Repository logo

Browsing by Subject "tests"

Filter results by typing the first few letters
Now showing 1 - 3 of 3
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Jakość krajowych kruszyw
    (Wydawnictwa AGH, 2010) Góralczyk, Stefan; Kukielska, Danuta
    General information on aggregates industry and resources base has been presented. The division of aggregates, requirements and testing methods have been included along with comparative quality analysis. The analysis involved 100 rage of aggregates produced by 95 producers. The aggregates have been tested by IMBiGS in the years 2006-2010. For the analysis, accepted results concerned fraction 8/16. The research were representative for all types of aggregates produced in Poland. The analysis involved basic technological properties of aggregates such as resistance to crushing, grindability, thermal shock resistance, absorbability and freeze resistance. The values gained for particular properties have been related to Standards PN-EN 12620 and PN-EN 13043. The quality of produced in Poland aggregates has been presented basing on the tests results. The quality of the aggregates has been related to the expectations connected with planned investments. The possibility of expanding raw materials base beyond traditional applied materials has been presented.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Selected test methods for pipes and manholes used in mining areas
    (Wydawnictwa AGH, 2020) Pacześniowski, Krzysztof; Kalisz, Piotr Józef
    As a result of underground deposit extraction, the pipes and manholes that constitute the basic elements of sewage systems are subjected to the influence of near-surface soil layer deformations at the place of their installation. For this reason, these elements intended for the construction of sewage systems in mining areas must fulfil special requirements related to the occurrence of additional loads and displacements. This article presents the pipe and manhole test methods developed at the Central Mining Institute, with a particular focus on elements of large sizes. The results of these tests are applied to assess the suitability of pipes and manholes for use in mining areas.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zagadnienia ilościowej oceny poziomu wiedzy fachowej w górnictwie nafty i gazu
    (2009) Bednarz, Stanisław; Rzyczniak, Mirosław
    The considerations on test exams usability for knowledge effective examination and skills of large group of persons in short period are described in the article. Probability changes of test passing without knowledge required are specified in form of diagrams and tables including such parameters as: test questions number, answers variants number and required percent of correct answers assuming the same weight of all questions answered.