201. Length to diameter ratio of most rotary driers is in the range of
1 to 2
4 to 10
10 to 20
20 to 30
✅ The correct answer is option B.
Process Equipment and Plant Design MCQs
202. A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult’s Law.
positive
negative
no
none of these
✅ The correct answer is option B.
203. The minimum baffle height should be
equal to the impeller diameter.
twice the impeller diameter.
twice the tank diameter.
3/4 of the tank height.
✅ The correct answer is option B.
204. Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.
less than
more than
same as
either more or less (depending upon relative volatility)
✅ The correct answer is option B.
205. The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is
0.25
0.5
0.75
1.25
✅ The correct answer is option A.
206. Pressure drop due to pipe fittings can be estimated by the equation, , where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (dimensionless) for 45° elbow and 180° close return bends would be respectively around
5 and 10
45 and 75
180 and 300
300 and 500
✅ The correct answer is option B.
207. Pick out the wrong statement. In an agitated vertical cylinderical reaction vessel, the
ratio of liquid depth to tank diameter (i.e. the filling ratio) recommended for most purposes is 1.
filling ratio for dispersing gas in a liquid is 2 for sufficiently long contact period.
flat bottom and conical bottom vessels have low agitation efficiency for agitation of heavy solids in liquids.
dished bottom vessel has very high power consumption.
✅ The correct answer is option D.
208. Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is
more
same
less
twice
✅ The correct answer is option C.
209. A pipe is generally made of circular cross-section, because a circular cross-section has the
higher structural strength.
lowest surface area requirement for a given volume.
both (a) & (b).
none of these.
✅ The correct answer is option C.
210. Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower ?
Size, shape, orientation and surface of the packing particles.
Density and viscosity of fluids.
Fluid flow rates.
All (a), (b) and (c).
✅ The correct answer is option D.