Melting point of Iron?

Melting point of Iron?
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The filament of an electric lamp becomes white hot but the lead-in wires holding the filament are only slightly heated because they (a) have smaller current passing through them (b) have very low resistance (c) have higher melting point (d) are made of black iron

Description : The filament of an electric lamp becomes white hot but the lead-in wires holding the filament are only slightly heated because they (a) have smaller current passing through them (b) have very low resistance (c) have higher melting point (d) are made of black iron

Last Answer : Ans:(b)

Presence of high phosphorous in cast iron increases its (A) Fluidity (B) Melting point (C) Shrinkage (D) Tensile strength

Description : Presence of high phosphorous in cast iron increases its (A) Fluidity (B) Melting point (C) Shrinkage (D) Tensile strength

Last Answer : (A) Fluidity

The presence of impurities in iron (A) Increases its melting point (B) Does not affect its melting point (C) Decreases its melting point (D) Makes it malleable

Description : The presence of impurities in iron (A) Increases its melting point (B) Does not affect its melting point (C) Decreases its melting point (D) Makes it malleable

Last Answer : (C) Decreases its melting point

Which of the following is a low melting point metal? (A) Stainless steel (B) Wrought iron (C) Tin (D) Copper

Description : Which of the following is a low melting point metal? (A) Stainless steel (B) Wrought iron (C) Tin (D) Copper

Last Answer : (C) Tin

Which has the maximum melting point out of the following? (A) Steel (B) Cast iron (C) Stainless steel (D) Wrought iron

Description : Which has the maximum melting point out of the following? (A) Steel (B) Cast iron (C) Stainless steel (D) Wrought iron

Last Answer : (D) Wrought iron

As the impurities are oxidised, the melting point of iron (A) Decreases (B) Remains unchanged (C) Increases (D) May increase or decrease; unpredictable

Description : As the impurities are oxidised, the melting point of iron (A) Decreases (B) Remains unchanged (C) Increases (D) May increase or decrease; unpredictable

Last Answer : (C) Increases

Which of the following will have the highest melting point? (A) Pig iron (B) Mild steel (C) Wrought iron (D) High carbon stee

Description : Which of the following will have the highest melting point? (A) Pig iron (B) Mild steel (C) Wrought iron (D) High carbon stee

Last Answer : (C) Wrought iron

Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process? (A) Galvanising (B) Tinning (C) Sherardizing (D) None of these

Description : Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process? (A) Galvanising (B) Tinning (C) Sherardizing (D) None of these

Last Answer : (C) Sherardizing

Which of the following does not have a sharp melting point? (A) Thoria (B) Glass (C) Ice (D) Pig iron

Description : Which of the following does not have a sharp melting point? (A) Thoria (B) Glass (C) Ice (D) Pig iron

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Statement-1:Cast iron is different from pig iron. Statement-2: Cast iron is made by melting pig iron with scrap iron and coke using hot air blast and

Description : Statement-1:Cast iron is different from pig iron. Statement-2: Cast iron is made by melting pig iron with scrap iron and coke using hot air blast and

Last Answer : Statement-1:Cast iron is different from pig iron. Statement-2: Cast iron is made by melting pig ... Statement-1 is false but Statement -2 is true

Why is it a poor practice to use a high wattage soldering iron when soldering or desoldering components on a printed circuit board? A. The circuit board will blister and warp. B. The foil wire bonded to the board may come loosened from the board. C. The circuit board has a low melting temperature. D. The solder is kept to a dull heat dissipating finish.

Description : Why is it a poor practice to use a high wattage soldering iron when soldering or desoldering components on a printed circuit board? A. The circuit board will blister and warp. B. The foil wire bonded ... board has a low melting temperature. D. The solder is kept to a dull heat dissipating finish.

Last Answer : Answer: B

Sulphur melting pit in the sulphuric acid plant is made of (A) Lead lined stainless steel (B) Cast iron (C) Steel or cement-brick lined (D) Hard wood

Description : Sulphur melting pit in the sulphuric acid plant is made of (A) Lead lined stainless steel (B) Cast iron (C) Steel or cement-brick lined (D) Hard wood

Last Answer : (C) Steel or cement-brick lined

Tank furnace used for melting of glass is made of (A) Mild steel (B) Cast iron (C) Refractory blocks (D) Stainless steel

Description : Tank furnace used for melting of glass is made of (A) Mild steel (B) Cast iron (C) Refractory blocks (D) Stainless steel

