27 + Interview Questions in Packing Design And Operation in Distillation Design Page 1 InterviewSolution

1.	Fs is denoted as?(a) Capacity parameter(b) Final storage(c) Full standup(d) Finishing StandupI got this question in unit test.This intriguing question comes from Packing Material in portion Packing Design and Operation of Distillation Design
Answer» CORRECT option is (a) CAPACITY parameter The explanation is: Plot of dP vs. FS, it may be noted that quantity Fs is ALSO taken as a measure when pg<

Discussion

2.	The packing factor used to be taken as?(a) ap/e^3(b) ap/e^2(c) ap^2/e^2(d) ap^3/e^4I have been asked this question at a job interview.Enquiry is from Packing Material in portion Packing Design and Operation of Distillation Design
Answer» The correct option is (a) ap/e^3 To explain I would say: The packing factor is taken as to be ap/e^3, where ap= SURFACE of the packing PER unit VOLUME and e = VOID fraction of the packed bed.

Discussion

3.	The shells are generally made of?(a) Copper(b) Iron(c) Wood(d) CeramicsI have been asked this question during an online interview.This question is from Packing Types and Objectives in section Packing Design and Operation of Distillation Design
Answer» Right choice is (d) Ceramics To explain: The CERAMIC SHELLS are generally used that to having a bell and spigot joint are used in highly CORROSIVE services, such as HNO3 by DISTILLATION.

Discussion

4.	Sluzer supply are of which three types?(a) AX,CX and CV(b) AY,BX and CX(c) AY,CX and BX(d) AX,BX and CYI got this question in an internship interview.I'm obligated to ask this question of Types of Random Packing topic in portion Packing Design and Operation of Distillation Design
Answer» Right answer is (d) AX,BX and CY Best EXPLANATION: Sluzer supply are of three types MARKED as AX,BX and CY, the packing elements are made of corrugated LAYERS of mesh.

Discussion

5.	For liquid and solid handling, that are corrosive the(a) Bubble tower is used(b) Venturi Scrubber is used(c) Spray tower is used(d) Agitated vessel are usedI have been asked this question during an online exam.This intriguing question originated from Packing Types and Objectives topic in portion Packing Design and Operation of Distillation Design
Answer» Correct answer is (C) Spray TOWER is used The best I can explain: Spray towers are generally used for the corrosive liquid and gases WHEREAS it also provides the application in the liquid-liquid EXTRACTION.

Discussion

6.	Minimum liquid rate for random packing is reported as?(a) 10-14 gpm/ft^2(b) 8-10 gpm/ft^2(c) 1-9 gpm/ft^2(d) 0.5-2 gpm/ft^2I have been asked this question in exam.I'd like to ask this question from Packing Material topic in division Packing Design and Operation of Distillation Design
Answer» Correct CHOICE is (d) 0.5-2 gpm/ft^2 The explanation: Minimum LIQUID rate for random PACKING is reported as 0.5-2 gpm/ft^2 and for STRUCTURED packing is 0.1-0.2 gpm/ft^2.

Discussion

7.	The Height to Diameter ratio of CMR is?(a) 1:1(b) 1:3(c) 3:1(d) 1:5This question was addressed to me in an online quiz.This interesting question is from Types of Random Packing in division Packing Design and Operation of Distillation Design
Answer» RIGHT answer is (b) 1:3 To elaborate: CMR is SIMILAR to the pall ring but has a HEIGHT to DIAMETER ratio this is sometimes called the ‘aspect ratio’ of 1:3 compared to 1:1 latter.

Discussion

8.	Bubble columns, are used for?(a) Waste water treatment(b) Effluent treatment(c) Chlorine treatment(d) Sodium treatmentThe question was asked in a job interview.The question is from Packing Types and Objectives in portion Packing Design and Operation of Distillation Design
Answer» RIGHT OPTION is (a) Waste water treatment To explain: The main use of bubble column are the aerobic FERMENTERS and are secondarily used a waste water treatment while for chlorine and SODIUM treatment are done in an AGITATED vessel.

Discussion

9.	A layer of packing above the liquid distributor is called?(a) Dry packing(b) Wet packing(c) Can packing(d) Trump packingThe question was asked in homework.This intriguing question comes from Packing Material topic in portion Packing Design and Operation of Distillation Design
Answer» CORRECT answer is (a) Dry PACKING The explanation is: A layer PUT above the liquid distributor is CALLED dry packing, which acts as an entrainment eliminator, to remove the entrainment liquid DROPLETS.

