Chemical Engineering Basics

801. Which of the following is used to produce draught in the locomotive boilers?

1. Chimney
2. Induced draught fan
3. Forced draught fan
4. Steam jet arrangement

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802. Which of the following low melting alloy containing bismuth and lead is used for electric fuse?

1. Wood's metal
2. Babbitt metal
3. Monel metal
4. Duralumin

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803. Which of the following mainly decides the current to be employed is arc welding?

1. Electrode size
2. Plate thickness
3. Voltage across the arc
4. Welded portion length

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804. Which of the following material handling equipments is not suitable for moving materials in varying paths?

1. Hand trolley
2. Belt conveyor
3. Crane
4. Truck

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805. Which of the following materials does not form adherent oxide film on surface?

1. Copper
2. Nickel
3. Aluminium
4. Gold & silver

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806. Which of the following materials has the least scrap value?

1. Aluminium
2. Stainless steel
3. Brass
4. Copper

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807. Which of the following materials has the maximum shrinkage allowance?

1. Brass
2. Cast iron
3. Lead
4. Aluminium alloy

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808. Which of the following materials has the poorest electrical conductivity?

1. Carbon
2. Aluminium
3. Silver
4. Stainless steel

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809. Which of the following metals cannot be hot worked at room temperature?

1. Zinc
2. Nickel
3. Lead
4. Tin

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810. Which of the following metals is not subjected to electrolytic refining/purification?

1. Copper
2. Zinc
3. Tin
4. Aluminium

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