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Chemical Engineering Basics

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in _______________ electrons ?

Chemical Engineering Basics /
A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in _______________ electrons ?

A. Lack of free
B. Excess of
C. Decrease in
D. None of these

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in _______________ electrons ? Read More »

Chemical Engineering Basics

In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be__________________?

Chemical Engineering Basics /
In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be__________________?

A. Conduction
B. Radiation
C. Natural convection
D. Forced convection

In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be__________________? Read More »

Chemical Engineering Basics

Pick out the wrong statement about coating/electroplating of metals ?

Chemical Engineering Basics /
Pick out the wrong statement about coating/electroplating of metals ?

A. Phosphate coating is used as an excellent base for paints & enamels
B. Phosphate coating is less corrosion resistant than chromate coating
C. The base metal to be electroplated is normally made the cathode of the electrolytic cell and
coating metal is made the anode
D. Calorising is the process of coating steel with chromium

Pick out the wrong statement about coating/electroplating of metals ? Read More »

Chemical Engineering Basics

In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?

Chemical Engineering Basics /
In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?

A. Mechanical
B. Overall
C. Volumetric
D. Impeller

In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)? Read More »

Chemical Engineering Basics