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WorksheetsPO 4.4
Total questions: 53
Worksheet time: 27mins
Auto-ignition temperature is the minimum temperature of a gas (vapor) air mixture at which it ignites without the influence of what?
high-energy ignition source
low-energy ignition source
high-energy explosion source
ignition source
The purpose of visbreaking is to obtain boiler fuel by lowering the viscosity of the feedstock___
gasoline
tar
crude oil
naphta
What is the temperature at which the product ignites when a flame is brought to it and continues to burn quietly for a certain period of time
ignition temperature
flash temperature
explosion temperature
all of them
What is the purpose of a control sample in determining iodine number?
to determine the concentration of iodine in the sample
to compare the results with expected values
to identify impurities in the sample
to measure the density of the sample
What is relative density?
the density of a liquid oil product
the weight of a liquid oil product
the ratio of the true density of a liquid oil product to the density of distilled water at certain temperatures
the volume of a liquid oil product
Quantitative determination of water content by the Dean and Stark method in accordance with the requirements:
GOST 2477-65(2013)
GOST 2477-65(2023)
GOST 2477-65(1993)
GOST 2477-65(2003)
What is the minimum temperature of a gas (vapor) air mixture at which it ignites without the influence of a high-energy ignition source?
energy ignition source
auto-ignition temperature
flash point
fire point
Device that is used to measure the density of substances in gaseous, liquid and solid states :
areometer
barometer
pycnometer
viscosymeter
What is the unit of kinematic viscosity commonly used in the oil and gas :
stokes (St)
centipoise (cP)
pascal-seconds (Pa s)
square feet per second (ft?/s)
Choose correct statement :
the viscosity of oil and oil products decreases with increasing temperature
the viscosity of oil and oil products increases with decreasing temperature
the viscosity of oil and oil products decreases with decreasing temperature
the viscosity of oil and oil products increases with increasing temperature
In the Soviet Union, what are the standard temperatures for water and oil used to calculate relative density?:
4 °C for water and 15.6 °C for oil
4 °C for Water and 20°C for oil
15.6 °C for water and 4 °C for oil
20 °C for water and 15.6 °C for oil
Which formula is used to determine the density of liquid petroleum products in a narrow temperature range?:
Einstein's formula
Newton's formula
D.I. Mendeleev's Formula
Boyle's formula
What is the unit for density?
Kilogram per cubic meter (kg/m3)
meter per second (m/s)
newton per square meter (N/m2)
pascal (Pa)
In accordance to Appendix 9, the auto-ignition temperature of toluene is equal to what?
519 K
619 K
719 K
819 K
Why the presence of water in oil products is undesirable?
water can precipitate in the form of water crystals and complicate the use of motor fuels
water can precipitate in the form of vapors and complicate the use of motor fuels
water can precipitate in the form of liquid and complicate the use of motor fuels
all answers
The total rate of the thermal cracking process is the resultant rate of individual reactions of decomposition, condensation, polymerization, etc. :
physical
chemical
synthesis
none of them
Excess iodine is titrated with a solution :
Sodium oxide
Sodium nitrate
Sodium thiosulfate
Sodium hydroxide
The flash point difference increases as the ___ of the products increases :
pressure
mass
temperature
viscosity
Highly flammable petroleum products include products with a vapor flash point of ____ C in a closed crucible
not more than 61 C
more than 75 C
between 80 C
not more 50 C
What does the number 254 mean in the formula for calculating the mass fraction of unsaturated hydrocarbons in petroleum products?
molar mass of Iodine
number of chain of Iodine
molecular mass of Iodine
molar mass of HOH
Unsaturated compounds are a byproduct of which processes?
thermal and cat cracking
continuous catalytic cracking
visbreaking
distillation
With the which explosive limit you usually have to deal in a flash?
higher
medium
lower
none above
How often is unsaturated compounds in crude oil and natural gases in crude oil?
always
usually
rare
never
What is the viscosity?
quantitative mesure of fluid's resistance to flow
fluid is a measure of the resistance it offers to relative shearing motion
defined as a measure of a fluids internal resistance to flow under gravitional forces
scalar function, which is a measure of the movement of material points
What is the reason for obtaining underestimated results when interacting with unsaturated hydrocarons?
