Chemical Process Equipment Design Mid - I, September - 2014

1.Batch operation is selected for
  • high production rate
  • low production rate
  • single product
  • good catalyst life
Answer: B
2.The _____________equation for chemical reaction states the number of molecules of reactants and products that take part
  • stoichiometric
  • rate
  • mass balance
  • heat balance
Answer: A
3.Carbon dioxide is added at the rate of 10 kg/h to an air stream. Air sampled downstream shows 0.45 % v/v carbon dioxide. If normal carbon dioxide content of air is 0.03%, the air flow rate is
  • 1000 kg/h
  • 1 kg/h
  • 1560 kg/h
  • 2560 kg/h
Answer: C
4.For thin walled pressure vessels ______________stresses can be taken as constant over the wall thickness.
  • circumferential
  • longitudinal
  • both
  • none
Answer: C
5.Radial stress will be significant for ___________ walled pressure vessels.
  • thin
  • thick
  • membrane
  • none
Answer: B
6.A cylinder is swept by the rotation of a _______ parallel to the axis of revolution.
  • cone
  • line
  • circle
  • triangle
Answer: B
7.A cylindrical storage tank can have self supported conical roof if the diameter is
  • >50m
  • >10m
  • >1m
  • >5m
Answer: A
8.The ends of the cylindrical tank can have heads of four shapes. For the same thickness choose the one which withstands the highest pressure
  • torispherical
  • hemispherical
  • flat
  • ellipsoidal
Answer: B
9.NTU method for evaluating the performance of heat exchangers has the advantage that it does not require the evaluation of
  • area
  • pressure difference
  • shell thickness
  • mean temperature difference
Answer: D
10.Typical overall coefficient for heat exchanger in which both hot and cold fluids is water is in the range of _____________ W/m2K.
  • 200-500
  • 800-1500
  • 15- 250
  • 3500-4500
Answer: B
11._________________ processes will be more economical for large-scale production.
Answer: CONTINUOUS
12._______________ theory has been found suitable in predicting the failure of ductile materials under complex loading.
Answer: Maximum strain energy theory
13.________________ of a structural member is dependent on the elastic properties of the member.
Answer: Stiffness
14.The ovality of a cylinder is measured by____________________
Answer:
15.Process and service fluids will foul the heat exchange surfaces, and the deposited material will have low _________________
Answer: Thermal conductivity
16.Fixed tube sheet exchanger has the disadvantage that it has no provision for _______________ of shell and tubes at high temperatures.
Answer: Differential expansion
17.TEMA stands for__________________
Answer: Tubular exchangers manufacturers association
18.In shell and tube heat exchanger recommended tube pitch is __________ times the outside diameter.
Answer: 1.25
19.The term “collapse coefficient” is used in the design of pressure vessels under________________
Answer: External pressure
20.Torsional shear stresses are caused by the loads __________________ from the vertical axis.
Answer: Eccentric