XXIII. Questions Flashcards
(50 cards)
It is considered the most reliable method for accurately determining the content of gold, silver, and platinum-group metals (except osmium and ruthenium) in ores or concentrates. This process involves melting a gold-bearing sample in a clay crucible/cupel at >1000 °C with a mixture of fluxes (such as silica and borax), lead oxide (called litharge), and a reducing agent (frequently flour).
a. Pyrometallurgy
b. Fire Assay
c. Frasch Process
d. AAS
B. Fire Assay
Extraction of metals from ores using high temperatures.
Pyrometallurgy
Accurate method to determine gold, silver, and PGM content by melting the sample with fluxes and lead.
Fire Assay
Method of extracting sulfur from underground deposits using superheated water.
Frasch Process
Analytical technique used to measure metal concentrations in a solution by detecting light absorbed by atoms.
AAS (Atomic Absorption Spectroscopy)
What process refers to the dissolution of silver in a dore during boiling in nitric acid?
a. Annealing
b. Cupellation
c. Chemical Digestion
d. Parting
d. Parting
the process of separating silver from gold in a dore alloy by dissolving silver in nitric acid, leaving behind pure gold
Parting
Heating and slowly cooling a metal to make it softer and reduce internal stresses.
Annealing
A high-temperature process used to separate precious metals (like gold and silver) from lead.
Cupellation
Breaking down solid samples into liquid form using acids for analysis.
Chemical Digestion
Cyprus, Kuroko, and Besshi-type VMS deposits can be found in what areas in the Philippines, respectively?
a. Bagacay-Rapurapu-Barlo
b. Barlo-Rapurapu-Bagacay
c. Bagacay-Barlo-Rapurapu
d. Barlo-Bagacay-Rapurapu
a. Bagacay-Rapurapu-Barlo
What is the strongest acid?
a. Fluoroantimonic Acid
b. Aqua regia
c. Nitric Acid
d. Hydrochloric Acid
a. Fluoroantimonic Acid
Fluoroantimonic acid is the strongest known superacid, much stronger than 100% sulfuric acid. It’s a mixture of hydrogen fluoride (HF) and antimony pentafluoride (SbF₅) and can protonate even hydrocarbons.
Who was the infamous Filipino
geologist who salted crushed core samples with gold shavings in Busang, East Kalimantan, Indonesia in 1997?
Michael De Guzman
What is the most common coal rank in the Philippines?
a. Lignite
b. Subbituminous
c. Bituminous
d. Semianthracite
b. Subbituminous
Where can we found cinnabar in the Philippines? The powdered cinnabar used for pigment is called ____________.
a. Masbate; Scarlet
b. Mindoro; Vermillion
c. Palawan; Vermillion
d. Benguet; Scarlet
b. Mindoro; Vermillion
The Negros Trench was formed in response to the collision of
____________ and __________.
Eurasian Plate and the Philippine Sea Plate
One karat of gold is equal to how many percent gold content? Three nines fine correspond to gold of _____% purity.
One karat of gold is equal to 4.1667% gold content. (Since 24-karat gold is pure, 1 karat is 1/24th of that purity).
Three nines fine (or 999 fine) corresponds to 99.9% purity of gold.
What are the raw materials of:
➢ Pozzolan Cement
➢ Portland Cement
➢ Concrete
➢ Brass
➢ Bronze
- Pozzolan Cement – Pozzolan (volcanic ash), lime (calcium oxide), and sometimes gypsum.
- Portland Cement – Limestone, clay, gypsum, and iron ore (or other materials like shale and sand).
- Concrete – Cement, water, sand, gravel (or aggregates), and sometimes additives.
- Brass – Copper and zinc.
- Bronze – Copper and tin, with possible small amounts of other elements like aluminum or phosphorus.
What is the “Revised Implementing Rules and Regulations (IRR) of the Republic Act (RA) No. 7076, otherwise known as the People’s Small-Scale Mining Act of 1991” ?
DAO 2015-03
SSM contract area must not exceed how many hectares?
a. 81 hectares
b. 30 hectares
c. 20 hectares
d. 5 hectares
c. 20 ha
It is a Glencore managed company that processes and exports refined copper and precious metal by-products of international standards located in Isabel, Leyte. The smelting process employed by this company is _________.
Philippine Associated Smelting and Refining (PASAR) Corporation
Differentiate the following parts of a technical report:
➢ Plate vs. Figure vs. Illustration vs. Table
➢ Annex vs. Appendix
Plate: Refers to a large, often high-quality, image or photograph that is typically included on a separate page in a report. Plates are used for images that require a full page, like maps or photographs.
Figure: A general term for any graphic representation (e.g., charts, graphs, diagrams, photographs) used in the report. Figures are numbered consecutively and referenced in the text.
Illustration: A type of figure that usually refers to detailed drawings, sketches, or diagrams, often used to explain concepts or provide visual representations of complex ideas.
Table: A structured set of data organized into rows and columns. Tables are used for presenting numerical or categorized information in a compact and easy-to-read format.
Differentiate the following parts of a technical report:
➢ Annex vs. Appendix
Annex: An additional section or attachment that contains supplementary material related to the main content of the report. It often includes large datasets, detailed calculations, or references that support the main body but are too detailed to be included within the main text.
Appendix: Similar to an annex, an appendix also contains supplementary information that is relevant but not critical to the main discussion. However, appendices are often more narrative or explanatory in nature, providing additional context, background information, or clarifications that support the text.
refers to the concentration of valuable mineral (such as gold, copper, etc.) in the ore as it enters the processing plant (the mill). It’s the average grade of the ore before any processing or extraction takes place
Mill Head Grade
