Chemical Engineering Basics

771. Which of the following has the least value of ultimate tensile strength (UTS)?

1. Medium carbon steel
2. High carbon steel
3. Cast iron
4. Wrought iron

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772. Which of the following heat treatment processes is usually applied to castings?

1. Tempering
2. Annealing
3. Normalising
4. Carburising

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773. Which of the following if present in iron ore, enhances its value?

1. Alumina
2. Alkali oxide
3. Lime & Magnesia
4. None of these

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774. Which of the following is a boiler accessory i.e., not a boiler mounting?

1. Blow off cock
2. Feed check valve
3. Feed water pump
4. Stop valve

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775. Which of the following is a commonly used manometric liquid for low pressure range?

1. Ethyl alcohol
2. Carbon tetrachloride
3. Glycerol
4. Ethylene glycol

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776. Which of the following is an acidic constituent of B.F. slag?

1. SiO₂
2. FeO
3. MgO
4. CaO

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777. Which of the following is an example of cathodic protection of metals against corrosion?

1. Painted steel
2. Galvanised iron
3. Case hardened steel
4. Lead lined reactor

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778. Which of the following is an example of stress corrosion?

1. Season cracking of brass
2. Caustic embrittlement of steel
3. Both (A) & (B)
4. Neither (A) nor (B)

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779. Which of the following is an ore dressing operation?

1. Classification
2. Smelting
3. Roasting
4. None of these

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780. Which of the following is an unconventional source of energy?

1. Thermal power
2. Hydroelectric power
3. Nuclear-fusion power
4. Solar power

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