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.Management Sciences
Category: Chemical Engineering Basics
Wavelength of radiation emitted by a body depends on the ________________ of its surface?
A. Temperature
B. Area
C. Nature
D. All ‘A’, ‘B’ & ‘C’
Steels with high carbon equivalent have poor Weldability, because in these steels during welding________________?
A. Carbon and other alloying elements get oxidised from the weld pool
B. Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
C. Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
D. Segregation of carbon and other element occurs in the weld pool leading to poor properties of
the weld
Heat release during phase change is observed in case of a/an_________________?
A. Boiler
B. Condenser
C. Evaporator
D. All A. B. & C.
All of the following alloying elements of steel increases hardness but sacrifice ductility, except________________?
A. Nickel
B. Vanadium
C. Molybdenum
D. Chromium
Nusselt number/Biot number varies___________________?
A. Inversely with thermal conductivity
B. Directly with heat transfer co-efficient
C. Directly with thermal conductivity
D. Inversely with the dimension of the solid
In connection with corrosion of metals, passivation is the process that__________________?
A. Intensifies deterioration
B. Changes the composition of the metal
C. Inhibits further deterioration
D. None of these
Mild steel has _______________ crystal lattice structure?
A. Face centred cubic (fcc)
B. Body centred cubic (bcc)
C. Orthorhombic
D. Cubic
The best guide to judge the general quality of water is the measurement of its__________________?
A. pH value
B. Electrical conductivity
C. Turbidity
D. Dissolved oxygen content
When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the _________________?
A. Partial pressure of water vapour is less than the total pressure
B. Humidity is < 100% & dew point temperature of air has not reached
C. Dew point temperature of air has not reached & air is not saturated fully
D. Air is fully saturated
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