Chemical Engineering Basics

581. The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.

1. Refrigerant cooling
2. Evaporator
3. Condenser
4. Throttling

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582. The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the

1. Work hardening
2. Bauschinger effect
3. Creeping effect
4. Stress recovery effect

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583. The best guide to judge the general quality of water is the measurement of its

1. pH value
2. Electrical conductivity
3. Turbidity
4. Dissolved oxygen content

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584. The best lubricants for a machine working at high temperature & load is

1. Grease
2. Solid lubricant
3. Animal oils
4. Mineral oils

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585. The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.

1. 140
2. 180
3. 240
4. 280

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586. The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.

1. Tension
2. Shear
3. Compression
4. Bending & tension

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587. The burnout heat flux in the nucleate boiling regime is not a function of the

1. Liquid density
2. Vapour density
3. Temperature difference
4. Heat of evaporation

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588. The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the

1. Ability to absorb shock
2. Capacity to store energy
3. Ratio of the wire & coil diameters
4. Load to produce unit deflection

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589. The cathode in an electrochemical cell always carries

1. Negative charge
2. Positive charge
3. Zero charge
4. Positive or negative charge depending upon the nature of the cell

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590. The concentration of (H+) ions is 4 x 10^-5 in a solution. Then pH of the solution will be (Given log 4 = 0.6)

1. 4.4
2. 5.6
3. 8.4
4. 2.4

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