Hydrochloric acid is stored in a ________________vessel?
A. Lead lined steel
B. Rubber lined steel
C. Stainless steel
D. Cast iron
Materials and Construction
The chlorinator used in the manufacture of DDT is made of___________________?
The chlorinator used in the manufacture of DDT is made of___________________?
A. Glass
B. Glass lined steel
C. Teflon
D. Bakelite
__________________ does not contain copper as an alloying element?
__________________ does not contain copper as an alloying element?
A. Nichrome
B. Manganin
C. Perminvar
D. Monel metal
In SO3 absorber (Contact Process), packing material used is of________________?
In SO3 absorber (Contact Process), packing material used is of________________?
A. Cast iron
B. Chemical stoneware
C. Karbate
D. Mild steel
Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its__________________?
Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its__________________?
A. Corrosion resistance
B. Tensile strength
C. Machinability
D. Compressive strength
Bearings subjected to light load are made of________________?
Bearings subjected to light load are made of________________?
A. White metal
B. Phosphorous bronze
C. Monel
D. Silicon bronze
With increase in the carbon percentage in the steel, its__________________?
With increase in the carbon percentage in the steel, its__________________?
A. Hardness increases
B. Ductility reduces
C. Tensile strength increases
D. All A., B. and C.
To improve the machinability of steel by its softening, it is subjected to __________________?
To improve the machinability of steel by its softening, it is subjected to __________________?
A. Cold working
B. Annealing
C. Shot blasting
D. Heating
Bog iron used for the adsorption of H2S from coke oven gas is___________________?
Bog iron used for the adsorption of H2S from coke oven gas is___________________?
A. An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)
B. Iron impregnated with resin (usually Bakelite)
C. Carbon free iron
D. None of these
The specific gravity of coal depends mainly on its ______________ content?
The specific gravity of coal depends mainly on its ______________ content?
A. Carbon
B. Volatile matter
C. Ash
D. Moisture