Q.1
Absorptivity of a grey body varies with the
Q.2
The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the
Q.3
Coating of zinc over steel is known as
Q.4
The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.
Q.5
Addition of __________ in steel can help in increasing the depth of hardness.
Q.6
A solar cell converts the sunlight directly into __________ energy.
Q.7
A boy weighing 110lb climbs up a 50 ft high vertical destination in 100 seconds. Horse power of the boy is __________ hp.
Q.8
Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm.
Q.9
Batch process is preferred over continuous process, when the
Q.10
Transformer cores are normally made from
Q.11
The tensile strength of plastics ranges from __________ kg/mm².
Q.12
Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.
Q.13
RADAR is
Q.14
All modes of heat transfer i.e., conduction, convection & radiation occur in case of the
Q.15
Usual value of the resistance suitable for a wire resistance strain gauge is __________ ohms.
Q.16
Regeneration of molecular seive requires it to be heated to a temperature of about __________ °C.
Q.17
Ferromagnetic material owe their properties to __________ inner sub-shells.
Q.18
Electrochemical corrosion can occur, only if __________ is present in contact with metal.
Q.19
The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.
Q.20
Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of
Q.21
The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 x 10⁻¹6⁶ m² . S⁻¹ and it is 1.94 x 10⁻¹⁴ m² S⁻¹ at 1200 K. The activation energy (in k. J.mole⁻¹ ) for the diffusion of Ni in Cu is
Q.22
Hoope's cell is predominantly used for the electrolytic refining of
Q.23
The co-ordination number in simple cubic structure is
Q.24
L.D. (Linz-Donawitz) converter is used in the production of
Q.25
Device used as a standard for the calibration of pressure gauges is a
Q.26
Hot extrusion of aluminium is done in the temperature range of __________ °C.
Q.27
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
Q.28
Hot extrusion process is not used for making
Q.29
Addition of beryllium to copper is done mainly to produce a/an __________ alloy.
Q.30
A spring material should have low
Q.31
Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?
Q.32
Alloy powder manufactured by the following process have spherical shapes.
Q.33
Steam condenser tubes are made of ad-mirability brass, in which percentage of zinc & copper are __________ respectively.
Q.34
In order to protect the aquatic creatures, the dissolved oxygen content in fresh water stream should never be less than __________ PPm.
Q.35
Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle.
Q.36
Pick the odd man out.
Q.37
Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same
Q.38
The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
Q.39
Which of the following rays has the least wavelength?
Q.40
A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².
Q.41
In __________ process, ions of salts react with water to produce acidity or alkalinity.
Q.42
Impeller & casing of centrifugal pump handling corrosive liquid and frequently running under cavitation condition is most prone to __________ corrosion.
Q.43
The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
Q.44
Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
Q.45
Pearlite comprises of
Q.46
Fire refining process is employed in case of
Q.47
Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.
Q.48
Pick out the wrong statement.
Q.49
CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the
Q.50
Plasma is
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