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Which of the following facts is/are correct about the blast furnace in Iron metallurgy? Limestone is added to the blast furnace to reduce the iron oxide in the ore to iron. Coke is added to the blast furnace to physically separate iron from other impurities. Carbon dioxide reduces to carbon monoxide.
A taxi service company has 20 outstation taxi, 25 prime taxi and 40 mini taxi. The fixed monthly rent of all the taxies is Rs. 180,000. It costs Rs. 100, Rs. 80 and Rs. 50 per day towards the maintenance of each outstation taxi, prime taxi and mini taxi, respectively. They charge Rs. 2000, Rs. 500 and Rs. 100 per day to rent an outstation taxi, prime taxi and mini taxi, respectively. In month of June 2020, only 5% of outstation taxi, 20% of prime taxi and 50% of mini taxi were booked. Then, what is the profit or loss percent for July 2020?
In the blast furnace, as the oxygen percentage in air blast increases, the
P. flame temperature increases
Q. blast volume increases
R. blast volume decreases
S. flame temperature decreases
A mini-van crosses two people walking at the speed of 4.8 kmph and 6 kmph in the same direction as that in which the mini-van is heading in 4.5 s and 9 s, respectively. What is the length of the mini-van?
Grey pig is produced when the blast furnace is not provided with sufficient fuel while the white pig is produced when the blast furnace is provided sufficiently with fuel.
Temperature of blast furnace gas emanating from blast furnace is about . . . . . . . . degree C
Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.
Consider the following statements for an induction furnace: 1. High-frequency current is generally used for the furnace working. 2. There is less loss of alloying elements due to oxidation. 3. Pronounced stirring action of molten metal occurs inside the furnace. 4. Slag cover is essential for the efficient working of the furnace. Which of the above statements are correct?
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.
What do we call the product after the agglomeration process, which can be used as a blast in a blast furnace?