Chemical Engineering Basics

561. Suitability of steel for its use in cable is judged by its strength in

1. Tension
2. Compression
3. Torsion
4. Shear

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562. Super conduction in metals is observed at a temperature of __________ °K.

1. <100
2. >100
3. About 273
4. About 373

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563. Superheating of steam is done at constant

1. Enthalpy
2. Entropy
3. Pressure
4. Volume

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564. Surface tension of a liquid

1. Is due to intermolecular forces of cohesion
2. Decreases with rise in temperature
3. Is responsible for the spherical shape of an isolated liquid drop
4. All (A), (B) & (C)

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565. Temper brittleness of a material can be fairly detected by the __________ test.

1. Fatigue
2. Notched bar impact
3. Tensile
4. Hardness

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566. Temperature attained in soldering of metals is about __________ °C.

1. 150-300
2. 400-500
3. 650-800
4. 1000-1100

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567. Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

1. Copper
2. Steel
3. Aluminium
4. Brass

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568. Tempering of a material does not improve its

1. Machinability
2. Toughness
3. Internal stress level
4. Softness

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569. Tesla metre per ampere (T. m/A) is the unit for the measurement of

1. Magnetic susceptibility
2. Magnetic moment
3. Permeability of free space
4. Flux density

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570. The 'laughing gas' is

1. Nitrous oxide
2. Nitric oxide
3. Nitrogen trioxide
4. Nitrogen pentoxide

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