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ChE Boards Trivia > ChE 1 > Flashcards

ChE 1 Flashcards

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1
Q

conditions ideal for gas absorption

A

low T, high P

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2
Q

packed columns are best used for?

A

corrosive liquids, foaming materials
high flowrates, cost efficiency

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3
Q

effect of higher P in a gas absorber

A

higher P = more stages required

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4
Q

effect of lower T in the number of stages

A

lower T = more stages needed

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5
Q

describe the reaction of the inversion of cane sugar

A

pseudo-first order, second order reaction

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6
Q

what kind of reaction is cracking of crude oil

A

heterogenous catalytic

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7
Q

Who introduced the first standard screw thread

A

Joseph Whitworth

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8
Q

What is the most widely used screw thread standard

A

ISO

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9
Q

Impure product obtained by partial purification of potash from wood ashes

A

Pearl ash/potassium carbonate

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10
Q

Residue from wine vats, also called potassium tartrate

A

Argol

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11
Q

Byproduct of the sugar/ethanol industry

A

Vinasse

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12
Q

nucleation upon contact with a cold/freezing object

A

contact nucleation

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13
Q

nucleation due to presence of foreign substance

A

heteregeneous nucleation

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14
Q

nucleation due to existing crystals

A

secondary nucleation

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15
Q

what are the 4 stages of selection process for choosing the best design

A

Possible designs (credible): within the external constraints.
Plausible designs (feasible): within the internal constraints.
Probable designs: likely candidates.
Best design (optimum): judged the best solution to the problem.

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16
Q

method of water softening that uses zeolites

A

Permutit

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17
Q

who suggested the use of permutit for water softening

A

Robert Gans

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18
Q

equation for schedule number?

A

1000 Pw / Ps

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19
Q

Refers to waste or scrap glass, usually ground (CPI)

A

Cullet

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20
Q

A gas turbine cycle consisting of two adiabatic steps and two isobaric steps

A

Brayton

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21
Q

For any closed system formed initially from given masses of prescribed chemical species, by any two properties of the system, provided that these two properties are independently variable at the equilibrium state.

A

Duhem’s Theory

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22
Q

A device substantially without movingp arts, in which a fuel, such as H2, natgas, mathanol, propane, can be converted firectly into twice the quantity of electrical energy that would result from the usual boiler-turbine power generation

A

Fuel Cell

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23
Q

1 ton of refrigeration capacity =

A

200 BTU/min

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24
Q

At the exit of nozzle
A: P is high, v is low
B: both P and v are high
C: P is low, v is high
D: both P and v are low

A

C

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24
At the exit of nozzle A: P is high, v is low B: both P and v are high C: P is low, v is high D: both P and v are low
C
25
The Buckingham Pi-theorem is applied to
Dimensional analysis
26
The temperature at which the moisture in humid air exerts a partial pressure equal to its vapor pressure is the
Dew point
27
The achievement of a temperature below that of the intermediate surroundings is
refrigeration
28
Throttling process is
isenthalpic or constant enthalpy process
29
The union of the nonvolatile inorganic oxides resulting from the decomposition and fusion of alkali and alkaline eart compounds, sand, and otehr constituents, ending in a product with random atomic structure. It is a rigid, undercooled
glass
30
Industrial process for production of H2SO4. Based on ocidation of S to SO3 on a vanadium oxide catlyst followed by rection with water in fuming H2SO4
Contact process
31
Principal type of gas-solids separator employing centrifugal force
cyclone
32
It is amount of energy in excess of the average energy level which the reactants must have in order for the reaction to proceed
Activation energy
33
It is measure of profitability defined as the annual profit before taxes, divided by the FCI
Return on investment
33
It is measure of profitability defined as the annual profit before taxes, divided by the FCI
Return on investment
34
gross income less gross expense before deducting provision for income tax is
gross profit
35
Equal to the gross annual sales divided by the fixed-capital investment
Turnover ratio
36
When the thermodynamics system undergoes a cyclic process, its internal energy change is
Zero
37
Critically damped system means that damping coefficient is (topic: IPC)
1
38
Heating of an ore to bring about reaction with the furnace atmosphere
smelting
39
Device used for classification of particles with size ranges below 10 micrometers
centrifuge
40
Which media can trap particles of size 0.005 micrometer
membranes
41
H2S is removed from H2O by contacting the solution with warm air. The operation is
Stripping
41
Sulfur is undesirable is petroleum
It causes engine knocking (may tendency daw masira, 'yung tunog na garalgal daw)
42
Third aspect in plant design luh
Environment (MAY DULOT PALA YUNG PHASES NATIN SA PD)
43
Lowest temperature at which the material will ignite from an open flame
Flash point
44
Lanolin is widely used in cosmetics, derived from
Sheep's wool
45
To increase the life of an incandescent lamp, it is
Filled with argon gas
46
Wet and dry bulb temp become identical at
100% saturation curve
46
Wet and dry bulb temp become identical at
100% saturation curve
47
Measure of rate of grinding of materials in a particular mill
Grindability
48
Graetz number is concerned with
heat transfer in laminar flow
49
Natural convection is characterized by __ number
Grashof
50
The terms sweet and sour in natgas are used to denote the absence or presence of
H2S
51
Parameter which completely describees the behavior of the response to a disturbance of a 2nd order system is the
damping coefficient
52
neoprene is a
synthetic rubber
53
Water insoluble cell binders of wood
lignin
54
Rancidity of oil can be reduced by
hydrogenation
55
plasticizers are added to paint to
make it corrosion resistant
56
Varnish does not contain
pigment
57
Suitable evaporator for concentration of foaming liquid is
Long tube evaporator
58
In the Philippines, S for H2SO4 manufacturing is sourced from what industry
Paper
59
Identification of pipelines carrying different liquids and gases is done by
Color
60
Brass is an alloy of copper and
zinc
61
Formation of smallest aggregate of molecules in a supersaturated solution capable of growing into a large precipitate particle is called
Nucleation
62
SOlid whose particles have no orderly structure
Amorphous
63
He coined the term polymer to denote molecular substances of high molecular mass formed by polymerization
Jons Jakob Berzellus
64
Dimensionless qty, which for fluid flowing inside tubes, regarded as ratio of shear stress (at tube wall) to kinetic energy
Fanning friction factor
65
An early method for production of sodium carbonate from NaCl, calcium carbonate, and H2SO4
Leblanc process
66
RA 9297
Chemical Engineering Law of 2004
67
Potential members of the ChE Regulatory Board are nominated by this body
PIChE (finalized by President?)
68
What govt agency supervises Bureau of Patents, Trademarks, and Technology Transfer?
DTI
69
RA 8293
Intellectual Property Code of the Philippines
70
Info on pumps
Page 10-26
71
Bear pump
Bear reciprocating pump (positive displacement)
72
Mass transfer in a flowing fluid may be correlated by
Sherwood, Reynolds, and Schmidt numbers
73
Amount of radiation emitted in all directions... fourth power of temp
Stefan-Boltzman Law
74
Perfect emitter
black body
75
Tyler std screen scale series (Page 17-25), when mesh number increases
Aperture decreases
76
Critical speed of a ball mill depends on
radius of mill (D) and ball (d)

ChE Boards Trivia (14 decks)

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