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Troubleshooting > Chapters 14-15 > Flashcards

Chapters 14-15 Flashcards

1
Q

____ components exit the top of the column in the vapor phase.

A

Light

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2
Q

_____ components re-condense and flow out of the bottom of the column.

A

Heavy

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3
Q

Condensed vapors are collected in the ____ ____ (sometimes called the reflux drum). This product is called:

A

overheads accumulator

distillate

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4
Q

Device that holds liquid level on a tray

A

Weir

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5
Q

Device that gravity feeds liquid to next lowest tray.

A

Downcomer

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6
Q

(T/F) Feed tray location is based on the expected composition of the feed.

A

TRUE

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7
Q 
A distillation system consists of:
A. feed and preheat system
B. bottoms and overhead system
C. Tank farm
D. All of the above
A

D. All of the above

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8
Q 
If the finished product in in spec, it is routed to a \_\_\_\_ tank.
A. prime
B. good
C. holding
D. atmospheric
A

A. prime

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9
Q 
Product is often routed to off-spec tanks during \_\_\_\_\_.
A. startup
B. shutdown
C. turnaround
D. break time
A

A. startup

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10
Q

Reflux flow maybe operated in ____ or ____ control.

A

flow - temperature

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11
Q

Product flow is operated in ____ control.

A

level

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12
Q

Heat source for kettle reboiler is on the ____ side.
A. tube
B. shell

A

A. tube

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13
Q

Product in a kettle reboiler is on the ____ side.
A. tube
B. shell

A

B. shell

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14
Q 
\_\_\_\_\_\_ flow from reboiler drives the columnn.
A. Water
B. Vapor
C. Reflux
D. Excess
A

B. Vapor

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15
Q

(T/F) The lighter components in a mixture are less volatile than the heavy components.

A

FALSE - they are more volatile

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16
Q

Inlet flow of the shell of kettle reboiler is from the ____ of column.
A. bottom
B. top

A

A. bottom

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17
Q 
What lowers the boiling points of liquids in a distillation column.
A. pressure
B. temperature
C. flow rate
D. vacuum
A

D. vacuum

18
Q

(T/F) The level in the reboiler should be controlled slightly above the tubes for optimum performance.

A

TRUE

19
Q

If cooling tower is lost to the overhead condenser, will column pressure increase and product likely be off-spec?

A

Yes

20
Q

Two chemicals separated in the book for distillation.

A

Butane and Pentane

21
Q

A high level in the reboiler will ____ the volume of the vapor capacity, and result in poor pressure control.
A. increase
B. reduce

A

B. reduce

22
Q

A low level in the kettle reboiler will cause ____ bottoms temperature and reduce flow to the bottoms cooler.
A. hotter
B. colder

A

A. hotter

23
Q

A vessel in which a controlled chemical reaction takes place.

A

Reactor

24
Q

Added to a reactor to promote chemical reaction without becoming part of the final product.

A

Catalyst

25
Q 
High temperature and pressure generally \_\_\_\_ molecular movement and \_\_\_\_ the reaction rate.
A. increase - increase
B. increase - decrease
C. decrease - increase
D. decrease - decrease
A

A. increase - increase

26
Q

Type of reaction that requires addition of heat to promote the reaction - absorbs heat.

A

Endothermic

27
Q

Type of reaction that generates heat. A cooling source must be provided to remove the heat of the reaction.

A

Exothermic

28
Q

Book example is a ______ reaction.

A

Exothermic

29
Q

Mixer; provides mixing of the reactants for even distribution.

A

Agitator

30
Q

Two types of reactors.

A

Batch and Continuous

31
Q

(T/F) Low flow rates in a continuous reactor increases reaction time (residence time)

A

TRUE

32
Q

(T/F) Higher levels in a reactor increase the reaction time (residence time).

A

TRUE

33
Q

(T/F) You should run the reactor level really low so that the reactants will have a long residence time.

A

FALSE. Low level means you are pumping out reactants as soon as they enter.

34
Q

How high should the level of a reactor be run?
A. Just below the agitator blades
B. High enough to cover all agitator blades
C. At maximum capacity
D. Below all agitator blades

A

B. High enough to cover all agitator blades

35
Q 
Identity of an element is defined by the:
A. atomic number
B. mass number
C. element number
D. bond number
A

A. atomic number (number of protons in the nucleus)

36
Q

Elements on the far right column of the periodic table.
A. Noble Gases
B. Alkali Metals
C. Transition Elements

A

A. Noble Gases

37
Q 
Carbon shares electrons with \_\_\_\_ atoms.
A. Helium
B. Hydrogen
C. Halogen
D. Argon
A

B. Hydrogen

38
Q 
Hydrogen shares an electron with \_\_\_\_\_.
A. Carbon
B. Cobalt
C. Helium
D. Argon
A

A. Carbon

39
Q

(T/F) Every atom seeks to fill its outer shell of electrons.

A

TRUE

40
Q

Bonding that involves shared pairs of electrons.

A

Covalent Bond

41
Q

Distillation columns are designed to separate mixtures based on their:

A

boiling points

Troubleshooting (4 decks)

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