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ChE Board Review > CPI, Process control & Design > Flashcards

CPI, Process control & Design Flashcards

1
Q

The minimum plate spacing in most of the petroleum refinery distillation columns (if diameter 73 ft) is normally

A

18”

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2
Q

Back-trapping in a distillation column results due to

A

a finite stage contactor

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3
Q

Twenty-five percent cut segmental baffle means that the baffle

A

height is 75% of the I.D. of the shell

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4
Q

Joint efficiency for a seamless pipe is

A

1

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5
Q

In the design of a paddle agitator the ratio paddle diameter to tank diameter is normally taken as:

A

0.8

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6
Q

The ratio propeller agitator diameter to tank diameter is normally taken as:

A

0.15-0.30

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7
Q

The minimum baffle height should be

A

twice the impeller diameter

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8
Q

Vertical valves are not supported by

A

saddles

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9
Q

Aqua regia is a mixture of

A

nitric and HCl

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10
Q

What alloying element is added in stainless steel to impart corrosion resistance?

A

chromium

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11
Q

process for the manufacture of soda ash (Na2CO3)?

A

Solvay process

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12
Q

It is the most abundant metal in the earth‘s crust

A

aluminum

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13
Q

A process used in paper production in which sodium sulfate is added to a basic digestion liquor

A

sulfate process

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14
Q

Corundum is

A

aluminum oxide

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15
Q

Silicone rubbers are

A

polysiloxanes

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16
Q

Blue vitriol is

A

CuSO45H2O

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17
Q

An ore of lead

A

galena

18
Q

Prussian blue is

A

ferric ferrocyanide

19
Q

Epsom salt is

A

magnesium sulfate

20
Q

Salt peter is

A

potassium nitrate

21
Q

A unicellular organism surrounded by a cell wall possessing a distinct nucleus

A

yeast

22
Q

It is characterized by simple vegetative bodies from which reproductive structures are elaborated. It contains no chlorophyll and therefore requires sources of complex organic molecules.

A

fungi

23
Q

An industrial process for making hydrazine from ammonia and hypochlorite ion in aqueous solution.

A

Raschig process

24
Q

An early method for the production of sodium carbonate form sodium chloride, calcium carbonate and sulfuric acid.

A

Leblanc process

25
Q

An early process for the production of sulfuric acid, in which SO2 is oxidized to SO3 by nitrogen oxides in lead-lined chambers.

A

Lead chamber process

26
Q

kaolinite

A

Al2O32SiO22H2O

27
Q

A fracturing, or flaking off, of a refactory brick, or block, due to uneven heat stresses or compression caused by heat.

A

spalling

28
Q

An arrangement of physical components connected or related in such a manner as to command, direct or regulate itself or another system is a

A

control system

29
Q

An inherent disadvantage of this control system is that it results in continuous cycling of the controlled variable and thus produces excessive wear in the final control element.

A

on-off control

30
Q

It is an arrangement of physical components connected or related in such a manner as to form and/or act as an entire unit.

A

set

31
Q

It is a control system in which the control action is independent of the output.

A

open-loop system

32
Q

The simplest mode of control which is characteristic of two-position control commonly utilized in a thermostat for controlling the temperature of heaters, air-conditioners, refrigerators, etc…

A

on-off control

33
Q

A sensor usually made of semi-conductor that utilizes the effect of temperature on the resistance to current is called a

A

thermistor

34
Q

What is the end product in the process of fermentation?

A

ethanol

35
Q

substance, usually oxides, used in glass, glazes and ceramic bodies to lower high melting point of the main glass forming constituents

A

Fluxes

36
Q

a heat-resistant material, i.e. a mineral that is resistant to decomposition by heat, pressure or chemical attack

A

refractory

37
Q

glass made by fusing pure silica without a flux, very resistant thermally and chemically.

A

Vitreous silica

38
Q

Soluble glasses used only as solutions

A

Alkali silicates

39
Q

soda-limed-silica glass of such wide applications, for windows, transparent fixtures, and all manner of containers

A

Lime glass

40
Q

which of the following is not a natural cellulosic fibers

a. cotton
b. jute
c. sisal
d. yarn

A

yarn

ChE Board Review (5 decks)

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