Chemical Engineering Basics

391. LVDT used for displacement measurement is a/an __________ transducer.

1. Passive
2. Active
3. Capacitive
4. None of these

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392. M10 index of coke indicates its

1. Compressive strength
2. Hardness
3. Abrasion resistance
4. Impact strength

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393. Machinability of hard alloys and tool steels is improved by

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

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394. Magnesium is present in

1. Haemoglobin
2. Chlorophyll
3. Hypo solution
4. None of these

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395. Magnetic permeability of iron is increased by its

1. Decarburising
2. Alloying with cobalt
3. Purification
4. Alternate heating & cooling

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396. Main constituent of bone ash is

1. Ammonium phosphate
2. Calcium phosphate
3. Animal charcoal
4. Ammonium sulphate

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397. Maraging steels derive their strength from the following mechanism:

1. A fine, highly dislocated and strong martensite
2. Fine dispersions of inter-metallic of Fe, Ni, Ti etc
3. Fine dispersions of alloy carbides in a ferrite matrix
4. Fine dispersions of Fe3 C nucleated on dislocations in austenite

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398. Material of construction of foundry crucible is

1. Lead
2. Stainless steel
3. Graphite
4. Cast iron

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399. Material of construction of the electrode used in the electric resistance welding is

1. Stainless steel
2. Graphite
3. Copper
4. Steel

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400. Materials having __________ lattice structure are usually the most ductile.

1. Body centred cubic (bcc)
2. Hexagonal close packed (hcp)
3. Face centred cubic (fcc)
4. None of these

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