Process Equipment and Plant Design

311. The thermal stress in a metallic bar does not depend upon the

1. Changes in temperature
2. Cross-sectional area
3. Both (A) and (B)
4. Neither (A) nor (B)

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312. The thickness of heat transfer plates used in the plate type heat exchanger ranges from _________ mm, pressed in a single piece provided with grooves & corrugations.

1. 0.3 to 0.8
2. 1.25 to 3.125
3. 3.5 to 7.0
4. 8 to12

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313. The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally _________ the tube wall thickness.

1. Equal to
2. Twice
3. Four times
4. Half

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314. The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is _________ stress.

1. Shear
2. Tensile
3. Compressive
4. Thermal

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315. The units of Young's modulus of elasticity and _________ are the same.

1. Strain
2. Stress
3. Modular ratio
4. None of these

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316. The value of fouling factor depends upon the

1. Characteristic of process fluid
2. Velocity of process fluid containing suspended solids
3. Suspended solids in the fluid
4. All (A), (B) and (C)

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317. The wall thickness for a large high pressure pipeline is determined by the consideration of the

1. Axial tensile stress in the pipe
2. Forces exerted by static and dynamic action at bends
3. Circumferential pipe-wall tension
4. Temperature stresses

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318. The wall thickness of thin cylindrical shell with hemispherical ends is _________ that of the spherical ends.

1. Equal to
2. More than
3. Less than
4. Either (B) or (C); depends on maximum permissible internal pressure

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319. Theoretically calculated diameter of the stripping section of the continuous rectification column is _________ that of the enriching section.

1. Less than
2. More than
3. Same as
4. Either more or less (depending upon relative volatility)

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320. Thickness of the frame of a plate and frame filter as compared to that of plates is

1. Less
2. Same
3. More
4. Either (A) or (B)

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