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Process Equipment and Plant Design MCQs

Free 367+ Process Equipment and Plant Design MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Practise below with answers and explanations.

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Process Equipment and Plant Design — MCQs for Pakistan government job tests

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Process Equipment and Plant Design

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1.What is the value of the slope for the operating line in the rectifying section of a distillation column?

2.In agitation tanks, angled baffles are used to reduce swirling when mixing liquids with a viscosity near 200 poise. For liquids with viscosity exceeding what value can baffles be entirely omitted?

3.Which type of efficiency is capable of exceeding 100%?

4.What is the minimum recommended tube pitch in shell and tube heat exchangers expressed as a multiple of the tube's outside diameter?

5.How does a triangular tube layout in a shell and tube heat exchanger compare to a square tube layout?

6.Which type of heat exchanger is commonly referred to as the 'hairpin type' exchanger?

7.For heat exchangers with identical tube size and quantity, operating at the same liquid flow rate, how many times greater is the average velocity in the tubes of a 1-4 heat exchanger compared to a 1-1 heat exchanger?

8.When a shell is considered thin with a thickness-to-diameter ratio below 0.1, which factor can be ignored while calculating membrane stresses?

9.What is the value of (Le/D) for couplings and unions?

10.What is the typical ratio of tube length to shell diameter in shell and tube heat exchangers?

11.How can the liquid gradient across a tray be reduced effectively?

12.What is the typical slope range, in meters, for a counter-current flow rotary dryer?

13.In a multiple-effect evaporator setup with 'n' effects, how does the quantity of water evaporated per unit surface area compare to that of a single-effect evaporator?

14.Tubes are attached to the tube sheet (a thick circular metal plate) using tube rolling and brazing (permanent) or ferrule connection (removable). The thickness of the tube sheet is generally ____________ the outside diameter of the tube, but it must never be less than 22 mm (7/8”). What is the correct relationship?

15.In which type of flow is the highest plate efficiency observed?

16.What are the approximate Le/D values for a 90° medium radius elbow and a 90° square elbow, respectively?

17.What factor is used to determine the diameter of a sieve tray column?

18.What is the highest permissible total liquid gradient across a tray, measured in millimeters?

19.What is the minimum gap, in millimeters, that should be kept between the wall of a distillation column and the bubble cap?

20.How is a seamless pipe manufactured?

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