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Which of the following has the highest modulus of elasticity (about 7 × 106 kg/cm2)?

A. High speed steel

B. Stainless steel

C. Tungsten carbide

D. Superalloys

Correct Answer :

C. Tungsten carbide


Related Questions

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Temper brittleness of a material can be fairly detected by the __________ test.

A. Fatigue

B. Notched bar impact

C. Tensile

D. Hardness

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Spheroidising of a material is a/an __________ process.

A. Normalising

B. Annealing

C. Tempering

D. Hardening

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The most commonly used moderator in nuclear power plants is

A. Graphite

B. Light water

C. Heavy water

D. Beryllium

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In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of

A. Stainless steel

B. Mild steel

C. High speed steel

D. High carbon steel

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__________ of test specimens is not involved in any hardness testing method.

A. Fracture

B. Indentation

C. Wear

D. Scratch

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Holes for riveting purposes should be preferably made by

A. Cutting torch

B. Drilling

C. Punching

D. None of these

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Calorific value of __________ are almost same.

A. Lignite & anthracite coal

B. Lignite & coal gas

C. Petrol & diesel

D. Coal gas & natural gas

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Dephosphorization of molten pig iron is favoured by

A. Oxidising and basic slag

B. Reducing and basic slag

C. High activity co-efficient of phosphorous in metal

D. Oxidising and neutral slag

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__________ pipe is the most suitable for carrying sanitary drainage.

A. Stainless steel

B. Reinforced cement concrete

C. Cast iron

D. Asbestos cement

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Which of the following is the most suitable abrasive for grinding high tensile strength materials?

A. Silicon carbide

B. Corundum

C. Aluminium oxide

D. Boron carbide

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Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

A. Aluminium

B. Copper

C. Titanium

D. Stainless steel

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Hydro-cyclone is a

A. Crusher

B. wet classifier

C. Dry classifier

D. Magnetic separator

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Steels with high carbon equivalent have poor Weldability, because in these steels during welding

A. Carbon and other alloying elements get oxidised from the weld pool

B. Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld

C. Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld

D. Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld

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Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

A. 9 : 1

B. 17 : 1

C. 23 : 1

D. 29 : 1

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Which of the following does not discharge the dust collected as a dry solid?

A. Electrostatic precipitator

B. Wet scrubber

C. Bag filter

D. Gravity settling chamber

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__________ is not a heat treatment process.

A. Cyaniding

B. Parkerizing

C. Austempering

D. Martempering

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A dummy activity is used in PERT network to describe the

A. Precedence relationship

B. Resource idleness

C. Resource restriction

D. Necessary time delay

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Desalination of water

A. Makes it potable

B. Makes it non-potable

C. Means distillation of water

D. None of these

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In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, = velocity gradient).

A.

B.

C.

D.

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Which of the following hardness tests does not measure the indentation hardness of metals and alloys?

A. Vickers hardness test

B. Shore scleroscope test

C. Brinell hardness test

D. Rockwell hardness test

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A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/sec2 is

A. 8.82

B. 9.81

C. 10.88

D. 0.95

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Which of the following properties of a solid is not dependent on crystal imperfection?

A. Ductility

B. Semi-conductivity

C. Melting point

D. Yield stress

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Atomic __________ of an element is a whole number.

A. Weight

B. Number

C. Volume

D. Radius

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Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to

A. Sorbite

B. Bainite

C. Martensite

D. Troostite

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Which one of the following is incombustible?

A. H2

B. CCl4

C. C2H2

D. S

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Evaporative cooling process employs a combination of cooling and humidification in which the

A. Sensible heat is added

B. Sensible heat is removed and the latent heat is added

C. Latent heat is removed

D. Sensible heat is added and latent heat is removed

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Out of the following, the __________ pipe has the least corrosion resistance.

A. Mild steel

B. Copper

C. Cast iron

D. Wrought iron

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If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

A. Critical

B. Breeder

C. Fertile

D. Heterogeneous

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Ganister contains maximum percentage of

A. FeO

B. SiO2

C. MgO

D. MnO2

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The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.

A. Refrigerant cooling

B. Evaporator

C. Condenser

D. Throttling