Process Equipment and Plant Design

301. The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always

1. 1
2. < 1
3. > 1
4. Equal to the order of reaction

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302. The ratio, (propeller agitator dia/tank dia) is normally taken as

1. 0.15-030
2. 0.5-0.65
3. 0.75-0.85
4. 0.60-0.90

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303. The retention time of material in a rotary dryer depends upon its

1. rpm
2. Slope & length
3. Flights arrangement
4. All (A), (B) and (C)

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304. The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about _________ kms.

1. 1
2. 5
3. 15
4. 25

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305. The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than

1. 1
2. 2
3. 3
4. 3.5

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306. The shell side pressure drop in a shell and tube heat exchanger is maximum for _________ baffle.

1. Disk and ring
2. Segmental
3. Orifice
4. Independent of the type of

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307. The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is

1. 0
2. ∞
3. 1
4. Minimum

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309. The stress developed in a material without any permanent set is called the

1. Ultimate stress
2. Yield stress
3. Elastic limit
4. Breaking stress

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310. The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about _________ times the design pressure.

1. 1.5 to 2
2. 3 to 4
3. 4 to 5
4. > 5

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