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.Management Sciences
Category: Materials and Construction
Sulphur melting pit in the sulphuric acid plant is made of__________________?
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A. Lead lined stainless steel
B. Cast iron
C. Steel or cement-brick lined
D. Hard wood
Rotary kilns in cement industry are lined with _____________bricks?
A. Fireclay
B. Silica
C. Lead
D. High alumina & high magnesia
Fermenter used in the production of penicillin by deep fermentation process is a ______________ lined steel vessel ?
A. Rubber
B. Monel
C. Glass
D. Nickel
Galvanised iron is___________________?
A. Harder
B. Protected from rusting
C. Alumina coated iron
D. None of these
Which one occupies the lowermost position in the electromotive series of metals ?
A. Aluminium
B. Noble metals (Ag, Pt, Au)
C. Zinc
D. Alkali metals (K, Na, Li)
The carbonating tower used in Solvay process of soda ash manufacture is made of_________________?
A. Cast iron
B. Stainless steel
C. Karbate
D. Lead lined steel
Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70% ?
A. Cast iron
B. Steel
C. Nickel
D. Karbate
Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system ?
A. High silicon iron, silicon rubber, Kel-F and Teflon
B. Mild steel and stainless steel
C. Cast iron, tin and aluminium
D. Copper, nickel and Monel
‘Semi steel’ is__________________?
A. Produced by adding 10-20% steel to the cupola charge
B. Stronger than cast iron
C. Both A. and B.
D. Neither A. nor B.
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