A. Nitriding
B. Hot dipping
C. Electroplating
D. Both B & C
✅ The correct answer is option D.
Basic Chemical Engineering MCQs
Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as
A. Gr0.25, Gr
B. Gr0.25, Gr0.33
C. Gr, Gr0.25
D. Gr0.33, Gr0.25
✅ The correct answer is option A.
Lead is poured into the joint between two- __________ pipes.
A. Mild steel
B. Concrete
C. Cast iron
D. Asbestos cement
✅ The correct answer is option C.
Cast iron has the unique property of high
A. Ductility
B. Damping characteristics
C. Hardness
D. Malleability
✅ The correct answer is option B.
Alloys having more than 80% copper are generally more
A. Abrasion resistant
B. Corrosion resistant
C. Prone to season cracking
D. Machinable
✅ The correct answer is option B.
‘Flare tower’ used in industry is meant for
A. Venting off (after burning) the excess inflammable/toxic gases at high pressure
B. Absorbing the pollutant gases from the furnace exhaust
C. Cooling of furnace exhaust gases
D. None of these
✅ The correct answer is option A.
Nickel is a __________ material.
A. Ferromagnetic
B. Semi-conductor
C. Paramagnetic
D. Ferroelectric
✅ The correct answer is option A.
The burnout heat flux in the nucleate boiling regime is not a function of the
A. Liquid density
B. Vapour density
C. Temperature difference
D. Heat of evaporation
✅ The correct answer is option B.
Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is
A. Black
B. Silver grey
C. Green
D. Yellow
✅ The correct answer is option B.
A spark ignition petrol engine has
A. Throttle valve
B. Carburettor
C. Both A & B
D. Neither A nor B
✅ The correct answer is option C.