The bank of tubes located at the back of the domestic refrigerators are the _______________ tubes?
A. Refrigerant cooling
B. Evaporator
C. Condenser
D. Throttling
Chemical Engineering Basics
Mho’s scale of hardness, which consists of 10 standard minerals is used for the measurement of _______________ hardness?
Mho’s scale of hardness, which consists of 10 standard minerals is used for the measurement of _______________ hardness?
A. Scratch
B. Indentation
C. Dynamic
D. Rebound
Electrometallurgy is not involved in the extraction of ___________________ from its ore?
Electrometallurgy is not involved in the extraction of ___________________ from its ore?
A. Aluminium
B. Tin
C. Lead
D. Both B. & C.
Screws are specified by their _____________ diameters?
Screws are specified by their _____________ diameters?
A. Minor
B. Major
C. Pitch
D. None of these
Cupola produces _________________ iron?
Cupola produces _________________ iron?
A. Pig
B. Cast
C. Wrought
D. Carbon free
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 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
In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be__________________?
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
Pick out the wrong statement about coating/electroplating of metals ?
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
Nusselt number/Biot number varies___________________?
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 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)?
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