Process Equipment and Plant Design Quiz 1
1 / 50
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by_______?
2 / 50
(Le/D) for couplings and unions would be________?
3 / 50
A binary liquid Azeotropic mixture has boiling point lower than either of the components, when it shows ______ deviation from Raoult?s Law?
4 / 50
Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of ______?
5 / 50
1.2 to 3.8 cms is the value of the ________?
6 / 50
(Le/D) for a Tee (used as elbow, entering run) would be around _________?
7 / 50
(Le/D) for fully open gate valves would be ___________?
8 / 50
Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscosity above ______ poise?
9 / 50
Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle ?
10 / 50
_______ of water makes it a widely used coolant in heat exchangers?
11 / 50
A pipe is generally made of circular cross-section, because a circular cross-section has the______?
12 / 50
?A claming section? before the liquid flows into the downcomer is provided to___________?
13 / 50
A minimum clearance of about ________ mm is maintained between the distillation column wall and the bubble cap?
14 / 50
A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is_________?
15 / 50
A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about ________ percent of the flooding velocity?
16 / 50
______ heat exchanger is also known as ?hair pin type? exchanger?
17 / 50
______ strain is measured using a ?strain rosetter? ?
18 / 50
Baffle width is normally taken as _______ times the tank diameter?
19 / 50
_________ liquor is best handled in a long tube vertical evaporator ?
20 / 50
______ shaped roof is the most commonly used roof for cylindrical storage tanks?
21 / 50
A binary liquid Azeotropic mixture has boiling point higher than either of the components, when it shows _______ deviation from Raoult?s Law?
22 / 50
A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design______?
23 / 50
25 per cent cut segmental baffle means that the baffle___________?
24 / 50
_____ is the determining factor for the number of bubble caps to be used per tray?
25 / 50
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of__________?
26 / 50
A cylindrical pressure vessel of volume 6 ?m3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to_________?
27 / 50
A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the___________?
28 / 50
A ?rupture disc? is provided in chemical equipments as an accessory meant for _____?
29 / 50
A riveted joint does not fail by _______ of rivets?
30 / 50
_______ closure is the weakest enclosure for cylindrical vessels?
31 / 50
______ dished head is the strongest of all?
32 / 50
A perforated plate has holes of diameter dn arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by________?
33 / 50
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator___________?
34 / 50
An under-designed steam trap will_____?
35 / 50
A/an ________ is used for changing the direction of a pipeline?
36 / 50
A pressure vessel is said to be made of ?thick? shell, if the ratio of its diameter to wall thickness is________?
37 / 50
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure______?
38 / 50
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally ?
39 / 50
(Le/D) for fully open globe value may be around___________?
40 / 50
Apex angle of conical heads used in the bottom heads of chemical process equipments is usually___________?
41 / 50
Back-trapping in a distillation column results due to__________?
42 / 50
(Le/D) for a Tee (used as elbow, entering branch) would be ______?
43 / 50
A stuffing box is used for______?
44 / 50
An adequate clearance between the tray and the shell wall of a distillation column is provided to_______?
45 / 50
A cylindrical storage tank can have a self supported conical roof ?
46 / 50
________ shaped roof is most commonly used for cylindrical tanks ?
47 / 50
_______ tray arrangement is recommended for distillation column having diameter upto 4 ft ?
48 / 50
Accidents in chemical plants are mostly due to_____?
49 / 50
Baffle spacing is generally __________ the I.D. of the shell ?
50 / 50
_____ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.)?
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