Related Questions
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4
In connection with corrosion of metals, passivation is the process that
A. Intensifies deterioration
B. Changes the composition of the metal
C. Inhibits further deterioration
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4
Optical activity is a/an __________ property.
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4
For an ideal gas, Cp - Cv is
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4
Which of the following phenomenon will exhibit the minimum heat transfer?
B. Forced convection in air
C. Free convection in air
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4
Lead is poured into the joints between two __________ pipes.
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4
Tesla metre per ampere (T. m/A) is the unit for the measurement of
A. Magnetic susceptibility
C. Permeability of free space
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4
Working of linear variable differential transducer (LVDT) is based on the principle of variable
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4
Upto the critical radius of insulation, added insulation, will
A. Increase the heat loss
B. Decrease heat loss and will have no effect beyond that
D. Reduce convection heat loss compared to conduction heat less
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4
The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag.
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4
The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.
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4
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
A. Small punches, broaches reamers and springs
B. Cutlery, screws, rivets and files
C. Mandrels, twist drills, small lathe tools and razors
D. Forgings like can shaft, structural steel plate, threading dies and drawing dies
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4
Plastics as a material of construction suffer from the drawback of low
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4
Lead is added to 60:40 brass primarily to improve
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4
In case of simple harmonic motion, displacement is proportional to the
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4
Faraday's law of electrolysis is related to the
B. Atomic number of the cation
C. Equivalent mass of the electrolyte
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4
An ideal material for making cooking vessels should have
C. High thermal conductivity
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4
The most important requirement for aluminium industry is the availability of cheap
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4
While the bin cards are used in the effective stores management, the queuing theory is associated with the __________ time.
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4
Which of the following heat treatment processes is usually applied to castings?
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4
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when
A. Strain rate is increased
B. Grain size is increased
C. Prior cold deformation is increased
D. Not affected by any of the above parameters
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4
Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per of steel strip.
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4
With increase in annealing temperature, the following defect density decreases.
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4
Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be
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4
The order of a chemical reaction
A. Can be determined only experimentally
B. Can be determined from the stoichiometry of the reaction
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4
Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.
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4
The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be
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4
Nusselt number/Biot number varies
A. Inversely with thermal conductivity
B. Directly with heat transfer co-efficient
C. Directly with thermal conductivity
D. Inversely with the dimension of the solid
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4
A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.
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4
Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?
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__________ wire is never used for making the heating element.