Home » Chemical Engineering Quiz » Process Equipment and Plant Design Quiz 4

Process Equipment and Plant Design Quiz 4


Process Equipment and Plant Design Quiz 4

1 / 50

In the downcomer of a distillation column, the minimum recommended residence time is about ________ seconds?

2 / 50

Length to diameter ratio of most rotary driers is in the range of______?

3 / 50

Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around________?

4 / 50

In packed towers provided with saddle packing, liquid redistributors are positioned at every ________ times column diameter or 6 metres whichever is less?

5 / 50

Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always__________?

6 / 50

Maximum plate efficiency is achieved in case of _______ flow?

7 / 50

Liquid/petroleum fuel storage tanks are built underground (as in case of petrol pumps), when the storage capacity is less than _______ kilolitres?

8 / 50

Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter) ?

9 / 50

Maximum acceptable total liquid gradient over a tray is about ________ mm?

10 / 50

Longitudinal stress induced in a thin walled cylindrical storage vessel is ___________?

11 / 50

Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to _______?

12 / 50

Larger depth of liquid on the trays of a distillation column__________?

13 / 50

In sieve plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally _______ times the hole diameter to give the required hole area?

14 / 50

Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of _______ times the paddle diameter?

15 / 50

Nominal size of a pipe is an indication of its ________ diameter?

16 / 50

In shell and tube heat exchangers, straight tie rods are used to__________?

17 / 50

In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a ___________?

18 / 50

LMTD correction factor is used in heat exchanger design for______?

19 / 50

Overall distillation column efficiency for most of the refinery columns can be given by (for ? = 0.07 ? 1.4 cp and relative volatility < 4) (where ? = overall column efficiency, % ? = molal average viscosity of feed at average column temperature and pressure, cp ?p = pressure drop per tray, psi) ?

20 / 50

Minimum tube pitch recommended for shell and tube heat exchangers is about ________ times the outside diameter of the tube?

21 / 50

In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as_____?

22 / 50

In packed absorption tower, onset of flooding usually occurs at a pressure drop of about _______ mm of water column per metre height of packing?

23 / 50

Needle valves are generally not used for_____?

24 / 50

In the design of a bag filter, the gas temperature is an important consideration, as it affects the_____?

25 / 50

Lap joints are preferred for plates having thickness ________ mm?

26 / 50

Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling ?

27 / 50

In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed _________ of the column diameter?

28 / 50

Lug support is meant for supporting ________ vessels?

29 / 50

Le/D) for 90? elbow (medium radius) and 90?square elbow would be respectively around_____?

30 / 50

Liquid gradient over the tray results due to the_____?

31 / 50

Movement of pipeline caused by thermal expansion is taken care by providing _____?

32 / 50

Low pressure steam (with saturation temperature between 105 to 120?C) is usually used in the vacuum evaporators, which normally employ a vacuum of about ________ mm Hg (referred to a 760 mm mercury barometer)?

33 / 50

Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is_____?

34 / 50

Number of evaporators which can be used in service in a multiple effect evaporation system is limited by the___________?

35 / 50

Optimum economic pipe diameter for fluid flow is determined by the______?

36 / 50

Normally, the length to diameter ratio of rotary dryers varies from 4 to 10 and for its economic operation; the number of transfer units (NTU) for such dryers varies from ?

37 / 50

Normal screwed fittings are used for pipes upto a diameter of ________ inches?

38 / 50

Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure ?

39 / 50

Maximum allowable vapour velocity in a bubble cap tower is determined by the ______?

40 / 50

Joint efficiency (J) for a seamless pipe is________?

41 / 50

Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the_______?

42 / 50

Most of the storage vessels/tanks are made cylindrical, because of the fact that a cylinder __________?

43 / 50

In which of the following evaporators, steam is fed inside the tube while the liquor is outside the tube ?

44 / 50

It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than __________?

45 / 50

Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or _______ times the column diameter, whichever is lower?

46 / 50

In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference ________?

47 / 50

Liquid gradient over a tray can be minimised by_________?

48 / 50

Optimum reflux ratio in a continuous distillation column is determined by the___________?

49 / 50

Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about _______ percent of the total thickness?

50 / 50

Maximum size of the raschig rings used in a packed tower is about ________ of the column diameter?

Provide Your Information

Your score is

The average score is 0%


Share on facebook
Share on twitter
Share on whatsapp
Chemical Engineering Basics Quiz 1
Chemical Engineering Basics Quiz 2
Chemical Engineering Basics Quiz 3
Chemical Engineering Basics Quiz 4
Chemical Engineering Basics Quiz 5
Chemical Engineering Basics Quiz 6
Chemical Engineering Basics Quiz 7
Chemical Engineering Basics Quiz 8
Chemical Engineering Basics Quiz 9
Chemical Engineering Basics Quiz 10

Help Concept 360 Please. We need 500 Youtube Subscriber. Please Subscribe our Youtube Channel. Click below link to subscribe Please

آپ سے گزارش ہے کہ ہمارے یوٹیوب چینل کوسبسکرائب کر کے ہماری مدد کریں جیسا کہ یہ ویب سائٹ آپکی مدد کر رہی ہے۔ شکریہ