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.
Engineering MCQs
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.
Which of the following is the most effective inhibitor of grain growth, when added in small quantity in steel ?
A. Manganese
B. Vanadium
C. Cobalt
D. Copper
✅ The correct answer is option B.
Saturated steam at a pressure of 25 kg/cm² is throttled to attain 5 kg/cm² . Then the outcoming steam will be
A. Wet
B. Saturated
C. Superheated
D. None of these
✅ The correct answer is option C.
The dew point of moist air becomes __________ with decrease in its relative humidity.
A. Less than the wet bulb temperature
B. More than the wet bulb temperature
C. More than the dry bulb temperature
D. Equal to wet bulb temperature
✅ The correct answer is option A.
Matte smelting is used in the extraction of
A. Lead
B. Zinc
C. Aluminium
D. Copper
✅ The correct answer is option D.
Nitriding of steel is a process for
A. Case hardening
B. Spheroidising
C. Normalising
D. Annealing
✅ The correct answer is option A.