Related Questions

Galvanised iron is
A Harder
B Protected from rusting
C Alumina coated iron
D None of these
Galvanized Iron sheets have a coating of ----
A Tin
B Lead
C Zinc
D Chromium
Iron is prevented from rusting by coating with zinc. This process is called as
A Galvanisation
B Corrosion
C Sublimation
D Reduction
The coating of a thin layer of zinc on steel or iron objects is known as
A Hot dipping
B Tinning
C Galvanising
D Electroplating
Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is
A Reduced preferentially
B Cheaper
C Oxidised preferentially
D Lighter
Rexin (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten
A Teflon
B Bakelite
C SBR
D PVC
How many iron rods, each of length 7 m and diameter 2 cm can be made out of 0.88 m3 of iron?
A 400
B 200
C 300
D 100
The aquadag coating on the inside of PPI tube is used
A To focus the beam of primary electrons
B To shield the electron beam from unidirectional magnetic
C As a second anode and to prevent the build-up of secondary field
D All of these
Copper substances when exposed to air gains a green coating due to the formation of:
A CuO
B CuCO3 Cu(OH)2
C CuSO4
D Cu(NO3)2
A coating of dust on a computer's main circuit boards has this probable consequence
A Overheating
B Short circuits
C Slower hard disk
D None

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