Chemistry · Science General

Metallurgical Processes

1,436 Questions

This section explores key metallurgical processes including ore concentration, pyrometallurgy, and metal refining. It also covers corrosion and the properties of refractory materials. These chemistry questions are relevant for engineering and science entrance tests.

Pyrometallurgy furnacesMetal refining techniquesCorrosion protection methodsOre concentrationAuto reduction process

Metallurgical Processes Questions

Multiple choice

Acids are never stored in metal containers because

  1. they react with metals to form gases

  2. they react with metals and explode

  3. they corrode very fast in metals

  4. they gradually corrode and eat up the metal container

  5. they form protective layer around metals and stop reacting further
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. Acids are never stored in metal containers because they gradually corrode and eat up the metal container.

Multiple choice

Copper can be converted into gold by

  1. Artificial radioactivity

  2. Heating

  3. Electroplating

  4. Chemical Reaction

  5. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

this is the only way to change copper into gold would be to add 50 protons to the nucleus.

Multiple choice

Among the following compounds __________ is used as an intermediate in the production of purified germanium metal.

  1. germanium tetrachloride

  2. germanium monoxide

  3. germanium dioxide

  4. germanium disulfide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Germanium tetrachloride is a colourless liquid used as an intermediate in the production of purified germanium metal. In recent years the usage of GeCl4 has increased substantially due to its use as a reagent for fibre optic production.

Multiple choice

Which of the following rolling processes occur above the recrystallization temperature of the metal?

  1. Hot rolling

  2. Cold rolling

  3. Flat rolling

  4. Foil rolling
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hot rolling is a metalworking process that occurs above the recrystallization temperature of the material. After the grains deform during processing, they recrystallize, which maintains an equiaxed microstructure and prevents the metal from work hardening.

Multiple choice

Which of the following furnaces is used to make wrought iron from the pig iron?

  1. Electric arc furnace

  2. Induction furnace

  3. Reverberatory furnace

  4. Puddling furnace
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The puddling furnace is a metalmaking technology used to make wrought iron or steel from the pig iron produced in a blast furnace. The furnace is constructed to pull the hot air over the iron without it coming into direct contact with the fuel. The major advantage of this system is keeping the impurities of the fuel separated from the charge.

Multiple choice

Which of the followiing metallurgical methods is based on the thermal treatment of minerals and metallurgical ores ?

  1. Powder metallurgy

  2. Archaeometallurgy

  3. Pyrometallurgy

  4. Carbonyl metallurgy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pyrometallurgy is a branch of extractive metallurgy. It consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals.