Chemical Engineering Basics

381. Lead is poured into the joint between two __________ pipes.

1. Mild steel
2. Concrete
3. Cast iron
4. Asbestos cement

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382. Fibre glass is a composite material of

1. Glass fibre in a polymer matrix
2. Glass fibre in a metallic matrix
3. Polymer fibre in a glassy matrix
4. Both 'b' & 'c'

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383. Lead is poured into the joints between two __________ pipes.

1. Cast iron
2. Steel
3. Concrete
4. Plastic

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384. Lead pencil contains

1. Graphite
2. Lead sulphide
3. Lead
4. Both (B) & (C)

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385. Leakage in a cooking gas cylinder is detected by

1. Radio-isotopes
2. Pouring soap solution on the surface and locating the gas bubbles
3. Halide torch
4. Pungent smell of mercaptans present in the gas

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386. Limestone addition in the blast furnace is done to flux __________ present in the raw materials.

1. SiO₂
2. Al₂O₃
3. MnO₂
4. P

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387. Limestone is added in the blast furnace (during pig iron manufacture) to

1. Form slag by combining with impurities
2. Supply heat by undergoing exothermic reaction with impurities
3. Reduce the coke consumption
4. Reduce slag viscosity

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388. Liquid nitrogen containers can be made from

1. Ferritic stainless steel
2. HSLA steel
3. Titanium
4. Austenitic stainless steel

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389. Liquor poisoning generally occurs due to the presence of __________ in it.

1. Ethyl alcohol
2. Impurities
3. Methyl alcohol
4. Carbonic acid

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390. Load cells used for the measurement of weight has

1. Compact & rugged construction with an accuracy of 0.1 to 1%
2. No moving parts and incurs negligible deflection under load
3. Provision of thermal compensation and is hermetically sealed
4. All 'a', 'b' & 'c'

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