Discussion

10.	The Eckert chart contains a parameter FP which is called?(a) Pushing factor(b) Possibility factor(c) Praining factor(d) Packing factorThis question was addressed to me in homework.The above asked question is from Packing Material topic in portion Packing Design and Operation of Distillation Design
Answer» Right CHOICE is (d) PACKING factor Easy explanation: A parameter P that CHARACTERISTICS the packing and is called as packing factor, originally introduced by Lobo in 1945, also represented as CF.

Discussion

11.	Flooding, frothing, entrainment are the three main phenomena limiting the tray capacity.(a) True(b) FalseI have been asked this question during a job interview.Origin of the question is Packing Types and Objectives in section Packing Design and Operation of Distillation Design
Answer» CORRECT option is (a) True Best EXPLANATION: A tray has THREE zonesthat functions i.e. the ACTIVE area, the vapor space and the down comer area, these three PHENOMENA can disturb all three places respectively.

Discussion

12.	The abbreviation IMTP represents?(a) Intermediate Metal Thrus Packing(b) Inverse Metal Tertiary Packing(c) Intalox Metal Tower Packing(d) Indian Metal Tower PackingThe question was posed to me in an interview for internship.The origin of the question is Types of Random Packing in portion Packing Design and Operation of Distillation Design
Answer» CORRECT choice is (c) Intalox Metal Tower PACKING Easy EXPLANATION: The Inverse Metal Tertiary Packing, a random packing developed of surface area of a PALL ring and the aerodynamic shape of the Intalox saddle.

Discussion

13.	The flow of vapor liquid in the same direction is defined as?(a) Dual flo(b) Co-flo(c) Comer flo(d) Coal floThis question was posed to me in an online interview.This key question is from Packing Types and Objectives in chapter Packing Design and Operation of Distillation Design
Answer» The correct answer is (b) Co-flo To elaborate: The Jaeger co-flo is BASED on the novel IDEA, the VAPOR flows through the tray deck and carries the liquid droplets to a COALESCER placed between TWO plates.

Discussion

14.	The dry bed pressure drop can be calculated using?(a) Ergun’s Equation.(b) Fenske’s Equation(c) Bessel’s Equation(d) Barnaul’s EquationI got this question in an online interview.I'm obligated to ask this question of Packing Material topic in division Packing Design and Operation of Distillation Design
Answer» The CORRECT choice is (a) Ergun’s Equation. For explanation I would say: The Ergun’s equation can be USED using the pressure drop calculation for all the PACKED towers and other equipment’s that use packings.

Discussion

15.	The carbon steel has the wall thickness and void age of?(a) ½ inch and 92%(b) 1/8 inch and 74%(c) 2/3 inch and 70%(d) ¼ inch and 50%I have been asked this question during an online exam.Question is taken from Packing Types and Objectives in section Packing Design and Operation of Distillation Design
Answer» Right answer is (a) ½ inch and 92% For EXPLANATION: The carbon steel PACKING’s have ½ inch and 92% void age WHEREAS the Raschig rings have 1/8 inch diameter and 74% void age AVAILABLE.

Discussion

16.	Liquid remaining in unit volume of bed after bed is drained is?(a) Final holdup(b) Total holdup(c) Static holdup(d) Full holdupI had been asked this question in an internship interview.The query is from Packing Material in division Packing Design and Operation of Distillation Design
Answer» The correct choice is (c) Static holdup The EXPLANATION: It is the liquid remaining in UNIT volume of the bed after the bed is DRAINED for a REASONABLE time, it is pretty SMALL compared to total holdup.

Discussion

17.	The first structured packing was called as?(a) Panapak(b) Mellapak(c) Conapak(d) SigmapakI got this question in quiz.My doubt is from Types of Random Packing topic in portion Packing Design and Operation of Distillation Design
Answer» Right ANSWER is (a) Panapak To elaborate: Panapak was made from thin METAL strips to form a honeycomb like structure did not gain MUCH POPULARITY because of SEVERE maldistribution of liquid.

Discussion

18.	The difference between the total hold up and the static holdup is called?(a) Static holdup(b) Operating holdup(c) Dynamic holdup(d) Full holdupThis question was addressed to me by my college professor while I was bunking the class.This interesting question is from Packing Material in division Packing Design and Operation of Distillation Design
Answer» The CORRECT choice is (b) Operating holdup For explanation: The DIFFERENCE between the TOTAL HOLD up and the static holdup is called Operating holdup and SOMETIMES is also refereed as dynamic holdup.

Discussion

19.	The phenomena of the flowing of liquid towards the wall of tower and dispersed in lateral direction is called as?(a) Channeling(b) Flow casting(c) Entraining(d) RegimensI have been asked this question during an interview for a job.This is a very interesting question from Types of Random Packing in portion Packing Design and Operation of Distillation Design
Answer» RIGHT option is (a) CHANNELING For explanation I would say: This is called as channeling of LIQUID, such misdistribution is determined to a good gas liquid contact, therefore NECESSARY to collect liquid from wall and give it to BED again.

