Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Day 2- Chemical Engineering Principles > Equipment and Plant Design (ED/PD) > Flashcards

Equipment and Plant Design (ED/PD) Flashcards

1
Q

The ratio of shear stress to shear strain is called

A

Shear modulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A material that is seldom used for pressure vessel construction

A

Rimmed steel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Fresh water carrying pipelines in chemical industries are colored with _____ color.

A

Sea green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

25% cut segmental baffle means that the baffle

A

Height is 75% of the I.D of the shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Liquid/petroleum fuel storage tanks are built underground, when the storage capacity is less than ____ kiloliters.

A

45

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Le/D for fully open globe valve may be around

A

300

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Lug support is

A. The most suitable for thick vertical vessel
B. Same as bracket support
C. Provided usually for vessels of much smaller height than skirt supported vessels
D. A,b,c

A

D. A,b,c

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

With increase in the number of shell passes, the value of FT

A

Increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Holes of sieve tray are arranged in triangular pitch of _____ times the hole diameter.

A

2.5 to 5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In cae of a shell and tube heat exchanger, the min. shell thickness for carbon steel depends on shell diameter abd is in the range of ____ mm.

A

5-11

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

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

A

Elastic limit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the

A. O.D of the tube for square pitch
B. Shortest distance between two adjacent tube holes
C. Shortest centre to centre distance between adjacent tubes
D. None of these

A

C. Shortest centre to centre distance between adjacent tubes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele method?

A. Sensible heat changes for vapor and liquid are negligibly small
B. Reflux is not a saturated liquid
C. Molar latent heat of the two components are equal
D. None of these

A

B. Reflux is not a saturated liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The value of fouling factor depends upon the

A. Characteristics of process fluid
B. Velocity of process fluid containing suspended solids
C. Suspended solids in the fluid
D. A, b, c

A

D. A, b, c

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

In the case of the bubble cap distillation column of a diameter greater than 1.2m, the cap diameter is roughly about _____ cm.

A

10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about ____ times, that in a 1-1 heat exchanger having the same size and number of tubes and operated at the same liquid flow rate.

A

8

17
Q

To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

A

(1.2)^5/3

18
Q

In a heat exchanger, shell side fluid velocity can be changed by changing the tube

A. Layout
B. Pitch
C. Both a and b
D. Neither a and b

A

C. Both a and b

19
Q

It is where the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure

A

At the inner surface

20
Q

It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than

A

0.80

21
Q

A rivetted joint does not fail by ____ of rivets

A

0.55

22
Q

Triangular pitch tube layout as compared to the square pitch in a shell and tube heat exchanger

A. Permits the use of less tubes in a given shell diameter
B. Facilitates comparatively easier external cleaning because of large clearance
C. Permits the use of more tubes in a given shell diameter
D. Both b and c

A

C. Permits the use of more tubes in a given shell diameter

23
Q

Bracket supports are the most suitable for supporting ______ vessels

A

Thick-walled vertical

24
Q

In a multi-pass shell and tube heat exchanger, the shell side cross flow area does not depend upon

A. Baffle spacing
B. Clearance
C. Pitch
D. None of these

A

D. None of these

25
Q

Two iron pipes of the same nominal diameter but different schedule numbers will have the same

A

Inside diameter

26
Q

Lessing ring is formed by the addition of the partition across the centre of a raschig ring, which results in an area increase of about _____ percent

A

20

27
Q

In chemical process equipment, the conical bottom heads used, usually has an apex angle of

A

60°

28
Q

Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than _____ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop

A

75

29
Q

Correct use of ‘factor of safety’ is very important in equipment design. It is defined as the ratio of

A

Ultimate stress to working stress

30
Q

The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about _____ mm of water column per meter height of packing.

A

20-40

31
Q

In perforated plate towers, the

A. Hole sizes may be around 1/8” or 3/16”
B. Total hole area may be around 6 to 15% of tower cross-sectional area
C. Pressure drop is less compared is similar bubble cap towers
D. All a,b,c

A

D. All a,b,c

32
Q

The ends of a cylindrical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure

A

Ellipsoidal

33
Q

Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is

A

Less

34
Q

Pick out the wrong statement pertaining to the design of a basket type evaporator

A. It is used for high viscosity liquor having large rate of scaling
B. The tube bundle is suspended on bracket
C. There is no central downtake
D. Downtake is formed by the annular soace between the bundle and the shell

A

A. It is used for high viscosity liquor having large rate of scaling

35
Q

Speed of the drum of the rotary vacuum filter normally ranges from____ rpm

A

0.1 to 2

36
Q

A stuffing box is used for

A

Prevention of fluid leakage around moving parts

Day 2- Chemical Engineering Principles (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions