15Heat Exchanger

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HEAT EXCHANGERS

OPERATING PRINCIPLES

1 Flows that are corrosive, fouling, scaling, or under high pressure are usually placed in the

a) Shell Side

b) Tube Sidec) Heat Exchanger not used

d) None of the above

2 Viscous and condensing fluids are typically placed on thea) Shell Side

b) Tube Side

c) Heat Exchanger not usedd) None of the above

3 The iniu approach teperature for shell and tube exchangers for fluids is abouta) !" "# $%" "F)

b) & " # $!" "F)

c) " " # $" "F)d) No 'iit

4 The typical #ooling (ater is available at a axiu teperature of

a) " "F $*" "#)b) !!& "F $+& "#)

c) !*! "F $&& "#)

d) & "F $!& "#)

5 The #ooling water should be returned to the #ooling Tower no higher than

a) "F $%& "#)b) !!& "F $+& "#)

c) !*! "F $&& "#)

d) " "F $*" "#)

6 Spiral Heat Exchangers are often used for slurry and services containing solids

a) True

b) False

7 The Forula to convert -egree Celsius to -egree Fahrenheit

a) -eg F . $-eg # /!01) 2 *%b) -eg F . $-eg # /!01) 3 *%

c) -eg F . $-eg # 4!01) 3 *%

d) None of the 5bove

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8 The Specific Heat of 6etroleu Fuels copared to (ater isa) Higher

b) 'ower

c) Sae

9 The direction of heat is fro #old to Hot

a) Trueb) False

10 The resistance to flow of heat ay be due to

a) Stagnant li7uid flowb) Scale on the tube

c) The tube wall

d) 5ll the 5bove

11 The purpose of 8affles in the tube bundle is

a) To increase the velocity if the shell fluidb) To increase turbulence

c) To increase the Heat Transfer 9ate

d) 5ll the above

12 (hich of the following is true about :ulti26ass Exchanger

a) :ore efficient than Single26ass

b) 6ressure drop is higherc) 8oth a ; b


13 The function of the floating head in the exchanger is

a) To facilitate easy reoval of the tubes

b) To prevent erosion on the tubes

c) To allow oveent due to theral expansiond) none of the above

14 The purpose of ipingeent baffles isa) To allow oveent due to theral expansion

b) To prevent erosion on the tubes

c) To increase the Heat transfer 9ated) None of the above

15 (hich of the following is4are types of bundlesa) Fixed Tubes

b) Floating head Tubes

c)


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16 The co2current flow type exchanger is ore efficient than counter2current exchangera) True

b) False

17 #auses for the decrease in the efficiency of exchanger=

a) Fouling

b) >nternal 'ea?sc) 5ccuulation of Non2condensable

d) 5ll the above

18 #auses for gas?et lea?a) Theral shoc?

b) Higher2pressure build2up

c) 6oor 7uality or -aage of @as?et

d) 5ll the 5bove

19 The axiu cooling water outlet teperature is + o #because above which scaling occurs due to salt deposition fro water

a) True

b) False

20 8loc? Valves and 8ypass Valves are provided in a heat exchanger

a) To enable aintenance on the without shut2down of unit

b) To interchange shell2side and tube2side fluidsc) To enable bloc? the gases in the feed

d) Non of the above

21 (hich of the following is true about Shell Test

a) To find lea?s

b) Tested at !0& ties the operating pressure

c) (ater is used to pressuriAed) 5ll the above

22 Non2condensable are reoved fro condensers because theya) -ecrease the heat transfer efficiency

b) 9educe the area of contact

c) -epress the -ew 6oint of the Vaporsd) 5ll the above

23 The critical chec? on a stea heater or a re2boiler is the operation of Stea2Trapsa) True

b) False

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24 (hich of the following is4are type$s) of re2boilera) Bettle type

b) Thero siphon type

c) 8oth a ; bd) None

25 TE:5 stands for

a) Tubular Exchangers :anufacturers 5ssociation

b) Tubes and Exchangers :echanical 5ssociation

c) Tubular Exchangers :echanical 5ssignentd) None of the above

26 The baffle that is fitted at inlet flow area in the exchanger is

a) >pingeent 8affleb) 'ongitudinal 8affle

c) #ross 8affled) 5ll the above

27 Function of CCCCC is to support the tubes and to increase turbulence

a) >pingeent 8affle

b) 'ongitudinal 8afflec) #ross 8affle

d) None the above

28 The exchanger used to condense the process stea is ?nown as

a) #ooler b) #ondenserc) Heater

d) 9e2boiler

29 (here teperature difference between two streas is higher, the exchanger that is not suitable isa) Floating head

b) Fixed head

c) D


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31 (here cleaning of the tubes is re7uired to dirty service CCCCC type of heat exchanger is not preferred

