Coke oven walls are lined with _____________ bricks?
A. Silica
B. Tar-dolomite
C. Low thermal conductivity
D. Fire clay
Materials and Construction
Metal at the top of the electromotive series is________________?
Metal at the top of the electromotive series is________________?
A. Least active
B. Most stable
C. Most active
D. Most noble
Hydrocyanic acid is not shipped in______________?
Hydrocyanic acid is not shipped in______________?
A. Cast iron vessels
B. Steel cylinders
C. Aluminium containers
D. Monel drums
Polythene (low or high density) containers are not corroded by___________________?
Polythene (low or high density) containers are not corroded by___________________?
A. Sulphuric acid (10%) at room temperature
B. Nitric acid (95%) at room temperature
C. Sulphur trioxide at 60°C
D. Any of these
The process of coating steel sheets by zinc to improve its corrosion resistance is called___________________?
The process of coating steel sheets by zinc to improve its corrosion resistance is called___________________?
A. Calorising
B. Galvanising
C. Zincification
D. Tempering
Trough of an apron conveyor is made of___________________?
Trough of an apron conveyor is made of___________________?
A. Lead lined concrete vessel
B. Wood
C. Metal
D. Either B. or C.
Maximum consumption of copper is in__________________?
Maximum consumption of copper is in__________________?
A. Utensil manufacture
B. Electrical industry
C. Industrial equipment manufacture
D. Small scale industries
Carbon supply in pack carburising process is in the form of_____________________?
Carbon supply in pack carburising process is in the form of_____________________?
A. Charcoal
B. Calcium carbide
C. Hydrocarbon oil
D. Graphite
Cast iron vessels are not suitable for the storage of_________________?
Cast iron vessels are not suitable for the storage of_________________?
A. Freon
B. H2SO4 (95%) at room temperature
C. H2SO4 (fuming)
D. Wet SO2
Which has the maximum melting point out of the following ?
Which has the maximum melting point out of the following ?
A. Steel
B. Cast iron
C. Stainless steel
D. Wrought iron