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4
In an eutectic system, two elements are completely
A. Soluble in solid state
B. Insoluble in liquid state
C. Insoluble in both solid & liquid state
D. Soluble in liquid state
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4
Property responsible for the talcum powder to cling to the skin is the
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4
The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is
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4
Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
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4
Lead is added to 60:40 brass primarily to improve
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The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their
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4
Steel balls are manufactured by
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4
The approximate height of a blast furnace having a useful volume of 2000 m3 is about __________ metres
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In a good rimming steel
A. Carbon and silicon should be low
B. Silicon should be low but carbon should be high
C. Both silicon & carbon should be high
D. Silicon should be high but carbon should be low
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4
__________ has a negative co-efficient of linear expansion.
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Hot extrusion of aluminium is done in the temperature range of __________ °C.
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The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.
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The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong
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Ultimate strength in tension as compared to that in shear for steel is
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A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its
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Which of the following is not a charge material for cupola?
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The most important requirement for aluminium industry is the availability of cheap
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The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the
A. Ability to absorb shock
B. Capacity to store energy
C. Ratio of the wire & coil diameters
D. Load to produce unit deflection
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4
The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.
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4
The best lubricants for a machine working at high temperature & load is
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4
Between 230 and 370°C, blue brittleness is caused in mild steel because of the
A. Immobility of dislocation
C. Increase in Young's modulus
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4
Which of the following equipments is used for liquid dispersion?
C. Bubble cap plate column
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4
The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)
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4
Particle nature of cathode rays is proved due to the fact that they
A. Travel in a straight line
B. Get deflected by magnetic electric field
D. Heat the exposed material
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4
The most suitable material for die casting is
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4
Cemented carbide tools are not suitable for cutting
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4
Which of the following is the largest quantum of pressure?
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The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.
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Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam will be
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4
The most commonly used moderator in nuclear power plants is