and has a greater tendency to distort during heat treatment
  • is more ductile and has a less tendency to distort during heat treatment
  • is less tough and has a less tendency to distort during heat treatment
  • is more ductile and has a greater tendency to distort during heat treatment
Q.37

The percentage of phosphorus is phosphor bronze is

  • 0.1
  • 1
  • 11.1
  • 98
Q.38

Cartidge brass can be

  • cold rolled into sheets
  • drawn into wires
  • formed into tube
  • any one of these
Q.39

An eutectoid steel consists of

  • wholly pearlite
  • wholly austenite
  • pearlite and ferrite
  • pearlite and cementite
Q.40

The nuts and bolts are made from silicon steel.

  • Correct
  • Incorrect
Q.41

The red flame during the operation of a bessemer converter indicates that the

  • air is burning out silicon and manganese
  • silicon and manganese has burned out and carbon has started oxidising
  • converter must be tilted to remove the contents of the converter
  • red flame does not occur during the operation of a bessemer converter
Q.42

Hardness of steel is increased by adding sulphur, lead and phosphorus.

  • Yes
  • No
Q.43

Chromium when added to steel __________ the tensile strength.

  • does not effect
  • decreases
  • increases
Q.44

In induction hardening, the depth of hardening is controlled by controlling the voltage.

  • Correct
  • Incorrect
Q.45

Babbit metal contains

  • 50% tin and 50% antimony
  • 66% tin, 30% copper and 4% antimony
  • 88% tin, 4% copper and 8% antimony
  • 92% tin, 6% copper and 2% antimony
Q.46

In high speed steels, vanadium adds to the property of red hardness and tungsten and chromium add to high wear resistance.

  • True
  • False
Q.47

Which of the following statement is correct?

  • The product produced by blastfurnace is called cast iron.
  • The pig iron is the name given to the product produced by cupola.
  • The cast iron has high tensile strength.
  • The chilled cast iron has no graphite.
Q.48

Shock resisting steels should have

  • low wear resistance
  • low hardness
  • low tensile strength
  • toughness
Q.49

Silicon in cast iron

  • makes the iron soft and easily machinable
  • increases hardness and brittleness
  • makes the iron white and hard
  • aids fusibility and fluidity
Q.50

Phosphor bronze has

  • high resistance to corrosion
  • good wearing qualities and high elasticity
  • valuable cold working property
  • all of these
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