Last Answer : (C) Refractory blocks

For melting one tonne of cast iron (A) 700 m3 air is required (B) 20 kg limestone is required (C) One quintal coke is required (D) All the above

Description : For melting one tonne of cast iron (A) 700 m3 air is required (B) 20 kg limestone is required (C) One quintal coke is required (D) All the above

Last Answer : Answer: Option D

In a 100 TPD Sponge Iron plant, the sponge iron is fed to the Induction melting furnace, producing molten steel at 88% yield. The Energy consumption details are as follows: Coal Consumption : 130 TPD GCV of coal : 4500 kcal/kg Power Purchased from Grid : 82400 kWh / day Specific Energy consumption for Kiln producing Sponge Iron: 120 kWh / ton sponge iron Calculate the following 1. Specific Energy Consumption of Induction melting furnace in terms of kWh/ton of molten steel 2. Specific Energy Consumption of the entire plant, in terms of kcal/kg of molten steel (product). 3. Total Energy Consumption of Plant in Tons of Oil Equivalent (TOE )

Description : In a 100 TPD Sponge Iron plant, the sponge iron is fed to the Induction melting furnace,  producing molten steel at 88% yield. The Energy consumption details are as follows: Coal Consumption : 130 ... molten  steel (product). 3. Total Energy Consumption of Plant in Tons of Oil Equivalent (TOE )

Last Answer :  a) Specific Energy Consumption of Induction Melting Furnace  Molten Steel Production from the Induction melting furnace per day  = 100 x 88/100 = 88 TPD Total Energy Consumption of the Plant = 82400 kWh ... mark c) Total Energy consumption of Plant in ToE  = 655864000/107  = 65.586 ToE

The material used for a fuse wire should have (a) high resistivity (b) high ductility (c) high melting point (d) low melting point

Description : The material used for a fuse wire should have (a) high resistivity (b) high ductility (c) high melting point (d) low melting point

Last Answer : Ans:(d)

Metals are good conductors of electricity because (a) The contain free electrons (b) The atoms are lightly packed (c) They have high melting point (d) All of the above

Description : Metals are good conductors of electricity because (a) The contain free electrons (b) The atoms are lightly packed (c) They have high melting point (d) All of the above

Last Answer : Ans:(b)

The point at which the solid, liquid and gaseous forms of a substance co-exist is called its (a) boiling point (b) melting point (c) triple point (d) freezing point

Description : The point at which the solid, liquid and gaseous forms of a substance co-exist is called its (a) boiling point (b) melting point (c) triple point (d) freezing point

Last Answer : Ans:(c)

Which of the following characteristics is not typical of ionically bonded crystals? (a) Has no sharp melting point (b) Cleave into definite cleavage planes (c) Conducts when melted (d) Shatters when crystal is distorted

Description : Which of the following characteristics is not typical of ionically bonded crystals? (a) Has no sharp melting point (b) Cleave into definite cleavage planes (c) Conducts when melted (d) Shatters when crystal is distorted

Last Answer : Ans:(a)

The melting point of copper is (a) 1083°C (b) 732°C (c) 327°C (d) 1835°C

Description : The melting point of copper is (a) 1083°C (b) 732°C (c) 327°C (d) 1835°C

Last Answer : Ans:(a)

The point at which the solid, liquid and gaseous forms of a substance co-exist is called its (a) Boiling point (b) Melting point (c) Triple point (d) Freezing point

Description : The point at which the solid, liquid and gaseous forms of a substance co-exist is called its (a) Boiling point (b) Melting point (c) Triple point (d) Freezing point

Last Answer : Ans:(c)

Alloy having low melting point?

Description : Alloy having low melting point?

Last Answer : Solder

Melting point of gold?

Description : Melting point of gold?

Last Answer : 10640C (19470F)

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Description : The metal with lowest melting point (-39'C)?

Last Answer : Mercury

Heating the ore below its melting point in the absence of air I to remove volatile impuri- ties is known as?

Description : Heating the ore below its melting point in the absence of air I to remove volatile impuri- ties is known as?

Last Answer : Calcination

Method of separating metals which have low melting point I from an ore is?

Description : Method of separating metals which have low melting point I from an ore is?

Last Answer : Liquation

The metal having lowest melting point?

Description : The metal having lowest melting point?

