Металлургия редких и благородных металлов 1
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Specialty
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University
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Olga Nosova
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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Минерал ферберит:
FeWO4
MnWO4
CaWO4
PbWO4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Выщелачивание молибденового огарка ведут раствором соды с ее расходом:
90% от теоретического
100% от теоретического
с избытком 1-9% от теоретического
с избытком 10-30% от теоретического
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Температура плавления тантала, 0С:
2500
3500
3000
4000
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Основной минерал титана, имеющий промышленное значение:
вюстит
ильменит
халькопирит
магнетит
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Молярная масса атомов галлия, составляет в г/моль:
57
50
70
69
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
К какой группе по технической классификации относится вольфрам?
тугоплавкие
редкоземельные
легкие
радиоактивные
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Плотность чистого молибдена в г/см3 составляет:
5,1
4,1
4,7
6,5
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