Related Questions

There is practically no alternative/competitor to __________ in the beneficiation treatment of sulphide ores.
A Classification
B Tabling
C Jigging
D Froth floatation
Calcination of iron ores is done
A To remove moisture
B To remove carbonic acid
C By roasting in heaps
D All the above
Roasting of metallurgical ores is done mainly to
A Dehydrate it
B Sinter the ore
C Remove CO2 & H2O
D Remove arsenic & sulphur
A survey was conducted among the students of Khulna University to find out how many forms of physical exercise usually swam, 25% said they usually did jogging, 20% said they played cricket, 15% said they usually played football and 20 respondents said they did not take any form of exercise. From the above findings it can be concluded that.
A The student of khulna University do not usually take physical exercise.
B No respondent took more than one form of exercise.
C The method of data collection was not valid.
D Some of the respondents took more than one form of exercise.
The alloying element which reduces the formation of iron sulphide in steel is
A Chromium
B Nickel
C Vanadium
D Manganese
The product (s) of roasting of a sulphide ore is (are)
A Oxide only
B Sulphate only
C Oxide and sulphate
D Dependent on temperature and partial pressure of oxygen & sulphur dioxide
Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?
A Copper
B Mercury
C Lead
D None of these
Zinc sulphide is commonly used as
A Fungicide
B Herbicide
C Rodenticide
D Deodorant
The sewer which resists sulphide corrosion, is
A Brick sewer
B Cast iron sewer
C R.sewer
D Lead sewer
Which one of the following resists hydrogen sulphide corrosion?
A R.C.C.
B Glazed stone wares
C Asbestos cement
D Glazed ware

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