Related Questions

Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.
A 1800
B 2200
C 2400
D 2700
Commercial production of calcium carbide requires limestone and __________ as raw materials.
A Coke
B Sand
C Soda ash
D Fuel oil
আদ্র বাতাসের সংস্পর্শে ক্যালশিয়াম কার্বাইড নিম্নের কোন যৌগটি উৎপন্ন করে? (Which of the following compound is produced when calcium carbide gets contact with moist air?)
A Ethene
B Ethane
C Ethyne
D Ethanal
আর্দ্র বাতাসের সংস্পর্শে ক্যালশিয়াম কার্বাইড নিম্নের কোন যৌগটি উৎপন্ন করে? (Which of the following compound is produced when calcium carbide gets contact with moist air?)
A Ethene
B Ethane
C Ethyne
D Ethanal
Main product in calcium carbide-water reaction is
A Ca(OH)2
B C2H2
C CO2
D CaCO3
Reaction of calcium carbide with water produces a gas, which is used
A As an illuminant
B For metal cutting/welding
C Both A & B
D Neither A nor B
Coke used for the production of calcium carbide should have
A Low ash content
B Low ignition temperature
C High electrical resistivity
D All of the above
Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by
A Increasing the draft in the furnace
B Preheating the fuel gas
C Oxygen enrichment of combustion air
D Preheating the combustion air
Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.
A Low amount of excess combustion air
B Large quantity of excess combustion air
C Hydrocarbon fuel
D Pulverised coal as fuel
The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.
A Arc
B Resistance
C Low frequency induction
D High frequency induction

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