Related Questions

In a annutal behavior experiment , 50 tagged white pigeons and 200 tagged gray pigeons were released from a laboratory. Within one week, 88 percent of the white pigeons and 80.5 percent of the gray pigeons had returned to the laboratory. what percent of the total number of piegens returned to the laboratory?
A 80.5%
B 82.5%
C 82%
D 85%
The National Chemical Laboratory (India) is located in
A Mumbai
B Bangaluru
C Hyderabad
D Pune
The fuel mostly used in cement industry and in metallurgical processes is
A wood charcoal
B bituminous cock
C pulverized coal
D coke
Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?
A Pyrometer
B Thermocouple
C Thermometer
D Thermistor
The metallurgical process in which a metal is obtained in a fused state is called
A smelting
B roasting
C calcinations
D froth floatation
Volatile matter content of metallurgical coke may be around __________ percent.
A 1-2
B 10-15
C 22-26
D 30-33
Quantity of coke produced from metallurgical coal may be around __________ percent.
A 30
B 50
C 75
D 95
__________ is an ore concentrating metallurgical process involving a chemical change.
A Electromagnetic separation
B Froth floatation
C Roasting
D None of these
Roasting of metallurgical ores is done mainly to
A Dehydrate it
B Sinter the ore
C Remove CO2 & H2O
D Remove arsenic & sulphur
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?
A NOx
B Hg
C SO2
D F

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