Due to the incomplete reaction of iodine addition
Due to the interaction with water
Due to the high-molecular resinous compounds
Due to the interation with antioxidant
What is the zone that has the gap between the upper and lower limits of explosiveness ?
area of explosiveness
flash area
area of an auto-ignition
area of ignition
Oil products at what temperature are flammable?
no more than 61 degrees Celsius in a closed crucible and no more than 66 degrees Celsius in an open crucible
no more than 70 degrees celsius in a closed crucible and no more than 61 degrees celsius in an open crucible
no more than 91 degrees celsius in a closed crucible and no more than 96 degrees celsius in an open crucible
no more than 85 degrees celsius in a closed crucible and no more than 80 degrees celsius in an open crucible
At what temperature does gasoline auto-ignited?
less than 500 degrees celsius
more than 500 degrees Celsius
at 200 degrees celsius
less than 100 degrees celsius
What usually causes auto-ignition of petroleum products?
in case of increasing the pressure
in case of increasing of the molar mass of the product
in case of violation of tightness of pipeline and apparatus
in case of deceasing of speed of the heat
Why the mixture which is rich of combustible gas doesn't explode?
it contains not enough amount of hydrogen
it contains too much carbon
there is too much nitrogen
it contains not enough amount of oxygen
According to the flash point, petroleum products divided into...
explosive and Non-explosive
combustible and Non-combustible
flammable and combustible
flammable and Inflammable
Choose the concemtration of unsaturated compounds that are contained in pyrolysis gases.
70-90%
30-50%
5-10%
20-25%
The index of viscosity is defined as....
the change of viscosity depending upon the pressure
the indicator of viscosity-temperature property
the indicator of change in temperature relation to the flow rate
the change of viscosity with influence of time and temperature
The function of usage of Appendix 11 is for the purpose of ....
finding the VI (viscosity index)
determining the medium kinematic viscosity of the mixture
defining the conditional viscosity by the kinematic viscosity
converting dynamic viscosity into the conditional viscosity
Depending upon which parameter, there can be change in the determination of the auto-ignition temperature?
the number of carbon
the number of carbon chains
the number of functional groups
the length of chain
Which contaminant is considered as the most dangerous in the crude oil during its processing?
biological microbacterias
sand and other mechanical impurities
salts which contains chlorine connection
unstable gases
Which value is estimated as the standard concentration of water in the aromatic hydrocarbon which is C6 or rarely C7 at the 50 degree of celcium?
0,072
0,056
0,161
0,025
Which unit is commonly used to measure density in the SI system?
gram per liter (g/L)
Kilogram per cubic meter (kg/m3)
pound per gallon (lb/gal)
newton per square meter (N/m2)
What does the relative density of a liquid oil product represent?
The ratio of mass to volume of the oil
The weight of the oil compared to the weight of distilled water
The ratio of its true density to the density of distilled water at certain temperatures
The percentage of water content in the oil
What does the term "molar mass" typically refer to for petroleum products?
the exact value of the mass of one mole of the substance
the mass of the subsrance per unit volume
the average value of the mass per mole, determined experimentally or calculated based on empirical dependencies
the mass of the substance per unit area
The viscosity of all types of crude oil drops rapidly with what?
temperature, Velocity
pressure, speeds
volume, temperature
velocity, pressure
The _______ of gases increase with the increase ________
temperature, presssure
viscosity, Temperature
pressure, volume
temperature, molar mass
How viscosity affected by temperature for oils and oil products?
viscosity decreases with increasing temperature
viscosity increases with increasing temperature
viscosity remains constant regardless of temperature
viscosity fluctuates with temperature
Which viscosity term is often used in technological calculations and represents the ratio of dynamic viscosity to density?
dynamic
kinematic
conditional
centistokes
How is conditional viscosity converted to kinematic viscosity?
using a nomogram (appendix 10)
by multiplying with the density of the oil
by dividing by the density of the oil
by adding the density of the oil to the ratio time
What does the number 254 mean in the formula for calculating the mass fraction of unsaturated hydrocarbons in petroleum products?
molar mass of Iodine
number of chain of Iodine
molecular mass of Iodine
molar mass of HOH
Unsaturated compounds are a byproduct of which processes?
thermal and cat cracking
continuous catalytic cracking
visbreaking
distillation
What is mch in the formula of determining the amount of carbon chains
total number of chains
number of carbon atoms
length of chain
self-ignition temperature
What does hydrogen chloride interact with to form iron chloride?
Iron magnesium
Iron calcium
Iron sulfide
Iron zinc
The presence of water in petroleum products?
undesirable
high presence
low presence
medium presence
What does thD) Degree of water of oil productse characteristic coefficient K mean?
Degree of paraffininess of oil products
Degree of salts of oil products
Degree of olefins of oil products
Degree of water of oil products
Unit of density in the SI measurement?
m3
kg/mol
kg/m3
mol
Density decreases with increasing ___?
volume
gravity
molar mass
temperature