a) Floating head

b) Fixed headc) Dpingeent

c) 'ongitudinald) 5ll the above

33 CCCCC is re7uired to hydro2test floating head heat exchanger

a) Test 9ingb) Tube Sheet

c) #ross 8affle

34 CCCCCC ; CCCCC ?eep the baffle spacing fixeda) Tie 9od ; spares tube

b) Shell ; tubec) #hannel head ; floating cover

35 CCCCCCCC baffle is a proble for short circuiting in shell side of heat exchanger

a) #rossb) >pingeent

c) 'ongitudinal

d) 5ll the above

36 Stac?ed tube exchangers shall be liited to CCC units high0a) neb) Two

c) Three

d) No 'iit

37 8oilers are a type of heat exchangers

a) True

b) False

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COMMISSIONING OF THE HEAT ECHANGER

38 -uring #oissioning, the inlet and outlet line of shell and tube side of the Heat Exchanger should be

a) 8linded

b) 9eoved

39 5ir fro shell ; tube side is reoved using

a) Stea

b) Flushing ilc) 8oth can be used

40 8efore coissioning the exchanger, drain valve is

a) #losedb) pen

c) %" open

41 8efore coissioning the exchanger, vent valve is

a) #losed

b) penc) %" open

42 >n case only steaing is done to reove air, the pressure aintained in both shell and tube side isa) 6ositive

b) Negativec) Gero

43 -uring #oissioning, the fluid that is opened first is cold fluid

a) True

b) False

44 #oissioning the hot ediu is by opening inlet valve and then opening outlet isolation valve0

a) Trueb) False

45 The shell ; tube side bypass isolation valves are CCCCCCCC after coissioning of the exchangera) #losed

b) pen

c) Sei2open

46 Hot 8olting to aintenance does not re7uire wor? perit

a) True

b) False

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!ECOMMISSIONING OF THE HEAT EHANGER

47 8efore starting decoissioning operation, the following are inforeda) SFE

b) 6

c) 8othd) None

48 8efore -ecoissioning, the bypass isolation valves on shell and tube side of the exchanger is

a) #losedb) pen

c) Sei 2 open

49 #ooling ediu inlet isolation valve is CCC and then close the outlet isolation valve is CCCa) pened, #losed

b) #losed, penedc) pened, pened

d) #losed, #losed

50 Hot ediu inlet isolation valve is CC and then close the outlet isolation valve is CCCa) pened, #losed

b) #losed, pened

c) pened, penedd) #losed, #losed

51 Steaing of both shell ; tube side is done by ?eeping the drain valvea) #losed

b) pen

c) Sei 2 open

52 Steaing of both shell ; tube side is done by ?eeping the vent valve

a) #losed

b) penc) Sei 2 open

53 >f the heat exchanger handles heavy aterial, flush the exchanger witha) Stea

b) 5ir

c) Flushing ild) None of the above

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!ATA SHEET

54 How any exchangers are there in H#@ 6up25round 4 Fresh Feed Exchanger $S"! 52I)

a) ne

b) Fivec) Ten


55 (hat is the Shell side li7uid in the H#@ 6up25round 4 Fresh Feed Exchanger $S"! 52I)a) :06 Stea

b) '#@

c) Fresh Feed

d) H#@

56 (hat is the tube side li7uid in the H#@ 6up25round 4 Fresh Feed Exchanger $S"! 52I)a) Fresh Feed

b) :06 Stea

c) '#@d) H#@

57 >n the Fractionator verhead #ondenser $*!2S "%4"*), the shell side fluid isa) '#@

b) #ooling (aterc) verhead Vapors

58 >n the Fractionator verhead #ondenser$*!2S "%4"*), the tube side fluid is

a) #ooling (aterb) verhead Vapors

c) '#@

59 >n '#@ 65 4 8F( Exchanger $*!2S "+), the shell side fluid isa) Stea

b) '#@

c) 8F(

60 >n '#@ 65 4 8F( Exchanger $*!2S "+), the tube side fluid is

a) Stea

b) '#@

c) 8F(

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61 >n '#@ 605 4 '6 Stea @enerator $*!2 S "&), the shell side fluid is

a) '#@b) '06 8F(

c) '06 Stea

62 >n '#@ 605 4 '6 Stea @enerator $*!2 S "&), the tube side fluid is

a) '#@

b) '06 8F(c) '06 Stea

63 >n H#@ 605 4 :06 @enerator $*! 2 S "), the shell side fluid is

a) '06 Steab) H#@

c) :06 8F(

64 >n H#@ 605 4 :06 @enerator $*! 2 S "), the tube side fluid isa) '06 Stea

b) H#@c) :06 8F(

65 >n #o?er 8lowdown -ru Heater $*! 2 S "), the shell side fluid is

a) H#@b) H06 Stea

c) :06 8F(

66 >n H#@ 6roduct 4 '06 @enerator $*! 2 S !"), the shell side fluid isa) '06 8F(

b) H#@

c) :06 8F(

67 >n H#@ 6roduct 4 '06 @enerator $*! 2 S !"), the tube side fluid is

a) '06 8F(

b) H#@c) :06 8F(

68 >n 5bsorber 4 Stripper 9e28oiler No0 ! $*% 2 S "! 548), the shell side fluid isa) :06 Stea

