Wrought iron does not have
Uniform strength in all directions
Ability to hold protective coating
High ductility & corrosion resistance
Easily weldable characteristics
Correct Answer :
A. Uniform strength in all directions
Related Questions
Glass reacts with
H2SO3
HF
HNO3
K2Cr2O7
Lead pencil contains
Graphite
Lead sulphide
Lead
Both (B) & (C)
An abrupt and sudden fall in the reading of barometer is an indication of the
Storm
Rain
Clear weather
Cold wave
One of the methods of purification of leach liquor is ion exchange, which involves
Exchange between two liquid phases
Exchange between a gaseous phase and a liquid phase
Exchange between a liquid phase and an organic resin phase
Exchange between a solid phase and a gas phase
Identify the correct statement with reference to the extractive metallurgy of aluminium.
The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3
Approximately 80% of the aluminium deposited on the cathode comes from cryolite
Sodium is deposited along with aluminium, but is immediately vaporised
Anode effect sets in when the cryolite concentration goes below 40%.
Potable water means the water used for
Fire-fighting
Cooling
Drinking
Evaporation to produce steam
Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same
Period increases
Period decreases
Group increases
Both 'b' & 'c'
On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is
Creep
Toughness
Tensile strength
Fatigue
Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium
Nitrate
Sulphate
Carbonate
Chloride
If Reynolds number is greater than 1, then the
Viscous force is larger than the inertia force
Inertia force is larger than the viscous force
Inertia force is larger than the surface tension force
Inertia force is larger than the gravitational force
Silicon in steel
Makes it usable in almost all magnetic circuits where alternating current is used
Increases its electrical resistivity and decreases the hysteresis loss
Is present upto 5% & 4% respectively when used in transformers & motor armatures
All 'a', 'b' & 'c'
The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.
0.2
0.4
0.6
0.8
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
Cresylic acid
Xanthaies
Pine oil
All 'a' 'b' & 'c'
Which of the following low melting alloy containing bismuth and lead is used for electric fuse?
Wood's metal
Babbitt metal
Monel metal
Duralumin
Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.
+4000
-4000
10000
-10000
Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.
Creep
Fatigue
Endurance
Tensile
Propulsion of rocket follows from the
Newton's second law of motion
Newton's third law of motion
Law of projectiles
Archimedes principle
Vernier calipers cannot be used to measure the
I.D. & O.D. of the shaft
Thickness of parts
Depth of holes
Clearance between two mating surfaces
Temper brittleness of a material can be fairly detected by the __________ test.
Fatigue
Notched bar impact
Tensile
Hardness
Pick out the correct statement.
Materials exhibiting high elasticity obey Hooke's law
The elastic behaviour of rubber under compression is the same as its behaviour under tension
The damping capacity of a material is due to its plastic deformation
The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations
The joint for soldering is supported by binding wire made of
Mild steel
Copper
Soft iron
Stainless steel
The process of removal of scale formed during hot rolling of steel is termed as
Descaling
Shot blasting
Pickling
Skimming
With increase in annealing temperature, the following defect density decreases.
Vacancy
Dislocation
Grain boundary
All of these
A reduction in thermal resistance during heat transfer does not occur in the
Convection heat transfer by stirring the fluid and cleaning the heating surface
Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity
Radiation heat transfer by increasing the temperature and reducing the emissivity
None of these
The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their
Equivalent weight
(Equivalent weight)2
Molecular weight
(Molecular weight)2
Dielectric
Is an electrical insulating material
Of low resistivity is preferred
Should have high thermal conductivity
Need not defy the corrosive action of chemicals
Shaft/rotor speed is most accurately measured by a
Frequency counter
Tachometer
Strobometer
Speedometer
In a neutral solution
H+ ions are absent
OH- ions are absent
Both H+ and OH- ions are present in very small but equal concentration
None of these
The most suitable material for die casting is
Iron
Copper
Steel
Nickel
The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log 4 = 0.6)
4.4
5.6
8.4
2.4