LQ3 Old Test Flashcards
It is the product of chlor-alkali process that can be ued as an important energy source?
H2
It has consumed the lowest electricity and produces the highest purity of NaOH
Membrane cell process
These are the products of chlor-alkali industry
Cl2, H2, NaOH
The electrolysis process in chlorine-alkali industry uses a permeable membrane to facilitate the exchange of ions, converting Cl- first to Cl2 and then, Na+ to NaOH. This also requires a liquid level difference to prevent backflow
Diaphragm cell process
These are the products of chlor-alkali industryo
Cl2, H2, NaOH
The brin process used by the british oxygen company was developed in which period?
Mid 1880’s
The production of syngas from methane is possible through which of the following processes?
Steam reforming
What are the application of N2 in any industry?
Tank and pipeline purging, sparging, molten aluminum degassing
This process allows the creation of flat steel sheets
Rolling
The first step in basic oxygen steelmaking is called
Charging
The bayer process was developed on which time period?
1885 to 1890
The process of extracting aluminum from alumina through electrolysis is called
Hail-heroult process
The process of converting bauxite into aluminum oxide using NaOH is called
Bayer process
It is defined as the discipline concerned with the production of metal products through high temperature chemical reactions
Pyrometallurgy
The raw materials for the blast furnace is called
Charge
The iron ore that contains iron in the form of Fe2O3 is called
Haematite
There are cements that can settle or harden in dry conditions
True
Calcination is a ____ process
Endothermic
These are the companies that produces cement
- Cemex holding Ph inc.
- Holcim Ph
The process of decomposition of calcium carbonate into calcium oxide and carbon dioxide in cement industry is called
Calcination
The product of rotary kilns is called
Clinker
The collective term for processing of raw materials in ceramic industry is called
Beneficiation
These are the elements present in clay used for ceramic industry
Aluminum, silicon, and oxygen
This type of forming of ceramics involves dry pressing, isostatic compaction and vibratory compaction
Dry forming
It is a process of converting the materials for ceramic into a dense, cohesive body with uniform structure, through a controlled heat process
Sintering
The bath used in pilkington process is made up of
Tin
The term to describe broken glass being recycled in glass manufacturing plants is called
CULLETS
CULLETS
In the production of sulfuric acid, what is the catalyst used in converting sulfur dioxide to sulfur trioxide?
Vanadium pentoxide
An industrial chemical that is used in certain processes to prevent contact with air
Nitrogen
What is the number one industrial chemical worldwide in terms of production volume
Sulfuric acid
It is used in the production of antifreeze agents
Ethylene
It is also called lye, and is the most widely used industrial alkali
Sodium hydroxide
Its major use is in the production of polyvinyl chloride
Ethylene dichloride
Which industrial chemical release substantial heat when diluted, high enough to ignite combustible materials?
Sodium hydroxide
The main products of chlorine-alkali industry can be obtained through
Electrolysis
Slow cooling of glass to increases it strength is a process called
Annealing
What is the most common process used for the purification of hydrogen?
Pressure Swing Absorption
(note: be careful kasi may adsorption sa choices dapat aBsorption)
Which one is a fuel gas: nitrogen, acetylene, carbon dioxide, or oxygen?
Acetylene
When air is processed to produce argon, nitrogen, and oxygen, the first to be collected is:
Nitrogen
Up to what pressure is acetylene compressed for filling into cylinders?
300 psi
What is the boiling point of argon?
-186 degrees Celsius
Which of the following is a characteristic of acetylene: flammable, toxic, corrosive, or reactive?
Flammable
Which are the variable mixture components of synthesis gas?
Carbon monoxide and hydrogen
Which of the following is considered refrigerant gas: oxygen, hydrogen, carbon dioxide, or nitrogen?
Nitrogen
Who invented the pneumatic trough for gas collection?
Stephen Hales
Which reaction produces acetylene?
Reaction between calcium carbide and water
What type of Portland cement is useful in cold weather concreting applications?
Type III
The upper part of the kiln in the production of cement is called:
Calcination zone
In the manufacture of Portland cement, the temperature around the clinkering zone when raw materials are burned is
1500-1700 degrees Celsius
Which of the following statements is correct with regard to the production of Portland cement?
- The wet process is used for hard materials
- The dry process produces superior quality of cement
- Overall cost for both wet and dry process is the same
- The dry process requires less processing time compared to the wet process
The dry process requires less processing time compared to the wet process
Which of the following is not a raw material in the production of Portland cement?
- Blast furnace slag
- clayey raw materials
- sand
- lime-containing raw materials
Sand
In the second stage of crushing the raw materials in the production of cement _______ is used
Ball mill
In the production of cement, what is the temperature around the calcination zone
1000 degrees Celsius
What is the required proportion of limestone and clay in the production of Portland cement?
5:1
What is the purpose of adding gypsum to the burned cement clinker when grinding?
To control the settling time of cement
The burning of raw materials in the production of Portland cement is done in a _______
Rotary kiln
What type of Portland cement is used for applications that require an extreme resistance to sulfates?
Type V
The lower part of the kiln in cement production produces
clinkers
What is the calcination temperature in the production of aluminum?
960-1100 degrees Celsius
It is a thermal process of converting loose fine particles into a solid coherent mass by heat and/or pressure without fully heating the particles to the point of melting
Sintering
It is a tower shaped structure lined with heat resistance brick used in the production of iron
Blast furnace
It is the principal industrial means of refining bauxite to produce alumina
Bayer’s process
What is the process of heating steel to a fixed temperature and cooling it at a slow and controlled rate to enhance the ductility of the metal making them easier to fabricate into finished product?
Annealing
What is the purpose of rolling in the production of steel?
To make the thickness uniform and impart a desired mechanical property
Steel with high carbon content used to make blades
Wootz steel
How many percent carbon is cast iron?
2-4%
What is the product formed by pouring molten steel into a mold cavity?
Steel casting
It is an alloy composed of iron and carbon
Steel
What is the waste material in the iron making process?
Slag
The temperature of glass melting furnace is around
1500 degrees Celsius
The bonding in ceramic is
Partially ionic and partially covalent
Glass is a mixture of
Metallic silicates
It is the process by which ceramics are thermally consolidated into a dense cohesive body composed of fine, uniform grains
Firing
An inorganic amorphous solid that is hard
Glass
It is a process of removing the impurities of the raw materials in ceramic manufacture
Beneficiation
Which of the following types of glass accounts for about 0-% of manufactured glass?
- soda-lead glass
- potash lead glass
- soda-lime silicate glass
- borosilicate glass
Soda-lime silicate glass
Which of the following is not a property of ceramic?
- hard and durable
- chemically inert
- high melting point
- high thermal conductivity
High thermal conductivity
Which of the following statements is/are correct with regard to ceramics?
- They are brittle
- They are inorganic substances
- They are good thermal insulators
- All of these
All of these
The primary difference between a ceramic and a glass is based on its ________
Crystallinity
