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.Management Sciences
Category: Chemical Engineering Basics
Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the ______________ temperature of air?
A. Wet bulb
B. Dry bulb
C. Saturation
D. Dew point
Bad odour in sanitary latrines is reduced by periodically sprinkling_____________________?
A. Bleaching powder
B. Lime powder
C. Aluminium sulphate
D. None of these
_____________________ of grey cast iron produces white cast iron?
A. Tempering
B. Rapid heating
C. Rapid cooling
D. Slow cooling
Materials having resistivity ranging from 1 to 100 ohm. cm is termed as___________________?
A. Conductor
B. Insulator
C. Semi-conductor
D. None of these
_____________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C ?
A. Borosilicate
B. High silica
C. Supermax
D. Lead
Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of ________________?
A. Paper
B. Cloth
C. Lead
D. Aluminium
Pick out the wrong statement?
A. Ductile fracture of a stressed material, which exhibits a large plastic deformation is commonly
caused by the formation and coalescence of voids in the necked region
B. Brittle fracture is caused by the propagation of pre-existing cracks in the material and involves minimum plastic deformation
C. Fatigue fracture of a material is always brittle in nature and takes place due to the existence of
line imperfections
D. Brittle materials are generally tested in tension
Hardening of steel is not possible, unless it is heated _________________ critical point ?
A. Above the highest
B. Above the lowest
C. Between the first & second
D. Between the second & third
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