Chemical Engineering Basics

411. Metal shots used in shot blasting are made of

1. Stellite
2. Steel
3. Bronze
4. Lead

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412. Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.

1. Invar
2. Hastelloy
3. Duralumin
4. Monel metal

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413. Metalloids

1. Are good conductor of heat & electricity
2. Act as electron donors with metals & as electron acceptor with non-metals
3. Are not necessarily solids at room temperature
4. Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

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414. Methyl orange indicator turns

1. Orange yellow in alkaline medium
2. Orange yellow in acidic medium
3. Colourless in acidic medium
4. Colourless in basic medium

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415. Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.

1. Scratch
2. Indentation
3. Dynamic
4. Rebound

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416. Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of

1. Lumps
2. Pellets
3. Briquettes
4. Sinter

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417. Mild steel has __________ crystal lattice structure.

1. Face centred cubic (fcc)
2. Body centred cubic (bcc)
3. Orthorhombic
4. Cubic

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418. Milk is fat dispersed in water. It is an example of

1. Suspension
2. Emulsion
3. Gel
4. Solution

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419. Minimum number of members required to form a Public Limited Joint Stock Com-pany is

1. 7
2. 10
3. 12
4. 17

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420. Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)

1. H
2. H/2
3. H/4
4. H/6

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