Power Engineering 3B2 ch12 (Heat Exchangers and Cooling
Towers) Questions With Complete Solutions
Reboilers are _________________________________.
a. an exchanger with process fluids on the tube inside
b. a boiler with steam on the outside of the tubes
c. an exchanger with steam inside the tubes
d. an exchanger that only reheats fluids to drive off vapours
e. a boiler that produces steam to heat vapours
C
What are the advantages of a Kettle type reboiler:
1) Provides flexibility
2) Rapid steamer
3) Gravity circulation
4) Easily accessible
5) Smaller size
a. 1, 2, 3
b. 2, 3, 5
c. 3, 4, 5
d. 1, 4, 5
e. 1, 3, 4
E
Horizontal thermosyphon reboilers require
_________________.
,a. a large vapor space
b. a small vapour space
c. a flooded shell
d. lots of heat transfer tubes
e. placement equal to the liquid level in the tower
C
Vertical thermosyphon reboiler often has
_____________________.
a. heated liquid on the tube side
b. positioning next to a horizontal tower
c. steam on the tube side
d. liquid on the shell side
e. All of the above
A
In a horizontal thermosyphon reboiler, heat is controlled by
_____________________________________.
a. adding more steam to the vessel
b. raising the vapour pressure on the shell
c. reducing the vapour pressure on the shell
d. raising the levels on the shell side
e. by varying the condensate level in the tube side
E
, Plate heat exchangers (PHE's) use what to separate the two
mediums a/an _______________________________.
a. rubber gaskets
b. different flow patterns
c. the plate corrugations
d. inlet and outlet piping
e. alternate plates
E
Maximum cooling in PHE's is maintained by
_______________.
a. corrugating the plates
b. inlets and outlets at the plate corners
c. counter flowing the two streams
d. the thickness of the gaskets
e. thinness of the steel plates
B
High heat transfer coefficients are maintained by
________________.
a. the use of numerous plates
b. the use of stainless steel
c. thinness of the gaskets
d. close spacing of the plates
e. All of the above
D
Towers) Questions With Complete Solutions
Reboilers are _________________________________.
a. an exchanger with process fluids on the tube inside
b. a boiler with steam on the outside of the tubes
c. an exchanger with steam inside the tubes
d. an exchanger that only reheats fluids to drive off vapours
e. a boiler that produces steam to heat vapours
C
What are the advantages of a Kettle type reboiler:
1) Provides flexibility
2) Rapid steamer
3) Gravity circulation
4) Easily accessible
5) Smaller size
a. 1, 2, 3
b. 2, 3, 5
c. 3, 4, 5
d. 1, 4, 5
e. 1, 3, 4
E
Horizontal thermosyphon reboilers require
_________________.
,a. a large vapor space
b. a small vapour space
c. a flooded shell
d. lots of heat transfer tubes
e. placement equal to the liquid level in the tower
C
Vertical thermosyphon reboiler often has
_____________________.
a. heated liquid on the tube side
b. positioning next to a horizontal tower
c. steam on the tube side
d. liquid on the shell side
e. All of the above
A
In a horizontal thermosyphon reboiler, heat is controlled by
_____________________________________.
a. adding more steam to the vessel
b. raising the vapour pressure on the shell
c. reducing the vapour pressure on the shell
d. raising the levels on the shell side
e. by varying the condensate level in the tube side
E
, Plate heat exchangers (PHE's) use what to separate the two
mediums a/an _______________________________.
a. rubber gaskets
b. different flow patterns
c. the plate corrugations
d. inlet and outlet piping
e. alternate plates
E
Maximum cooling in PHE's is maintained by
_______________.
a. corrugating the plates
b. inlets and outlets at the plate corners
c. counter flowing the two streams
d. the thickness of the gaskets
e. thinness of the steel plates
B
High heat transfer coefficients are maintained by
________________.
a. the use of numerous plates
b. the use of stainless steel
c. thinness of the gaskets
d. close spacing of the plates
e. All of the above
D