Discussion

20.	Mellacarbon packing have a surface area of nearly _______(a) 500 – 600 m^2/m^3(b) 800 – 1000 m^2/m^3(c) 125 – 700 m^2/m^3(d) 300 – 900 m^2/m^3I had been asked this question during an online interview.The above asked question is from Types of Random Packing topic in division Packing Design and Operation of Distillation Design
Answer» Correct answer is (C) 125 – 700 m^2/m^3 Easiest explanation: Mellacarbon packing have a surface area of 125 – 700 m^2/m^3 and a high THERMAL stability of 400^o C also EXCELLENT wettability in aqueous SYSTEMS.

Discussion

21.	The MWR stands for?(a) Maximum Working Rate(b) Mixed Working Rate(c) Minimum Wetting Rate(d) Mega Weeping RateThis question was posed to me during an interview.This interesting question is from Packing Material topic in portion Packing Design and Operation of Distillation Design
Answer» Right option is (a) MAXIMUM Working Rate Easy EXPLANATION: It is the LIQUID throughput below the film packing surface BREAKS up reducing the WETTED area.

Discussion

22.	The corrugation angle of sheets varies from(a) 28 to 45^o(b) 30 to 45^o(c) 90 to 120^o(d) 55 to 67^oI have been asked this question by my school principal while I was bunking the class.My doubt stems from Types of Random Packing topic in division Packing Design and Operation of Distillation Design
Answer» CORRECT option is (a) 28 to 45^o Best explanation: The CORRUGATION angle of sheets VARIES from 28 to 45^o. Perforations are sometimes between the two surfaces of channels of communication between the two surfaces.

Discussion

23.	Pressure drops per theoretical stage of Mellapak packing’s are?(a) 1.0 to 2.1 mbar(b) 0.3 to 1.0 mbar(c) 2.3 to 1.2 mbar(d) 5.6 to 7.3 mbarThe question was posed to me in an online quiz.My query is from Types of Random Packing topic in section Packing Design and Operation of Distillation Design
Answer» Correct option is (b) 0.3 to 1.0 MBAR The explanation is: Pressure drop PER theoretical stage is 0.3‑1.0 mbar and the pressure drop at 70‑80% flooding about 2 mbar/m while MINIMUM liquid load approx. is 0.2 m^3/m^2h.

Discussion

24.	The modern packing, that is most commonly used in the columns are?(a) Norton Hy-Pak(b) Flexirings(c) Berl Saddle(d) Pall ringThe question was asked during an interview for a job.I'm obligated to ask this question of Packing Types and Objectives in section Packing Design and Operation of Distillation Design
Answer» Right choice is (c) Berl Saddle Explanation: The Berl saddle is first modern packing developed in the LATE 1930S, it is CALLED so because of its shape of saddle.

Discussion

25.	Gauze packing’s have an F-factor of?(a) 2-2.5√Pa(b) 5 √Pa(c) 1-2.5 √Pa(d) 1-2√PaThe question was asked in exam.This interesting question is from Types of Random Packing in chapter Packing Design and Operation of Distillation Design
Answer» The correct option is (c) 1-2.5 √Pa For EXPLANATION I would say: GAUZE packing’s have an F-factor of 1‑ 2.5 √Pa with pressure drop per theoretical STAGE as 0.1 – 0.5 mbar.

Discussion

26.	Which of the following is the oldest type of the tower packing?(a) Asbestos(b) Raschig rings(c) Wood(d) PVCI have been asked this question in an online quiz.Query is from Packing Types and Objectives in chapter Packing Design and Operation of Distillation Design
Answer» The correct choice is (b) Raschig rings Explanation: This is the OLDEST type of the tower packing INTRODUCED by the GERMAN chemist F. Raschig in 1907, it is a hollow CYLINDER having equal diameter to its length.

Discussion

27.	The Venturi Scrubber operates on velocity as high as?(a) 250 ft/s(b) 100 ft/s(c) 200 ft/s(d) 150 ft/sThis question was addressed to me in final exam.This intriguing question originated from Packing Types and Objectives topic in portion Packing Design and Operation of Distillation Design
Answer» The correct CHOICE is (a) 250 ft/s Easy explanation: The GAS is accelerated to a very high SPEED of 250 ft/s, the high speed gas ATOMIZES the FEED liquid causing impaction of dust particles.

Discussion

Explore topic-wise InterviewSolutions in .

