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.Management Sciences
Category: CHEMICAL ENGINEERING
Concentration of sulphide ores is done usually by____________________?
A. Roasting
B. Smelting
C. Froth floatation
D. Electromagnetic separation
Zeolite used in water softening process (cation exchange) is regenerated by washing with___________________?
A. Brine
B. Chloramines
C. Sodium bisulphite
D. Liquid chlorines
Pick out the correct statement?
A. Stainless steel is nothing but chromium coated steel
B. Hardening of a soft metal can be done by alloying it with another metal or non-metal
C. Plastic deformation of a material is its temporary distortion under the action of applied stress
D. Rusting of iron is not electrochemical in nature
Blast furnace gas burns with a bluish flame, because of the presence of____________________?
A. CO
B. CH4
C. CO2
D. S
In SI units, fouling factor is expressed in __________________?
A. m2°K/W
B. W/m2°K
C. m2°K
D. m°K/W
Dilatometer is used for the determination of ______________ of refractories?
A. Modulus of rupture
B. Permanent linear change
C. Resistance to CO attack
D. RUL
Lead pipes are not safe for carrying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2. Lead pipes are readily corroded by___________________?
A. Dilute HCl
B. Acetic acid
C. Concentrated H2SO4
D. None of these
Which of the following reactors is operated at high neutron flux and low power level ?
A. Breeder reactor
B. Research reactor
C. Heterogeneous reactor
D. Liquid metal (e.g., molten sodium) cooled reactor
In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is _____________ the outlet temperature of the cold fluid?
A. Equal to
B. More than
C. Less than
D. Either more or less than (depending upon the fluid)
If a1 and a2 are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement ?
A. a1 = a2
B. a1 = 2a2
C. a1 = 0.5 a2
D. None of these
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