Last Answer : Mercury

The melting point of ice is-----? A. 00C (Answer) B. 1000C C. 40C

Description : The melting point of ice is-----? A. 00C (Answer) B. 1000C C. 40C

Last Answer : A. 00C (Answer)

Covalent network crystals have-------? A. higher melting point then molecular crystals (Answer) B. lower melting point then molecular crystals C. discrete molecules linked by Van der waals forces D. hydrogen bonding

Description : Covalent network crystals have-------? A. higher melting point then molecular crystals (Answer) B. lower melting point then molecular crystals C. discrete molecules linked by Van der waals forces D. hydrogen bonding

Last Answer : A. higher melting point then molecular crystals (Answer)

Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z? A) Has high melting point B) Has low melting point C) Conducts electricity in molten state D) Occurs as solid

Description : Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z? A) Has high melting point B) Has low melting point C) Conducts electricity in molten state D) Occurs as solid

Last Answer : B) Has low melting point

Why does the temperature of a substance remain constant during its melting point or boiling point? -Maths 9th

Description : Why does the temperature of a substance remain constant during its melting point or boiling point? -Maths 9th

Last Answer : The extra heat supplied to the boiling water is used in the vaporization of a liquid, which is known as the latent heat of vaporization. That's why the temperature of a substance remains constant during its melting or boiling.

Why does the temperature of a substance remain constant during its melting point or boiling point? -Maths 9th

Description : Why does the temperature of a substance remain constant during its melting point or boiling point? -Maths 9th

Last Answer : The temperature of a substance remains constant during melting and boiling points till the completion of melting and boiling. It is because substance makes use of latent heat of fusion ... between particles of liquid to change into vapours during boiling. Therefore, temperature remains constant.

Which of the following has highest melting point? Ni, Fe, Pt, W. -Chemistry 9th

Description : Which of the following has highest melting point? Ni, Fe, Pt, W. -Chemistry 9th

Last Answer : i think all are equal

Which substance does not have a melting point? -General Knowledge

Description : Which substance does not have a melting point? -General Knowledge

Last Answer : The answer is 'Glass'

Which substance does not have a melting point? -General Knowledge

Description : Which substance does not have a melting point? -General Knowledge

Last Answer : Mercury exists in liquid state hence, it has no melting point.

Which substance does not have a melting point? -General Knowledge

Description : Which substance does not have a melting point? -General Knowledge

Last Answer : Mercury exists in liquid state hence, it has no melting point.

What is the melting point of FeCl3 F?

Description : What is the melting point of FeCl3 F?

Last Answer : The melting point of ferric chloride is 307.6 d. She. Or 585.68 d. Fahrenheit. (Approximately)

What is the melting point of titanium ?

Description : What is the melting point of titanium ?

Last Answer : Titanium has a melting point of 1677 degrees Celsius.

What is the melting point of scandium ?

Description : What is the melting point of scandium ?

Last Answer : Scandium has a melting point of 1541 degrees Celsius.

What is the melting point of helium ?

Description : What is the melting point of helium ?

Last Answer : The melting point of helium is minus 272 degrees Celsius.

What is the melting point of hydrogen ?

Description : What is the melting point of hydrogen ?

Last Answer : The melting point of hydrogen is minus 259 degrees Celsius.

What is the melting point of calcium ?

Description : What is the melting point of calcium ?

Last Answer : The melting point of calcium is 848 degrees Celsius.

What is the melting point of potassium ?

Description : What is the melting point of potassium ?

Last Answer : The melting point of potassium is 64 degrees Celsius.

What is the melting point of argon ?

Description : What is the melting point of argon ?

Last Answer : Argon melting point - 189 degrees Celsius.

What is the melting point of chlorine ?

Description : What is the melting point of chlorine ?

Last Answer : Melting point of chlorine - 101 degree Celsius.

What is the melting point of sulfur ?

Description : What is the melting point of sulfur ?

Last Answer : The melting point of sulfur is 113 degrees Celsius.

What is the melting point of phosphorus ?

Description : What is the melting point of phosphorus ?

Last Answer : The melting point of phosphorus is 44 degrees Celsius.

What is the melting point of silicon ?

Description : What is the melting point of silicon ?

Last Answer : Silicon has a melting point of 1420 degrees Celsius.

What is the melting point of aluminum ?

Description : What is the melting point of aluminum ?

Last Answer : Aluminum has a melting point of 660 degrees Celsius.

What is the melting point of magnesium ?

Description : What is the melting point of magnesium ?

Last Answer : Magnesium has a melting point of 650 degrees Celsius.