A. Conduction
B. Convection
C. Evaporation
D. Radiation
✅ The correct answer is option C.
Basic Chemical Engineering MCQs
The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then
A. Wet bulb temperature=dry bulb temperature
B. Wet bulb temperature=dew point temperature
C. Saturation temperature=dew point temperature
D. All of the above
✅ The correct answer is option D.
An abrupt and sudden fall in the readinp of barometer is an indication of the
A. Storm
B. Rain
C. Clear weather
D. Cold wave
✅ The correct answer is option A.
__________ rubber is generally used for making ‘O’ rings used for vacuum sealings.
A. Natural
B. Neoprene
C. Butadiene
D. Nitrile
✅ The correct answer is option B.
Hardening of steel is not possible, unless it is heated __________ critical point.
A. Above the highest
B. Above the lowest
C. Between the first & second
D. Between the second & third
✅ The correct answer is option B.
What is the pH of distilled water?
A. 0
B. 1
C. 7
D. 14
✅ The correct answer is option C.
The refractory lining of the bottom in a basic electric arc furnace is made of
A. Silica
B. Alumina
C. Magnesia
D. Fireclay
✅ The correct answer is option C.
In the diving apparatus, helium is used along with oxygen, because it is
A. Easily available
B. Not soluble in blood at high pressure
C. Lighter than nitrogen
D. Completely miscible with oxygen
✅ The correct answer is option B.
Dry saturated steam can be converted into superheated steam by
A. Increasing its cross-sectional area of flow
B. Passing it through a pressure reducing valve
C. Forcing it downwards through a vertical tube
D. None of these
✅ The correct answer is option B.
Impeller & casing of centrifugal pump handling corrosive liquid and frequently running under cavitation condition is most prone to __________ corrosion.
A. Uniform
B. Oxygen diffusion
C. Pitting
D. Inter-granular
✅ The correct answer is option C.