Fs is denoted as?(a) Capacity parameter(b) Final storage(c) Full standup(d) Finishing StandupI got this question in unit test.This intriguing question comes from Packing Material in portion Packing Design and Operation of Distillation Design

The packing factor used to be taken as?(a) ap/e^3(b) ap/e^2(c) ap^2/e^2(d) ap^3/e^4I have been asked this question at a job interview.Enquiry is from Packing Material in portion Packing Design and Operation of Distillation Design

The shells are generally made of?(a) Copper(b) Iron(c) Wood(d) CeramicsI have been asked this question during an online interview.This question is from Packing Types and Objectives in section Packing Design and Operation of Distillation Design

Sluzer supply are of which three types?(a) AX,CX and CV(b) AY,BX and CX(c) AY,CX and BX(d) AX,BX and CYI got this question in an internship interview.I'm obligated to ask this question of Types of Random Packing topic in portion Packing Design and Operation of Distillation Design

Minimum liquid rate for random packing is reported as?(a) 10-14 gpm/ft^2(b) 8-10 gpm/ft^2(c) 1-9 gpm/ft^2(d) 0.5-2 gpm/ft^2I have been asked this question in exam.I'd like to ask this question from Packing Material topic in division Packing Design and Operation of Distillation Design

The Height to Diameter ratio of CMR is?(a) 1:1(b) 1:3(c) 3:1(d) 1:5This question was addressed to me in an online quiz.This interesting question is from Types of Random Packing in division Packing Design and Operation of Distillation Design

Bubble columns, are used for?(a) Waste water treatment(b) Effluent treatment(c) Chlorine treatment(d) Sodium treatmentThe question was asked in a job interview.The question is from Packing Types and Objectives in portion Packing Design and Operation of Distillation Design

A layer of packing above the liquid distributor is called?(a) Dry packing(b) Wet packing(c) Can packing(d) Trump packingThe question was asked in homework.This intriguing question comes from Packing Material topic in portion Packing Design and Operation of Distillation Design

The Eckert chart contains a parameter FP which is called?(a) Pushing factor(b) Possibility factor(c) Praining factor(d) Packing factorThis question was addressed to me in homework.The above asked question is from Packing Material topic in portion Packing Design and Operation of Distillation Design

Flooding, frothing, entrainment are the three main phenomena limiting the tray capacity.(a) True(b) FalseI have been asked this question during a job interview.Origin of the question is Packing Types and Objectives in section Packing Design and Operation of Distillation Design

The flow of vapor liquid in the same direction is defined as?(a) Dual flo(b) Co-flo(c) Comer flo(d) Coal floThis question was posed to me in an online interview.This key question is from Packing Types and Objectives in chapter Packing Design and Operation of Distillation Design

Liquid remaining in unit volume of bed after bed is drained is?(a) Final holdup(b) Total holdup(c) Static holdup(d) Full holdupI had been asked this question in an internship interview.The query is from Packing Material in division Packing Design and Operation of Distillation Design

The first structured packing was called as?(a) Panapak(b) Mellapak(c) Conapak(d) SigmapakI got this question in quiz.My doubt is from Types of Random Packing topic in portion Packing Design and Operation of Distillation Design

The MWR stands for?(a) Maximum Working Rate(b) Mixed Working Rate(c) Minimum Wetting Rate(d) Mega Weeping RateThis question was posed to me during an interview.This interesting question is from Packing Material topic in portion Packing Design and Operation of Distillation Design

The corrugation angle of sheets varies from(a) 28 to 45^o(b) 30 to 45^o(c) 90 to 120^o(d) 55 to 67^oI have been asked this question by my school principal while I was bunking the class.My doubt stems from Types of Random Packing topic in division Packing Design and Operation of Distillation Design

Pressure drops per theoretical stage of Mellapak packing’s are?(a) 1.0 to 2.1 mbar(b) 0.3 to 1.0 mbar(c) 2.3 to 1.2 mbar(d) 5.6 to 7.3 mbarThe question was posed to me in an online quiz.My query is from Types of Random Packing topic in section Packing Design and Operation of Distillation Design

Gauze packing’s have an F-factor of?(a) 2-2.5√Pa(b) 5 √Pa(c) 1-2.5 √Pa(d) 1-2√PaThe question was asked in exam.This interesting question is from Types of Random Packing in chapter Packing Design and Operation of Distillation Design

Which of the following is the oldest type of the tower packing?(a) Asbestos(b) Raschig rings(c) Wood(d) PVCI have been asked this question in an online quiz.Query is from Packing Types and Objectives in chapter Packing Design and Operation of Distillation Design

The Venturi Scrubber operates on velocity as high as?(a) 250 ft/s(b) 100 ft/s(c) 200 ft/s(d) 150 ft/sThis question was addressed to me in final exam.This intriguing question originated from Packing Types and Objectives topic in portion Packing Design and Operation of Distillation Design