QUES: Safety testing of mine shaft elevator rails is routinely undertaken. The method involves destructive testing of a segment of the cable. The ends of the segment are frayed, then set in conical zinc molds. Each end of the segment is then secured in a large, hydraulic stretching machine. The segment is then placed under increasing load to the point of failure. Data about elasticity, load, and other factors is compiled and a report is produced. The report is then analyzed to determine whether or not the entire rail is safe to use.
Afterwards, what type of machine is the segment secured in?

ANS: hydraulic stretching machine

QUES: In 2008, Bloomberg claimed child labour in copper and cobalt mines that supplied Chinese companies in Congo. The children are creuseurs, that is they dig the ore by hand, carry sacks of ores on their backs, and these are then purchased by these companies. Over 60 of Katanga's 75 processing plants are owned by Chinese companies and 90 percent of the region's minerals go to China. An African NGO report claimed 80,000 child labourers under the age of 15, or about 40% of all miners, were supplying ore to Chinese companies in this African region. Amnesty International alleged in 2016 that some cobalt sold by Congo Dongfang Mining was produced by child labor, and that it was being used in lithium-ion batteries powering electric cars and mobile devices worldwide.
What are child creuseurs?

ANS: they dig the ore by hand, carry sacks of ores on their backs

QUES: Characteristic birds of the forest are wild turkey (Meleagris gallopavo silvestris), ruffed grouse (Bonasa umbellus), mourning dove (Zenaida macroura), common raven (Corvus corax), wood duck (Aix sponsa), great horned owl (Bubo virginianus), barred owl (Strix varia), screech owl (Megascops asio), red-tailed hawk (Buteo jamaicensis), red-shouldered hawk (Buteo lineatus), and northern goshawk (Accipiter gentilis), as well as a great variety of "songbirds" (Passeriformes), like the warblers in particular.
What is the scientific name of the wild raven?

ANS: unanswerable

QUES: The Thuringian Realm existed until 531 and later, the Landgraviate of Thuringia was the largest state in the region, persisting between 1131 and 1247. Afterwards there was no state named Thuringia, nevertheless the term commonly described the region between the Harz mountains in the north, the Weiße Elster river in the east, the Franconian Forest in the south and the Werra river in the west. After the Treaty of Leipzig, Thuringia had its own dynasty again, the Ernestine Wettins. Their various lands formed the Free State of Thuringia, founded in 1920, together with some other small principalities. The Prussian territories around Erfurt, Mühlhausen and Nordhausen joined Thuringia in 1945.
Which dynasty formed before the Treaty of Leipzig?

ANS:
unanswerable