Related Questions

What is the method of brazing used to join relatively small assemblies made from materials that either do not oxidize at the brazing temperature or can be protected from oxidation with a flux?
A Torch brazing
B Dip brazing
C Resistance brazing
D Furnace brazing
Brazing is the joining of metals
A Without melting the base metal
B With a non-ferrous filler
C Both A & B
D Neither A nor B
During brazing, if the fluxes are entrapped, it results in the
A Distortion of brazed joints
B Cracking of joints
C Presence of gas pockets
D Corrosion
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
To measure the flux, devices used are based on
A Voltaic effect
B Piezo-electric effect
C Hall effect
D Photo-voltaic effect
A moving-coil permanent-magnet instrument can be used as flux meter
A by using a low resistance shunt
B by using a high series resistance
C by eliminating the control springs
D by making control springs of large moment of inertia
_______ is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ?
A Grey cast-iron
B Cast steel
C High carbon steel
D Stainless steel
In series motor which of the following methods can be used for changing the flux per pole?
A Tapped field control
B Diverter field control
C Series-parallel control
D Any of the above

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