Cold chiesel's hammers are made of
Electrometallurgical methods of metal extraction is normally used for those metals
Pick out the correct statement
For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs.and sales price is Rs.per toy. The break even production per month will be __________ toys.
Cemented carbide tools are not suitable for cutting
For an ideal gas, Cp - Cv is
A material having good damping property is likely to have
In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be
Pick out the wrong statement:
Lowering of recrystallisation temperature of metals can be achieved by its
Ammonia gas can be dried by
Hydrogen can be
The difference between gross & net calorific values of fuel is due to the
Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.
Which of the following is not an ore of zinc?
Exposure to __________ accelarates the degradation of plastics.
During brazing, if the fluxes are entrapped, it results in the
Which of the following alloying elements when added in steel does not improve its lachinability ?
Atomic __________ is a whole number for an element.
Castability of aluminium is increased by the addition of __________ in it.
The tensile strength of plastics ranges from __________ kg/mm2.
With increase in pressure, the saturation temperature of steam
An example of a buffer solution is
Consumable electrodes are used in the __________ welding.
Which of the following is preferred for rivetting ?
Brazing filler metal used for joining steel plates
Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to
Steel produced from phosphatic iron is __________ in nature.
Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) ofmm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is __________ mm.
Largest application of laser welding is in __________ welding.
Work required for compression of a gas contained in a cylinder iskJ. During compression, heat interaction ofkJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.
__________ cycle is the most efficient thermodynamic cycle.
Addition of __________ to steel can not impart it high strength at elevated temperature.
Ceramic tips for the cutting tool are prepared from __________ powder.
'Sterilised zone' around a hazardous chemical industry is an area with __________ km radius around it, in which the total population/inhabitants should be less thanpreferably in the upwind direction.
A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C inseconds. The expected temperature of the ball after nextseconds may be about __________ °C.
Magnesium is present in
__________ wire is never used for making the heating element.
Heating the hypoeutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called
Fine grain size in metallic material will
Phosphorous is added to copper melt to
__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.
All modes of heat transfer i.e., conduction, convection & radiation occur in case of the
Which of the following is a neutral flux used in the pyrometallurgy of metal extraction?
Highest cutting speed is achieved by the __________ tool material.
Dew point of air indicates its
Out of the following, __________ waves have the largest wavelength.
Hard magnetic materials have high
Grain hardness is measured by the __________ hardness testing method.
The thermal efficiency of a heat engine giving an output of 4 KW with an input ofJoules/sec is __________ percent.
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