Speed of the fan
Damper
Variation in the pitch of the fan blades
All of the above
✅ The correct answer is option D.
Chemical Engineering MCQs
For every 10% increase in the excess air; the fuel consumption increases by __________ percent.
0.1
2
5
10
✅ The correct answer is option A.
Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the
Decolourisation of sugar
Solvent recovery from air and gases
Absorption of gases and vapor
Electrode manufacture
✅ The correct answer is option D.
Deoiling is the process of removal of oil from wax. It is done by the __________ process.
solvent extraction
sweating
resettling
all (a), (b) & (c)
✅ The correct answer is option D.
Which is the heaviest fuel gas out of the following?
Blast furnace gas
Coke oven gas
Water gas
Carburetted water gas
✅ The correct answer is option A.
Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely mis-cible. It means that the aniline point of the diesel is __________ the room temperature.
more than
less than
same as
either more or less; depends on the room temperature
✅ The correct answer is option C.
Indirect contact heat exchangers are preferred over direct contact heat exchangers, because
Heat transfer co-efficient are high
There is no risk of contamination
There is no mist formation
Cost of equipment is lower
✅ The correct answer is option B.
In a forward feed multiple effect, the pressure build up will be
Least at the inlet of the first effect
Least at the outlet of the last effect
Highest at the inlet of the last effect
Highest at the outlet of the last effect
✅ The correct answer is option B.
Crude oil is subjected to vacuum distillation in the last stage, because
high boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose.
lighter/low boiling products are prone to thermal decomposition.
high purity products can be obtained thereby.
none of these.
✅ The correct answer is option A.
Road grade bitumen is produced from vacuum residue by its
aeration
pyrolysis
hydrogenation
steam reforming
✅ The correct answer is option D.