High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature ofto 27°C with relative humidity ranging from __________ percent.
For the running of power generating turbines, the steam used should be
Pick out the correct statement about the condensation.
In hot working, dynamic recovery occurs in
Dezincification is a form of corrosion, which specifically applies to
Basicity [%Cao + %MgO/% SiO2) of the slag in Indian blast furnace is in the range of
Normalising does not __________ of a metal.
Good design of the casing of a centrifugal pump aims at minimising the
An "orange peel" effect is observed
In an isochoric process,
Even minute presence of impurities in copper impairs its electrical conductivity seriously. Electrolytic refinning of blister copper is resorted to, when
No cutting fluid is normally used, while machining
Rate of chemical reaction is not much affected, if the reactants are in __________ form.
The product of a commercial direct reduction process is
Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs.
Which of the following forces does not act on a fluid at rest ?
Work study deals with the __________ study.
Pick out the wrong statement about nucleate boiling.
Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used ?
Creep consideration is the most important in case of the
Change in volume of metals from absolute zero temperature to their melting points is
Which of the following manufacturing processes produces the strongest components ?
Water hammer in pipelines results, when the flowing fluid
Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution
Which of the following is a disaccharide?
Materials used for making permanent magnets containing iron and nickel are made by __________ technique.
Lubrication is done to control
In the diving apparatus, helium is used along with oxygen, because it is
Density in the solid state is slightly less than that in its liquid state, in case of
Maximum change in the hardness of mar tensite occurs in the carbon content range of __________ percent in steel.
L.D. (Linz-Donawitz) converter is used in the production of
__________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
The diffusion co-efficient of Ni in Cu atK is 1.x 10-16 m2 . S-1 and it is 1.x 10-14 m2 S-1 atK. The activation energy (in k. J.mole-1 ) for the diffusion of Ni in Cu is
Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.
Alloy powder manufactured by the following process have spherical shapes.
Cast iron compared to steel is better in
The preferred alloying element for low temperature applications of steel is
Materials having resistivity ranging from 1 toohm. cm is termed as
Plasma is
Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.
__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
Knocking tendency in a petrol engine decreases with increasing
Hooke's law
Turning/machining of __________ usually does not require any cutting fluid.
Powder metallurgy processing can be used for making
Heat release during phase change is observed in case of a/an
During sensible cooling of air, its wet bulb temperature
At room temperature, F.C.C. crystal structure is observed in
In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.