Related Questions

The usual composition of a soldering alloy is
A Tin, lead and small percentage of antimony
B Tin and lead
C Tin, lead and silver
D Tin and copper
Soldering of two metals is possible because of the property of :
A Viscosity
B Osmosis
C Cohesion
D Surface tension
Temperature attained in soldering of metals is about __________ °C.
A 150-300
B 400-500
C 650-800
D 1000-1100
The joint for soldering is supported by binding wire made of
A Mild steel
B Copper
C Soft iron
D Stainless steel
Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
A Convection becomes important
B Conduction becomes important
C Radiation becomes important
D Sub-cooled boiling occurs
In a particular type of welding, flux is prepared in the form of a coarse powder and granulated flux is spread over the joint. What is this type of welding process called?
A Electric arc welding
B Submerged arc welding
C MIG welding
D TIG welding
Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore?
A Silica
B Lime
C Alumina
D Fluorite
Flux addition during smelting of ore is done to
A Remove impurities/gangue
B Enhance rate of reaction
C Accelerate reduction of ore
D Separate slag from metal
In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position.
A Globular transfer
B Spray transfer
C GMAW practice
D Dip transfer
Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
A Ozone and iodine
B Chlorine or its compounds
C Ultraviolet light for irradiation of water
D All of the above

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