b) Stripper Trap out

c) StabiliAed Naphtha

69 >n 5bsorber 4 Stripper 9e28oiler No0 ! $*% 2 S "! 548), the tube side fluid is

a) :06 Stea


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70 >n 5bsorber 4 Stripper 9e28oiler No0 % $*% 2 S "% 548), the shell side fluid isa) :06 Stea



71 >n 5bsorber 4 Stripper 9e28oiler No0 % $*% 2 S "% 548), the tube side fluid is

a) :06 Steab) Stripper Trap out


72 >n 'ean 4 9ich Sponge il Exchanger $*% 2 S "* 548), the shell side fluid isa) #ooling (ater

b) 9ich Sponge il

c) 'ean Sponge il

73 >n 'ean 4 9ich Sponge il Exchanger $*% 2 S "* 548), the tube side fluid isa) #ooling (ater

b) 9ich Sponge il

c) 'ean Sponge il

74 >n 'ean Sponge il Tri #ooler $*% 2 S "+), the shell side Fluid is

a) 'ean Sponge il

b) 9ich Sponge ilc) #ooling (ater

75 >n 'ean Sponge il Tri #ooler $*% 2 S "+), the tube side Fluid isa) 'ean Sponge il

b) 9ich Sponge il

c) #ooling (ater

76 >n 'ean il Tri #ooler $*% 2 S "&), the Shell side fluid is

a) 'ean il

b) #ooling (aterc) Stea

77 >n 'ean il Tri #ooler $*% 2 S "&), the Tube side fluid isa) 'ean il

b) #ooling (ater

c) Stea

78 >n -ebutaniser 9eboiler $*% 2 S " 548), the Shell side fluid is

a) H#@

b) -ebutaniser Trap out

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c) :06 Stea

79 >n -ebutaniser 9eboiler $*% 2 S " 548), the Tube side fluid isa) H#@

b) -ebutaniser Trap out

c) :06 Stea

80 >n Naphtha Stripper 9e2boiler $*% 2 S "), the Shell side fluid is

a) :06 Steab) Naphtha Stripper Trap out

c) -ebutaniser Trap out

81 >n Naphtha Stripper 9e2boiler $*% 2 S "), the Tube side fluid isa) :06 Stea

b) Naphtha Stripper Trap out

c) -ebutaniser Trap out

82 >n Naphtha Splitter overhead 6roduct #ooler $*% 2 S "1), the Shell side fluid is

a) #ooling (aterb) 'ight #o?er Naphtha

c) Heavy #o?er Naphtha

83 >n Naphtha Splitter overhead 6roduct #ooler $*% 2 S "1), the Tube side fluid isa) #ooling (ater

b) 'ight #o?er Naphtha

c) Heavy #o?er Naphtha

84 >n #opressor >nter Stage #ooler $*% 2 S " 548), the Shell side fluid is

a) -ebutaniser trap out

b) #ooling (ater

c) #opressor >nterstage

85 >n #opressor >nter Stage #ooler $*% 2 S " 548), the Tube side fluid isa) -ebutaniser trap out

b) #ooling (ater


86 >n 5bsorber 4 Stripper Feed #ooler $*% 2 S !" 548), the Shell side fluid is

a) #ooling (aterb) 5bsorber 4 Stripper Feed


87 >n 5bsorber 4 Stripper Feed #ooler $*% 2 S !" 548), the Tube side fluid is

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a) #ooling (ater

b) 5bsorber 4 Stripper Feed


88 >n -ebutaniser verhead #ondenser $*% 2 S !! 548), the Shell side fluid is

a) Steab) #ooling (ater

c) -ebutaniser verhead

89 >n -ebutaniser verhead #ondenser $*% 2 S !! 548), the Tube side fluid is

a) Stea

b) #ooling (ater

c) -ebutaniser verhead

90 >n Naphtha Splitter 8ottos 6roduct #ooler $*% 2 S !%), the Shell side fluid is

a) #ooling (ater

b) Heavy #o?er Naphthac) 'ight #o?er Naphtha

91 >n Naphtha Splitter 8ottos 6roduct #ooler $*% 2 S !%), the Tube side fluid is

a) #ooling (ater

b) Heavy #o?er Naphtha

c) 'ight #o?er Naphtha

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15Heat Exchanger

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