Q.1
Blast furnace is a
Q.2
Resilience of a bolt can be increased by increasing its
Q.3
The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.
Q.4
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to
Q.5
Brazing is the joining of metals
Q.6
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
Q.7
Percentage of gaunge is maximum in the ore of
Q.8
Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity.
Q.9
Dislocations are __________ defects.
Q.10
Which of the following are considered applications of ultrasonic testing ?
Q.11
The most commonly used moderator in nuclear power plant is
Q.12
Mechanism/phenomenon involved in the improvement of fatigue strength of a material by shot peening is the
Q.13
__________ test is the appropriate test to determine whether a material is ductile or brittle.
Q.14
Basicity [%Cao + %MgO/% SiO₂) of the slag in Indian blast furnace is in the range of
Q.15
Thermoplastics are never moulded using
Q.16
The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.
Q.17
When the wavelength of incident X-rays increases, the angle of diffraction
Q.18
Unit molar solution of __________ is the best conductor of electricity.
Q.19
In cold working of metal as compared to its hot working
Q.20
Cast iron has the unique property of high
Q.21
The capital & running costs of similar machines having unequal service life can be compared by the __________ method.
Q.22
Carburettor in a spark ignition engine is used to
Q.23
A material is capable of resisting softening at high temperature, because of its property termed as
Q.24
With increase in pressure, the saturation temperature of steam
Q.25
The capacity of a material to absorb energy depends upon both its strength & stiffness. The term 'stiffness' of a material is the opposite of its
Q.26
__________ can not increase the fatigue strength of a material.
Q.27
Which of the following absorbs maximum heat in a high pressure boiler ?
Q.28
Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.
Q.29
Fibre glass is a composite material of
Q.30
In connection with corrosion of metals, passivation is the process that
Q.31
Cast iron has the unique property of high
Q.32
Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?
Q.33
A spark ignition petrol engine has
Q.34
__________ joint is mostly used for joining pipes carrying water at low pressure.
Q.35
Austempering process results in the formation of __________ structure.
Q.36
While the bin cards are used in the effective stores management, the queing theory is associated with the __________ time.
Q.37
Most of the phosphorous present in the blast furnace burden enters into
Q.38
The dimensions of Planck's constant is the same as that of the
Q.39
Which of the following has the highest density and the lowest melting point ?
Q.40
The primary strengthening mechanism in 70 : 30 brass is the
Q.41
Pick out the wrong statement.
Q.42
Quartz is a __________ material.
Q.43
Sulphur is melted in the sulphuric acid plant most commonly by employing
Q.44
With increase in carbon percentage in steel, its
Q.45
Machinability of hard alloys and tool steels is improved by
Q.46
A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
Q.47
Which of the following hardness tests uses the depth of penetration caused by the indentor as the parameter for arriving at the hardness value of a material ?
Q.48
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
Q.49
What happens, when SO₂ is passed through a solution of H₂S in water?
Q.50
Glass reacts with
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