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ChE Boards Trivia > ChE 1 > Flashcards

ChE 1 Flashcards

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
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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25
Q

The Buckingham Pi-theorem is applied to

A

Dimensional analysis

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26
Q

The temperature at which the moisture in humid air exerts a partial pressure equal to its vapor pressure is the

A

Dew point

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27
Q

The achievement of a temperature below that of the intermediate surroundings is

A

refrigeration

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28
Q

Throttling process is

A

isenthalpic or constant enthalpy process

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29
Q

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

A

glass

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30
Q

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

A

Contact process

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31
Q

Principal type of gas-solids separator employing centrifugal force

A

cyclone

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32
Q

It is amount of energy in excess of the average energy level which the reactants must have in order for the reaction to proceed

A

Activation energy

33
Q

It is measure of profitability defined as the annual profit before taxes, divided by the FCI

A

Return on investment

33
Q

It is measure of profitability defined as the annual profit before taxes, divided by the FCI

A

Return on investment

34
Q

gross income less gross expense before deducting provision for income tax is

A

gross profit

35
Q

Equal to the gross annual sales divided by the fixed-capital investment

A

Turnover ratio

36
Q

When the thermodynamics system undergoes a cyclic process, its internal energy change is

A

Zero

37
Q

Critically damped system means that damping coefficient is (topic: IPC)

A

1

38
Q

Heating of an ore to bring about reaction with the furnace atmosphere

A

smelting

39
Q

Device used for classification of particles with size ranges below 10 micrometers

A

centrifuge

40
Q

Which media can trap particles of size 0.005 micrometer

A

membranes

41
Q

H2S is removed from H2O by contacting the solution with warm air. The operation is

A

Stripping

41
Q

Sulfur is undesirable is petroleum

A

It causes engine knocking (may tendency daw masira, ‘yung tunog na garalgal daw)

42
Q

Third aspect in plant design luh

A

Environment (MAY DULOT PALA YUNG PHASES NATIN SA PD)

43
Q

Lowest temperature at which the material will ignite from an open flame

A

Flash point

44
Q

Lanolin is widely used in cosmetics, derived from

A

Sheep’s wool

45
Q

To increase the life of an incandescent lamp, it is

A

Filled with argon gas

46
Q

Wet and dry bulb temp become identical at

A

100% saturation curve

46
Q

Wet and dry bulb temp become identical at

A

100% saturation curve

47
Q

Measure of rate of grinding of materials in a particular mill

A

Grindability

48
Q

Graetz number is concerned with

A

heat transfer in laminar flow

49
Q

Natural convection is characterized by __ number

A

Grashof

50
Q

The terms sweet and sour in natgas are used to denote the absence or presence of

A

H2S

51
Q

Parameter which completely describees the behavior of the response to a disturbance of a 2nd order system is the

A

damping coefficient

52
Q

neoprene is a

A

synthetic rubber

53
Q

Water insoluble cell binders of wood

A

lignin

54
Q

Rancidity of oil can be reduced by

A

hydrogenation

55
Q

plasticizers are added to paint to

A

make it corrosion resistant

56
Q

Varnish does not contain

A

pigment

57
Q

Suitable evaporator for concentration of foaming liquid is

A

Long tube evaporator

58
Q

In the Philippines, S for H2SO4 manufacturing is sourced from what industry

A

Paper

59
Q

Identification of pipelines carrying different liquids and gases is done by

A

Color

60
Q

Brass is an alloy of copper and

A

zinc

61
Q

Formation of smallest aggregate of molecules in a supersaturated solution capable of growing into a large precipitate particle is called

A

Nucleation

62
Q

SOlid whose particles have no orderly structure

A

Amorphous

63
Q

He coined the term polymer to denote molecular substances of high molecular mass formed by polymerization

A

Jons Jakob Berzellus

64
Q

Dimensionless qty, which for fluid flowing inside tubes, regarded as ratio of shear stress (at tube wall) to kinetic energy

A

Fanning friction factor

65
Q

An early method for production of sodium carbonate from NaCl, calcium carbonate, and H2SO4

A

Leblanc process

66
Q

RA 9297

A

Chemical Engineering Law of 2004

67
Q

Potential members of the ChE Regulatory Board are nominated by this body

A

PIChE (finalized by President?)

68
Q

What govt agency supervises Bureau of Patents, Trademarks, and Technology Transfer?

A

DTI

69
Q

RA 8293

A

Intellectual Property Code of the Philippines

70
Q

Info on pumps

A

Page 10-26

71
Q

Bear pump

A

Bear reciprocating pump (positive displacement)

72
Q

Mass transfer in a flowing fluid may be correlated by

A

Sherwood, Reynolds, and Schmidt numbers

73
Q

Amount of radiation emitted in all directions… fourth power of temp

A

Stefan-Boltzman Law

74
Q

Perfect emitter

A

black body

75
Q

Tyler std screen scale series (Page 17-25), when mesh number increases

A

Aperture decreases

76
Q

Critical speed of a ball mill depends on

A

radius of mill (D) and ball (d)

ChE Boards Trivia (14 decks)

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